Drug and Alcohol Dependence 145 (2014) 48–68

Contents lists available at ScienceDirect

Drug and Alcohol Dependence

j ournal homepage: www.elsevier.com/locate/drugalcdep

Review

Supervised injection services: What has been demonstrated?

A systematic literature review

a,b,∗ c,d e a,b

Chloé Potier , Vincent Laprévote , Franc¸ oise Dubois-Arber , Olivier Cottencin , a,b

Benjamin Rolland

a

Department of Addiction Medicine, CHRU de Lille, Univ Lille Nord de France, F-59037 Lille, France

b

University of Lille 2, Faculty of Medicine, F-59045 Lille, France

c

CHU Nancy, Maison des Addictions, Nancy F-54000, France

d

CHU Nancy, Centre d’Investigation Clinique CIC-INSERM 9501, Nancy F-54000, France

e

Institute of Social and Preventive Medicine, University Hospital Center and University of Lausanne, Chemin de la Corniche 10, 1010 Lausanne, Switzerland

a

r t i c l e i n f o a b s t r a c t

Article history: Background: Supervised injection services (SISs) have been developed to promote safer drug injection

Received 18 May 2014

practices, enhance health-related behaviors among people who inject (PWID), and connect PWID

Received in revised form 14 October 2014

with external health and social services. Nevertheless, SISs have also been accused of fostering drug use

Accepted 14 October 2014

and drug trafficking.

Available online 23 October 2014

Aims: To systematically collect and synthesize the currently available evidence regarding SIS-induced

benefits and harm.

Keywords:

Methods: A systematic review was performed via the PubMed, Web of Science, and ScienceDirect

Supervised injection service

databases using the keyword algorithm [(“SUPERVISED” OR “SAFER”) AND (“INJECTION” OR “INJECT-

Safer injection facility

ING” OR “SHOOTING” OR “CONSUMPTION”) AND (“FACILITY” OR “FACILITIES” OR “ROOM” OR “GALLERY”

Supervised injecting center

Drug consumption room OR “CENTRE” OR “SITE”)].

Drug consumption facility Results: Seventy-five relevant articles were found. All studies converged to find that SISs were efficacious

Injection drug user in attracting the most marginalized PWID, promoting safer injection conditions, enhancing access to

primary health care, and reducing the overdose frequency. SISs were not found to increase drug injecting,

drug trafficking or crime in the surrounding environments. SISs were found to be associated with reduced

levels of public drug injections and dropped . Of the articles, 85% originated from Vancouver or

Sydney.

Conclusion: SISs have largely fulfilled their initial objectives without enhancing drug use or drug traf-

ficking. Almost all of the studies found in this review were performed in Canada or Australia, whereas

the majority of SISs are located in Europe. The implementation of new SISs in places with high rates of

injection drug use and associated harms appears to be supported by evidence.

© 2014 Elsevier Ireland Ltd. All rights reserved.

Contents

1. Introduction ...... 49

2. Materials and methods ...... 49

3. Results ...... 50

3.1. Overall results ...... 50

3.2. Description of SIS users ...... 62

3.3. The impact of SISs on overdose-induced mortality and morbidity ...... 62

3.4. The impact of SISs on injection behaviors and their consequences ...... 62

3.5. The impact of SISs on reducing drug-related harms ...... 62

Supplementary material can be found by accessing the online version of this paper at http://dx.doi.org/10.1016/j.drugalcdep.2014.10.012.

Corresponding author at: Service d’Addictologie, Hôpital Fontan2, CHRU de Lille, CS70001, 59037 LILLE Cedex, France. Tel.: +33 666816587.

E-mail address: [email protected] (C. Potier).

http://dx.doi.org/10.1016/j.drugalcdep.2014.10.012

0376-8716/© 2014 Elsevier Ireland Ltd. All rights reserved.

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 49

3.6. The impact of SISs on access to addiction treatment programs ...... 62

3.7. The impact of SISs on the nuisance induced by drug use in public spaces ...... 63

3.8. The impact of SISs on local drug-related crime, violence, and trafficking ...... 63

3.9. Impact of SISs on the amount of local PWID...... 63

3.10. Medico-economic assessment of SISs ...... 63

3.11. The opinion of PWID on SISs ...... 63

3.12. The impact of SISs on the opinions of local residents and police ...... 63

4. Discussion ...... 64

Role of the funding source ...... 65

Contributors ...... 65

Conflict of interest ...... 65

Appendix A. Supplementary data ...... 65

References ...... 65

1. Introduction Germany, Switzerland, Spain, the Netherlands and Luxembourg

(Semaan et al., 2011).

Injection drug use represents a source of numerous harmful SISs were implemented complementarily to other harm reduc-

effects on both the health conditions of people who inject drugs tion measures for the following purposes (EMCDDA, 2009; INSERM,

(PWID) and their social environment. Drug injection is one of 2010; Noël et al., 2009): (1) to reach the most marginalized popu-

the main factors in the dissemination of blood-transmissible viral lations of PWID, who are least likely to obtain access to medical

infections such as human immunodeficiency virus or the and social support, and connect them with health and social ser-

B and C viruses (EMCDDA, 2008; Joint United Nations Programme vices; (2) to reduce overdose-induced morbidity and mortality; (3)

on HIV/AIDS, 2002; WHO, 1997). In addition, numerous other to educate PWID to enhance their health behaviors; (4) to reduce

physical problems can result from drug injection, including other injection-related risks by promoting the prevention and education

viral and bacterial infections, cutaneous lesions, locomotive disor- of safe self-injecting practices; (5) to improve the global health

ders, and hepato-gastroenterological pathologies (INSERM, 2010; conditions of PWID by promoting the prevention, screening and

Klee and Morris, 1995; Palepu et al., 2001). Psychiatric disorders medical orientation of viral infections; (6) to foster the initiation of

are also more frequent in PWID (EMCDDA, 2008), who are sub- dependence care programs among PWID; and (7) to reduce the nui-

ject to reduced access to medical services (Kerr et al., 2005b). sances triggered by injection drug use in public spaces, e.g., urban

Moreover, PWID exhibit enhanced marginalization from society, violence and crime, drug trafficking and drug-use waste.

which increases their exposure to social precariousness, unem- SIS access is usually restricted and regulated (Hedrich, 2004;

ployment, homelessness, crime, and prostitution (DeBeck et al., INSERM, 2010). Most SISs are forbidden to subjects under 18 years

2007; EMCDDA, 2008). Thus, injection drug use induces consider- of age, pregnant women, irregular or unidentified PWID, and indi-

ably higher mortality. Partly because of its illegal nature, injection viduals who wish to experience their first drug injection. Internal

drug use is also responsible for numerous societal consequences, rules also forbid violence and drug selling. Moreover, many SISs

e.g., violence, traffic, crime, and public space degradation (Kerr prohibit drug sharing or helping other users with drug injection.

et al., 2005a; Renn and Lange, 1996; Singer et al., 2001). For these However, SISs have endured criticism. Some official organizations

reasons, injection drug use places a heavy burden on society. have argued that “any national, state or local authority that per-

During the early 1980s, PWID had to face the HIV epidemic. mits the establishment and operation of drug injection rooms or

Preventing viral infection became crucial, and, therefore, care pro- any outlet to facilitate the abuse of drugs (by injection or any other

fessionals had to consider the damage caused by drug use rather ) also facilitates illicit drug trafficking” (INCB,

than focusing on drug use itself. Moreover, in face of the failure of 1999). The detractors of SISs often argue that SIS implementation

public policies that aimed to eradicate drug use and drug trafficking is equivalent to the tacit acceptance of injection drug use by public

(Drucker, 1999) and in consideration of the number of PWID who authorities, which will foster drug use, attract drug traffickers and

were not ready to enter into classical abstinence care, new preven- increase drug-related consequences in the surrounding area (Boyd,

tion and care paradigms emerged, constituting the ‘’ 2013; Elliott et al., 2002; Gandey, 2003; Parliament of New South

approach (MacPherson, 2001; Wodak and Owens, 1996). The first Wales, 1998). This perception has often been shared by groups of

aim of these new care systems was to reduce the social and medical local residents and politicians in cities where new SISs were imple-

consequences of injection drug use and to stop the marginalization mented (Elliott et al., 2002) and has sometimes led to long court

spiral to which PWID were exposed (Berridge, 1999; MacPherson, procedures (Health Canada, 2006; Small, 2010; Wodak et al., 2003;

2001). In this context, the first exchange programs and the Wood et al., 2007).

development of opiate maintenance therapies were implemented Twenty-eight years after the first legal opening of an SIS (Zobel

(WHO, 1998). and Dubois-Arber, 2004), we have performed a systematic review

Similarly, new facilities emerged at the end of the 1980s, and of the literature to collect the published data currently available on

the first objective was to allow PWID to inject self-provided drugs SISs and to synthesize these data to determine whether SISs have

within a supervised framework in enhanced aseptic conditions achieved their objectives and whether the fears raised against them

with medical monitoring and no risk of police control (EMCDDA, are justified.

2008; Jozaghi, 2012; Semaan et al., 2011). These facilities have had

different appellations, including ‘safer injection facilities,’ ‘super-

2. Materials and methods

vised injecting centers/sites/rooms/facilities,’ ‘drug consumption

rooms,’ and ‘supervised injection services’ (SISs) (Hedrich, 2004; A systematic search for relevant articles was conducted and is presented herein

according to the PRISMA statement (Liberati et al., 2009). The research was per-

Noël et al., 2009). Throughout the present article, we will indis-

formed using the PubMed, Web of Science, and ScienceDirect databases. To avoid

tinctly use the term ‘SISs’ to designate these facilities. The concept

selection bias, an inventory of the different English appellations for SIS was con-

of SISs rapidly spread in Western countries, and in 2010, there

ducted, which led to our use of the following keyword algorithm: (“SUPERVISED” OR

were more than 90 identified SISs in Canada, Australia, Norway, “SAFER”) AND (“INJECTION” OR “INJECTING” OR “SHOOTING” OR “CONSUMPTION”)

50 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68

618 arcles idenfied throught electronic sources (PubMed, Web of

Science, Sciencedirect), using keyword algorithm: ("SUPERVISED" OR

"SAFER ") AND ("INJECTION" OR "INJECTING" OR "SHOOTING" OR

"CONSUMPTI ON") AND ("FACILITY" OR "FACILITIES" OR "ROOM" OR

"GALLERY" OR "CENTRE" OR "SITE")

Databas es :

• Pubmed : 448 (23 January 2014) nficaon

e

• Web of Science : 119 (23 January 2014)

Id

• ScienceDirect.com: 51 (23 January 2014)

no other s ources used for the idenficaon of addional documents

g 476 articles sourced after duplicates removed creenin S

476 arcles screened on tle review

312 arcles excluded :

- 20 non-English arcles

y

- 292 off-topic arcles ibilit g

Eli

164 arcles assessed for eligibility

89 arcles excluded on full-text review :

- 75 non-original arcles

- 1 non peer-reviewed arcle

- 13 off-topic arcles

Included 75 ar cles included in qualitave synthesis

Fig. 1. Systematic selection process of relevant articles used for performing the review.

AND (“FACILITY” OR “FACILITIES” OR “ROOM” OR “GALLERY” OR “CENTRE” OR Table 1 lists the final selection of articles, which were clustered

“SITE”). All results up to January 26, 2014 were examined in the article selection

according to the specific subject they addressed: (1) the description

process.

of SIS users; (2) the impact of SISs on overdose-induced mortality

The article selection algorithm is described in Fig. 1. After eliminating duplicates,

and morbidity; (3) the impact of SISs on injection behaviors and

relevant publications were chosen through the individual and independent selection

of titles by three authors (C.P., B.R., V.L.). The articles selected had to be written in their consequences; (4) the impact of SISs on the adherence to care

English and be related to SISs. In cases of disagreement between the authors during of PWID; (5) the impact of SISs on the nuisances induced by drug use

the selection process, the three authors discussed the article until a consensus to

in public spaces; (6) the impact of SISs on local drug-related crime,

include it or exclude it was reached.

violence, and trafficking; (7) the impact of SISs on the number of

A second selection round was performed upon full-text reading. The selection

local PWID; (8) the medico-economic assessment of SISs; (9) the

criteria were as follows: (1) peer-reviewed articles that (2) contained original data

on SIS assessment. The full texts of all selected articles were independently read by opinion of PWID on SISs; and (10) the impact of SISs on the opinions

two authors (C.P. and B.R.). If one of the readers believed that the full-text article did

of local residents and local police.

not fit the eligibility and inclusion criteria, a final round of selection was performed

Approximately 68% of the articles came from SISs in Vancouver

through a consensual decision that included the same three authors identified above.

(n = 51), 17% from SISs in Sydney (n = 13) and 3% from SISs in Europe

The quality of all of the finally selected articles was evaluated using specific

tools. Observational studies were evaluated using the “Strengthening the Repor- (n = 2). Approximately 12% of the studies do not come from a SIS

ting of Observational Studies in Epidemiology (STROBE) statement” (Vandenbroucke (n = 9).

et al., 2007), and medical economic studies were evaluated using the “Consolidated

Different study designs were found.

Health Economic Evaluation Reporting Standards (CHEERS)” (Husereau et al., 2013).

Of the 75 finally selected articles, 32 articles were about cohort

Because there is currently no consensual assessment method for either qualitative

studies, among which 3 were descriptive studies (Kerr et al., 2006b;

studies or surveys (Bennett et al., 2011), we did not score these types of articles in

our review. Marshall et al., 2009; Stoltz et al., 2007a), 13 were analytical stud-

ies (Bravo et al., 2009; Hadland et al., 2014; Kerr et al., 2005c;

Lloyd-Smith et al., 2010, 2009, 2008; McKnight et al., 2007; Milloy

3. Results

et al., 2010, 2009; Wood et al., 2005d, 2003, 2008, 2005a), 12

3.1. Overall results were evaluative studies (DeBeck et al., 2008; Kerr et al., 2007c;

Kimber et al., 2008a; Milloy et al., 2008a; Petrar et al., 2007; Reddon

We initially found 618 articles using the aforementioned key- et al., 2011; Richardson et al., 2008; Stoltz et al., 2007b; Wood

word algorithm, among which 75 articles were finally included in et al., 2006d, 2005c, 2007, 2006c), 1 was both a descriptive and an

the review (cf. Fig. 1). analytical study (DeBeck et al., 2011), and 3 were cross-sectional

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 51 quality

CHEERS

STROBE

21/28 19/29 24/29 23/30

scores or

NAIs) 22/33

(S): (S): (S): S: (S): Studies assessment with (6 (5NAIs) (5NAIs) (4NAIs) (S) (C) (1NAI) a

in

for use

of the is

1.59,

1.9,

1.90, 3 or male

= =

in

=

for attend

having of

5.30,

they [0.2–0.9]). type

(OR private

). Factors engaged = injections

to 4.9,

lived

HIV+ 2.5,

(aOR

= 20.43,

attending

site (aOR heroin

=

number

=

2.38, in

= 3.29, syringes

female.

types for

= SIS. of and =

not [1.34–4.45]

Vancouver’s

few

public

2.3,

the

(aOR small/medium with

already =

(OR which

[1.38–2.96]),

(OR

= Screening

with

Eastside

95%CI in injection having large

=

having (aOR the

income used

Four

the

inject

(aOR

on (aOR 33.8%

3.1,

of used (OR

= to 0.4, +2%. (13%):

or

and and users,

heroin; 95%CI

(31%),

reasons

= SIS

used

2

injection used

95%CI

1.56, days sex illegal

years 1x/week (OR [1.72–3.24]

injection

= homelessness injected

cocaine.

HIV:

years), associated the +

= (OR bisexuality of women.

2.44,

associated

type few home

Downtown of daily = major

>30 2.02,

associated:

regular

male

youth 2.7

[1.96–5.56]),

= use

(aOR at

and

28% HCV borrowing

± attendants subjects

= injections

especially

of ( the

and

95%CI

willingness

having homosexuality The and age

study

source

(aOR of of SIS Factors [1.08–2.25]) [1.53–2.84]) use:

of

in

Factors The a injection> speedball and

= (aOR =

(58%):

following: especially

cocaine; Factors

and the

years,

SIS 1 95%CI

2.36, years

42.3% 26% 39%

94%. with services surrounding

of =

prevalence

the injection 33

95%CI 95%CI injection,

weekly once. number type injections 22.8 with

injection 3.33,

(21%),

aOR

of

year: =

age: of injections. –

health [2.38–4.54]), [1.30–2.77]), [1.05–2.42]). [1.07–2.27]), [1.21–4.67]), [13.21–31.59]) [3.13–8.93]). [1.2–4.3]), [1.1–3.1]), [2.7–8.8]), [1.5–4.3]), [1.4–7.1]). injection,

2.08, 1.56, especially

======age:

time least

findings

of

large drug

= = of

place included included days

associated (aOR

at

local

Approximately Mean Approximately Self-reported Main Average SIS number 95%CI associated 95%CI and daily 95%CI previous 95%CI SISs 95%CI 95%CI inject, 95%CI (10%). Approximately not (aOR 95%CI cocaine 95%CI described: neighborhood of (aOR psychostimulants (4%): spent sex 95%CI 95%CI safe days SISs >25% 95%CI to to

period 09/2005 12/2005 05/01/2001

04/30/2007

2002 From 05/2008 03/2012 From Study From to publication.

of

HIV

by PWID among in among

and of of

date

factors

profiles of of use

Barcelona use use use

by

associated associated and associated

(16–24 street purposes HIV+ in

SIS SIS SIS

Madrid DCR

then

Factors Description Measure Description with years) testing with with Study Factors research young PWID PWID and PWID factors injection self-reported prevalence, associated and clusters,

by

study study study study and and

study

arranged

design

are

Study Analytical, longitudinal, prospective Descriptive Descriptive Analytical Descriptive cross-sectional prospective analytical, prospective analytical, prospective Articles

review. partici-

of

395 249 414 9778 Total pants 509 literature

Room

systematic profile:

and

ACCESS Drug Youth

the (Spain) Vancouver Vancouver

“ARYS’

cohort,

Geneva

of of

users of

PWID’s

Population Madrid Barcelone (At-Risk Cohort PWID MSIC Itinere PWID cohort, Consomtion Study), (DCR), (exhaustive population) synthesis

population, al.,

2014 result

et 2011 date

2009

al.,

al., al., target

et al., and

et et

the et

1

2009b publication 2008 Reach Authors Hadland Reddon Salmon Bravo Dubois-Arber Comprehensive Table

52 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 quality

CHEERS

STROBE

27/32 21/29 19/29 23/29 19/25 17/30

scores or

(S): (S): (S): (2NAIs) (5NAIs) (5NAIs) (5NAIs) (9NAIs) (4NAIs) Studies (S): (S): assessment with (S): (S) (C) to in

1.50,

= 2,

impact (OR=

1.27, 1.56, was

Cross

heroin

=

= = 0.47, years.

adjusted needle local

no

= kit. (OR

of

(OR in was King 2.38, 2.13,

HIV.

(OR

Factors (28%).

estimated the PWID The

consumption

(aOR and has

= =

(OR

injecting of meeting

]. in

36–40 . month. of

Approximately for

employment

on .

homeless injecting

SIS

. [1.99–13.71]),

(OR (OR use [

history were

= help

injection per binge injection of

cocaine

age: status

consumption

4.3%

(80%), PWID

cocaine involved

methadone

[1.24–3.35]).

history

MSIC daily an

injections

88% or

and

treatment =

of

regular

PWID

2.88,

Only and

use 95%CI

and

39% on

sharing the

= [1.33–83.46]). − [1.02–6.19])

[59.1–86.7]).

HCV cocaine heroin = needing [7.3–10.8]). =

= +/

median

of

seropositive

attendance:

= 95%CI

2.9%

methadone population (OR injection

5.24,

1.06). population

MSIC attendance (40%)

and

=

had =

obtaining

daily current no daily addiction needle study employment

95%CI

95%CI male, were women,

daily

2.04,

the aboriginal (range prevalence

the

[1.07–4.37]); [1.08–2.28), [2.50–4.73]) [0.43–0.86]),

(range (OR = PWID

HIV,

and = = =

=

the

to

of (aOR

coverage SIS

heroin

36.3% 73% 17% 30% with

between

2.55, Regular

of

(OR

10.52,

= [1.57–3.63]), 18% 70.7% 8.8%

total

= The

=

attendance: factors:

95%CI 95%CI 95%CI 95%CI with

(10%),

at at

incarceration

housing of

the drugs: calculated

(OR

entrants [1.06–1.52]). [1.29–6.40]), [1.65–3.44]), [1.07–2.10]), [1.49–3.06]), [1.12–2.17]), [1.44–2.78]), [0.32–0.69]. of

coverage

======of months.

findings

2.16, 1.57, 0.61, 3.44,

95%CI

of estimated associated 6 = = = =

employment new

Indirect Approximately Unstable Approximately Approximately Approximately Main 95%CI caregivers history estimated 2.39, rate 95%CI associated (OR incarceration last 11.3% (OR prostitution, 95%CI (OR Associated 95%CI be was estimated was sharing (OR on 95%CI population. 95%CI overdose(OR 95%CI Injected 95%CI Patterns

period 11/01/2001 12/01/2003 12/01/2003 10/03/2004 12/01/2003 12/01/2003

10/31/2002 12/31/2005 05/01/2005 04/30/2005 03/31/2005 06/30/2004

From From From From Study From From to to to to to to to SIS SIS and

use

of and of

a

for

to 29 and

obtain PWID factors for of SIS

with

SIS

PWID coverage to of

the

and

estimation

associated and

purposes of under attending PWID estimates attending

attendance

PWID impact

among MSIC SIS

compare a

To SIS’s Study Epidemiological characteristics the associated indirect HIV attending confined geographic location attendance these with PWID patterns PWID seropositivity mean Study methods injection Epidemiological characteristics factors calculate employment prevalence PWID epidemiological characteristics daily years prevalence of

study and

study

study

design

Study Evaluative observational study Evaluative observational study Descriptive, prospective Descriptive, exhaustive Descriptive, cross-sectional study Descriptive evaluative partici-

of

761 4764 pants Total 1090 1035 904 135 of of of of

Cross who

around cohort 2 King

cohort cohort cohort

Vancouver

users

in

km of

Population MSIC) live (=2 MSIC Participants Participants SIS Participants Participants SEOSI VIDUS SEOSI SEOSI users

)

al., date

2006c 2007a

et

al., al., al.,

al., al.,

and

et et

et

Continued et et

(

1

2006a 2006b 2008a 2008 publication Authors Kimber Richardson Stoltz Tyndall Tyndall Wood Table

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 53 NA NA NA NA

17/25 17/28 21/28

18/25 24/26

(S): Scores: S: S: (S): (S): (experimental study) (experimental study) (experimental study) (Qualitative study) Scores: Scores: Scores: (9NAIs) (6NAIs) (6NAIs) (9NAIs) (8NAIs) in an

of

87% of

calls

to

in the for

of

with the public in heroin

compared history injected

been

1.6, overdose,

injection

2.7, involved

injection

injection in in

Protective

of history

unstable

=

deaths.

=

syringe individuals. of

transfer

oxygen

and

53%

and overdoses

number 11% no

have

SIS 453 45% (OR 0.6, 605)

of (OR infection:

of public and = = public

attendance (30%).

associated

overdose

the observed

the N

( injection history were injection

HCV an given,

SIS years, reduction).

and not

of [1.5–4.4]). different

a

[1.0–2.7]),

deaths (aOR

prostitution [2.1–6.1]),

=

cases,

cocaine = injection,

31 for

[1.1–2.9]), were 40% = MSIC,

90

number including overdose daily

=

was of

or

1.05).

There

(9.3% infection

in

allowances,

advice of = [1.2–2.7]), age

first

the

the 95%CI heroin = vicinity

95%CI

reported

found:

daily, (35%) 27%

95%CI at

of

reported

HIV

Administration factors individuals

in

of overdose (OR

95%CI cases.

in care,

the 2.6,

SIS social

1.6, of male, [1.07–1.99]) [1.09–2.06]).

12%

of 3.7,

=

history and = of = = 95%CI

in

Risk 1.8, injections =

overdoses, inject

[1.7–3.9]), [1.3–3.2])

11.7

hours

overdoses. the

= Factors overdoses

= = Vancouver

88% 58.53% 70%

and of

21% with deaths.

). (OR

1.7,

of (aOR

68% 2 8 of

years-old

43%

and

injection = (aOR

in

95%CI 95%CI

1004

336 no HCV+

overdoses

m open

reductions (aOR

75% quality

live

by

km

19

95%CI 95%CI

1.9

conditions. rest in of

years (OR

[0.3–0.9]). [1.1–2.5]), [1.2–6.1]), months. the

500 daily 1.5

1.45, 1.50,

and

56% were were = = = were

than

2.6, 2.1,

=

the = =

<30 between six = = hospital

avoided

safety cases,

Speed During Approximately Age Approximately SIS Approximately There life-threatening Significant (aOR factor: of study more in 95%CI last within heroin. incarceration avoided. the (OR increase 95%CI There and 95%CI prostitution, (area decreased housing borrowing with prostitution (aOR (OR Between overdose, areas, to

to and to

after

before

05/1998 12/01/2003 12/01/2003 06/05/2001 01/01/2001 03/01/2004 12/01/2003 11/2005 03/01/2004 opening

months 09/21/2003

months 07/30/2004 05/01/2004 04/30/2002 09/20/2003 60 02/06/2008 12/31/2005 02/06/2008

From From From 36 From From from From to 02/2006 05/2006) From From to to to to to to to (from MSIC 31/12/2005 the of

the the SIS

of of of SIS with

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for and

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to and

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users ambulance

register collection, report Participants Participants MSIC SEOSI cohort NSW Users Participants Participants Participants SEOSI VIDUS SEOSI SEOSI SEOSI service Vancouver’s (exhaustive population) mortality

and

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2008b 2008a 2005a 2005c

al.,

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al., al., et al., al.,

et et morbidity

al., al.,

et et et et

et et

2011 Wood Wood Kimber Marshall Salmon Milloy Milloy Kerr Kerr Reduce

54 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 quality NA NA

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17/27 23/29 23/29 21/27 25/29

S: S: S: (meta-analysis) (Qualitative study) S: Scores: Scores: assessment with S: (S) (C) (7NAIs) (5NAIs) (5NAIs) (7NAIs) (5NAIs) in or

the

to

time SIS

(2%), safe with after 2.04,

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and

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69%

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[0.93–3.06]). the consumption

program, 2.13,

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[1.93–3.87]),

[2.03–3.85]), = [0.95–3.13])

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[1.84–4.15]),

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positive

in

10% =

=

=

= reuse

and

regular

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period

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recent [2.13–4.18]), significant

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attending =

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95%CI

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or

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the

of

2.6,

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0.30, 2.7,

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2.79, analyses, 1.72, = 3,

= in

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=

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the

prostitution,

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cases, of in (aOR

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of

of

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03/2007

to

period Main 05/06/2001 05/01/2001 11/2005 03/01/2004 07/10/2004 12/01/2003

10/31/2002 04/30/2007 03/01/2005 06/30/2005 06/01/2004

From 02/2006 From From From From From to to to to to to

rate to

and

an safe

of on

of the

on factors on for

related

and practices practices of

sharing related associated

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syringe impact impact of

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SIS SIS’s Factors SIS’s Incidence, characteristics Estimate at injection syringe problems care with the Factors education injection sharing injection education injection associated

study study and

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to

partici-

of

educate

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of of of of

injection

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the

cohort

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users users

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Population MSIC Studies (22) MSIC Participants Participants Participants Participants SEOSI SEOSI SEOSI VIDUS (exhaustive population)

associated

)

date

2008 al., 2007b

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Wood,

2005c

al., 2008

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al., al.,

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et

the

al.,

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et

(

et et Beek

1

2009a 2009 2004 publication Authors Van Milloy Salmon Fast Wood Stoltz Kerr Reduce Table

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 55 NA

21/29 18/29 27/33 27/30 26/33 23/29

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SIS and

HIV

sent

two

not to an

which 7.07, HIV+

during by was

= 1.49,

the daily

wide by

Factors Among

in

= shooting

hospital

injection a daily decrease

help inject

were

(OR associated a days whom and

gender

over to

1.54,

and

factor hospitalised, The Factors competent

and

and

(aOR of

caused

12

=

daily 1.00]).

2.20, reported who condom a syringes [1.02–1.95]).

8% participants

of with

= = [1.13–2.4]). a

help

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65% = by [1.51–3.31]). [0.00–0.78]),

education. were

Factors

seropositivity significant 1.68, female

orientation unstable requiring

= = HIV+ with injecting used

=

those

(aOR [0.97– an years

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95%CI

=

HIV

care,

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disorders =

[2–7])

infections.

judgment,

95%CI

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95%CI with = 95%CI the

[1.03–1.94]) [3.39–8.55]).

of public = associated

participants

a facility inject

purpose. = =

1.41,

increased included

95%CI main is = 1.52,

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95%CI to shorter

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statistically

participants

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and

this 95%CI care

received [1.16–2.75]), [1.32–2.64]), [1.03–2.48]), (95%CI

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[1.42–4.74)); [0–7.90]). of

be

= = = 95%CI 95%CI devoid individuals

cutaneous 0.99,

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=

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(OR injection

one [2.16–23.13]) [1.62–2.98]), [1.09–2.16]) [1.16–2.43]), [1.10–2.03]), associated:

of

use sharing

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03/22/2004 05/31/2003 01/01/2004 12/01/2003 12/2003 11/2005 01/01/2004

10/22/2004 10/22/2004 12/31/2005 01/31/2008 12/31/2005 12/31/2005

From From From From From to 02/2006 12/2005 02/2006 From From to to to to to of due

an

to the

during

a other a

SIS

on and and and

to care of or due

use

injection at qualitative

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relations

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needle receiving risk

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PWID seropositivity infection factors factors factors among with with hospitalization to education with with Factors Condom Factors Incidence Incidence practice cutaneous infection the cutaneous injection-related infection study to cutaneous complication, owed to Incidence sexual sharing developing provided safe injection

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al., al., al.,

et et et 2005b 2005d

2009

al.,

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primary

et et et

2010 2009 2008 2009 Wood Wood Lloyd-Smith Lloyd-Smith Marshall Small Lloyd-Smith Provide

56 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 quality NA NA

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scores or

22/29 21/30 23/31 14/27

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=

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to program (77% declined

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addiction Its list.

entry: majority attendance [1.09–2.56]).

use associated housing

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daily

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of

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SIS entry

to

95%CI

heroin waiting =

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of

=

a

=

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to 95%CI for treatment: =

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=

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SIS counselor was

1.57,

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the this

of

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for

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transfer 1.33,

a [16.2–29.9]).

= 21% addiction

diploma service (95%CI 1.6, 12% incidence to

=

staff

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associated with with

95%CI 95%CI 95%CI

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needles(OR with [1.13–2.08]) [1.09–1.98]), [1.11–1.58]), [1.25–2.38]) [1.41–4.22]) [1.06–1.90]). associated associated:

to (aHR

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months oriented). ======

findings an = = =

school

57.21% confirmed

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seemed average,

the

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period 12/01/2003 05/2001 12/01/2003 12/01/2003

06/01/2006 03/01/2005 03/01/2005

From From 10/2002 From From Study to to to a

the a

of

and

the of

social on on and

to

in of with PWID

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use

processes and

particular by of associated

to

an

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of

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date 2011

2010 2007 2006d

2008

al., al.,

addiction al.,

al., al.,

al.,

and

et et

to et

Continued et et

et

(

1

2008b publication Authors Small DeBeck Milloy Kimber Wood Wood Access Table

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 57 NA

23/33 10/21 20/32 15/32

S: S: S: Scores: S: (experimental study) (1NAI) (13NAIs) (2NAIs) (2NAIs) of of of

94]

in

rest with at 57] = vs.

180 drug

the

the the = (4.3,

use

1.77,

of firearm 0.99,

and the vs. when

in: or [SD = Sydney between

=

the a

order

time of injection [SD

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of

in 1.60, opening

of

related in trends people

5.39,

SIS

25]

=

cocaine

public Decrease vs. = (124

=

injection

(aOR of

0.001).

(aOR with rest

0.022),

of

estimations

the found injecting

(302

included stable

0.803)

[7.3–14.3] rest = in 601.7

frequent =

public

[305–317]).

and = =

heroin p

p [SD

3.63, 11.5 (aOR

steady waiting

the

trafficking [4.7–6.3])

=

p (aOR

rate

3.1, 305.3,

=

SIS

the theft

=

help

after and =

were in

0.565). 11, or injection heroin IQR

vs.

each

possession vs.

model, 11, difference and = =

number

daily factors

(174

Discordant this the

opening

for

[3.5–5.4])

=

p

of

KC and (aOR

trafficking

df

injecting and =

(95%CI remained

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burglaries

df

and unlike

syringes sharing

trend

(95%CI at

SIS. injection

(11.5,

11,

[1.5–3.0]; [2.11–5.6]). incarceration

possession follows: with

after

need were: =

= = level

car

KC

drug

rate

4.22, frequent

5.4

(up the as

outside 0.014). follow-up, PWID

before

df 305.3

0.26,

=

reductions

0.010) at of possession (95%CI

the = traffic

robberies and housing

= regression

significant

IQR

of

vs. =

and of

needle Associated public

p

and

vs. recent

daily

[1.84–3.98]) [1.11–1.71]). [1.01–2.54], p

or 95%CI for dropped

syringes

theft no 4.3, facility were [490.0–830.3]

rate -stat = = =

2.4

t waste -0.59,

-stat

=

downward

stable

t

associated =

periods

before

homelessness vs. thefts

the

was

3.26, mean

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vicinity

retail 48]; IQR

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of significant

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24];

= the

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Sydney

unadjusted t KC, the in [3.0–8.0];

in

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and

discarded [1.9–3.0]), [10.0–13.2]) [590–613]) of there

of

=

[1.46–6.58], [1.15–2.73]), [1.96–14.78]), [0.79–1.23]). [2.70–4.88]), [1.11–2.31]) found:

[SD [SD

33% (aOR was at in

= = =

1.60, 2.71, 1.38,

the ======remained

(601.7, [4.0–4.3] [246.3–387.0]; mean 21]; = = =

recent IQR = = = SIS predicted safer SIS number rest

increase

116 227 and

Sydney).

Overall, Factors The No trafficking; Using injecting number 95%CI (95%CI 5.3, comparing (aOR vs. the (aOR publicly following: vs. the Statistically drugs Sydney) 95%CI 95%CI of narcotics). 95%CI [SD IQR 95%CI daily (aOR measure the crimes (increase IQR injection-related 95%CI (stable 25 the the the (95%CI (95%CI litter to

weeks

12

opening

weeks

to

06/02/2004 6 01/1999 07/01/2004 10/01/2003

SIS

07/2005 11/30/2005 09/30/2005

From From From 03/2010 From before From after to to to and SIS

the SIS public

on

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local

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city

to related into

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58 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 quality NA NA NA NA NA

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14/23 21/23 18/31 19/29

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C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 59 NA NA NA NA NA

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being

of

a more

opening

= injections

previous to

willing professional time

>number

police, to

equipment

were

(including of

identity.

would were use of

Motivations:

be [1.4–4.5]).

the

place could

payment the were = decrease

equipment SISs causes 95%CI SIS MSIC in

Waiting

prohibition

risks of of SISs attended

safety, having

reported

the one’s sterile

later

structural

assisted

to

Associated 69%

MSIC.

SG at

settlement,

suspension.

months 2.6,

would

the

95%CI day

a fear assistance

= area. and

6

and

sterile who overdose.

with overdose.

the limitation people

the

health

prove therefore,

visits

SIS: the daily.

2.5, of SIS

during of

of disabilities

attending

attending >3

used

=

injection

(aOR

between

of after use

receiving

PWID’s

go by police.

and

public

in the in

with PWID subjects and, or

the practices

secondarily

SG.

to

case

a physical

SG case conditions.

advice.

and SIF reduce of with of of

to prohibition.

the (aOR

and

Obstacles: receiving

in [1.47–3.30]). in areas

PWID a of

in for

of

min had to

associated

= the

suffered absence safety,

would by

agree

PWID PWID

use

number

distance 72% 85% 31

interpersonal

OD. and

in use

and cameras

close care

of of >15 unsafe

wanted

SISs room

the injecting

injection people

inject

the of

50%

to public

hygiene

in by 95%CI source in

smoking

arrest by injection

live to care to

in

a Consequence: 68% collected collected

seeking

time and

media, safety violence

help

drugs

and

case

against to

months,

individuals and 2.20, SISs

3 two-thirds in

significantly access,

the adequate MSIC, purposes purposes = Assisted

injection SIS,

need

Women The The Approximately Waiting Approximately Refuge Approximately was increased interested speedball lookout having to SIS. benefits. adequate willingness from obstacles and theft, the help these months; Provides facility (OR follows: performed sharing than monitored syringes and after seeking free syringes injection and the to to to to to

from

to from

11/2005

to and to

from

12/2001 11/2005 02/2005 01/2001 09/2011 11/2005

03/2007

From from From from 09/01/2008 From From 12/2011 05/2003 02/2006 02/2006 10/2001 2008 11/2005 Interviews: 02/2006; datas: 08/31/2009 12/2003 to SIS SIS of

and a

SIS

use use

their

about

SIS street the

of and

and SG MSIC and

to

the

who

on

SIS

to and

suffered the injection

on on use.

Francisco

opening opinions motivations motivations opinion in

traffic use,

Vancouver’s impact

PWID women

attend attend San

PWID Description PWID Willingness, motivation SIS to to about Vancouver’s Vancouver the Estimating violence inject functioning attendance impact PWID PWID probability obstacles ethnographic observations drug MSIC’s practices by local in impact assisted by

study study, and study, study, and

study

survey survey

Sample Qualitative Qualitative Qualitative Cross-sectional repeated Qualitative Qualitative Qualitative representative sample descriptive cross-sectional study representative sample sample descriptive, prospective cross-sectional study 8

+

inter-

SIS’s

workers

+

PWID

PWID

PWID

connection

25 with in 23 640 602 (representative sample) 50 50 50 115 views health database

PWID

of of of

SEOSI

shooting of

(SG) VANDU VIDUS

cohort cohort cohort of

Fransisco

cohort Cohort Cohort Participants Participants Participants San Women PWID SEOSI SEOSI SEOSI gallery

2011 2013

Dolan, al., 2012 2011b 2011a

2010 al., al.,

et

al., al., al.,

et and et

al.,

et et et

et

2007 2008 McNeil DeBeck Small Small Small Kral Fairbairn Kimber

60 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 quality NA

CHEERS

STROBE

scores or

14/31 20/33 22/32 24/32 12/31 15/31

S: S: S: Scores: S: S: (qualitative study) S: Studies assessment with (S) (C) (3NAIs) (1NAI) (2NAIs) (2NAIs) (3NAIs) (3NAIs) as it 2,

did

=

or less were for

the (12%). of did with more

SIS,

about with

Factors

it

for a

who when position

SIS between

share (aOR if

and SIS an

existing (7%),

1.81,

disposal. 2.02, the

and

inject

who injection =

an

SIS solve

=

undermine give

presence, 71%

SIS

in SIS. to

and years

the

[1.24–4.42]),

[1.07–5.79].

areas an obtaining disease =

=

71% using an reasons injection 29% not

use to

Injecting

hours

the

SISs

the

messages (aOR

(aOR 3.72,

associated

3.07,

<20

in

distance

in in syringe

to frequently. =

use drugs, do =

of [1.35–3.17]), [2.27–11.28])

police

the public

[3.79–11.55]), 3.08, unanimous = =

that exacerbate 95%CI main Main to public 95%CI =

purchases, =

with

of

dependence in

reduce

safely.

[1.62–6.00]), [1.79–8.95]), this

associated:

Obstacles

SISs 66%

help(18%)

(aOR confidentiality/privacy or in (aOR

= =

illicit

and

1.52, distance opening Factors

to

unsafe

to do wished to injection = 83%

2.33, 95%CI

95%CI

of 2.43,

(aOR drug confusing think

injections that 95%CI [1.01–5.5]), =

more

=

Obstacles: difficulties fail the

willing interested interested severe

purchase,

less prostitution

=

(5%), 17% 95%CI 95%CI create inject. Factors satisfied injected

use

use

clients

(aOR strong

users 2.07, 5.06,

persons

send their

4,

SIS: and

to 6.62, a (aOR PWID early and heroin injection

=

=

(aOR study

and

area.

5

=

inject are were are were were of drug

[1.40–3.98]), [1.03–1.16]).

and the

= of and

settlement.

order,

time

3.12, 95%CI an

= =

drug interested. thought report

compared injection; male

of

them.

of sex = convenience,

the

had

prohibition

(5%),

of need (aOR the (aOR (34%).

75% 95% 76% 65% 37% 89% 71%

(aOR to more use (aOR of not

zone

56% injecting rates, -2.30]), 3.37,

they

private

with the

95%CI 95%CI

to

(aOR male place addiction,

anonymity.

public a

months,

recent waiting

with

the

overdoses

relief

maintain

mode drugs with

and 6

of

of

were

in in help

in (aOR [1.24–7.63]), [2.41–5.73]), [1.18–7.99]), [1.01 [1.27–3.16]), [1.22–2.68]) [1.31–3.12]). SISs; of

of and

to

syringes

injection: problems. 2.36, 1.09, presence

======

findings most = =

described agree immediate 49% lack participants syringe

main SIS acceptability

public

The Approximately Approximately Approximately Approximately Approximately Main Approximately and homelessness 95%CI and police needing the (aOR public 95%CI efforts use Obstacles: injected (aOR attendance: sterile the public injection against in injected 95%CI 95%CI associated: prostitution 80% problem 95%CI 95%CI injecting 95%CI transmission feeling located opiates accountability Approximately previous their the was willingness history and

to to to to to

08/1999

in

period 12/01/2003 04/2001 10/2002 06/2001 12/1999 12/2008

09/30/2005

days

2 From From From 01/2010 02/2000 02/2002 01/2003 06/2002 From From Study From to a

SIS to

of to SIS

use in (CSC)

PWID

PWID for

about on to

and and

wishing

of factors

use the of order

police

SIS SIS Supervised PWID the

associated

use

in a a

purposes of willingness expectations

SIS this

willingness

and

to use use this

Estimate PWID Characteristics PWID Estimate factors associated to and deduce characteristics associated with to to Study Evaluation Consumption implications Ottawa go perceptions Centers proportion opening satisfaction willingness public SIS

study

study Study

study

sample design

Study survey Evaluative Analytical prospective cross-sectional study Descriptive analytical prospective cross-sectional study Descriptive analytical prospective Descriptive prospective, cross-sectional study Descriptive, cross-sectional study, Qualitative SISs:

partici-

of

toward

251 18 178 pants 506 Total 1082 587 215 policies

in

of in

local

of of

needle program PWID

and

police

PWID PWID and PWID

cohort (SurvUDI

cohort

police

Population exchange study) Toronto attending Participants Montreal Ottawa Participants Sample Sydney Ottawa public SEOSI VIDUS officers public Melbourne (Australia)

residents, )

2012 date

2007 2003 2004 local

2000 2004

al.,

and of

al., al., al.,

and

and et

et Continued et et

(

Beek 2002 1

publication Leonard, Gilmour, Authors Petrar Green Navarro Wood Fry, Van Watson Opinions Table

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 61 Drugs;

NA NA

Vancouver

=

Inject

18/33 27/32 23/31 15/31

Scores: S: S: Scores: (qualitative study) (qualitative study) S: S: (1NAI) (2NAIs) (3NAIs) (3NAIs) Who

VIDUS

People of

Users; do

=

and 28%, and of with

to

least

the by

57%, SIS.

53%

SISs

disease, police. vs drug

the

program Drug the at

of

vs reduce political local attract 65% an public PWID

negative

for

them.

of

(residents: the and (residents:

crime,

those of

33% to

nuisances

by

by do local of

conditions.

suggested the and 72% use operators:

Views: injection, within

SIS

social fearing and SIS

of associated

approved to operators) 58%

but the

with

deals Wales; 25%

accepted PWID

infectious

feasible

an SIS. PWID follows: injection

supported

follows:

by

Many the

and with dropped Network

or

part for

levels

as (also as

from accepted Expectations

users to the drug

policies. operators: religious is

complicate business

most

South

willing mixed,

reassuring operators:

cautious of of

of about

create

SIS

Area public

(business

insecurity SIS nuisances

not in

were

and sent were

The

were

to

attracting with

appeared

favor. medical 0.01;

accepted

New

syringes feasible

the

were

being do less < overdose the

=

favor more 58%

in associated

achievable.

p education health of injections

business respondents the

laws

and

were

fears

inject in less public was

number

business

use, of et of are that

which

the from to NSW 38% and

opinion. use

19%, the those complaints

SIS

Vancouver

seemed the

with machines

programs. necessary

=

were

66% 16.7% 60% reported

vs 0.03), 0.80 0.01; opening:

drug

in

and

learned it

responses

nuisance

reduce

< < <

and less The

were

neighborhood,

and drug (75%),

collaborating changing

p p p

2005, deaths

public inconveniences 2%

Centre; nuisance three felt

improve believing syringes. MSIC

In and contact

the PWID of

and

approximately

NEP and

vending VANDU

public awareness

28%, 40%, 26%, and change policy

the of

the

the vs vs vs (residents) reduce of PWID

no encourage

public

0.01), 0.26).

2000,

< < Injecting

users); After In Ten Approximately Approximately 38% Approximately (residents:33% favorable health respondents. Syringe police, PWID. encouraging but SIS: 67% the Thirteen raising image professionals) dropping p one leaders, subjects respondents 70% 28% traffickers; p enforcement, structures. promote was reduce community, Professionals’ not strength injection,

drug Range

in in

Supervised

2006

and and

2007

(=injection

InterQuartile

August 12/01/2003

=

Medically

March 12/31/2005 10/2000

IQR

2003 From From 11/2005 10/2002 in10/2000, in10/2002 in to to Injectables Sydney

=

Interval;

MSIC SIS

policy and

and Drogues needle

of

of opening opening Dublin of

of SIS’s program local

de

SIS

in machines

of

syringe opinion opinion opinion on SIS’s SIS’s

Service;

SIS.

95%Confidence

Public Public Public Evaluation opening opening vending (NEP), regarding about about Exploring stakeholder perceptions Impact implications and acceptability exchange acceptance attendance feasibility police =

Utilisateurs

Coroners =

95%CI

UDI

study, Ratio; study study,

Columbia study

sampling

survey

Services; sample

Odds

British

=

Qualitative Descriptive, prospective, repeated cross-sectional study survey Qualitative Evaluative Prospective without Prospective repeated cross-sectional study, sample Ajusted

Injection

BCCS =

aOR

207

Services;

Supervised Ratio;

residents: residents: =

business

UDI minister

SIS

Odds

Local 40 2411 16 Local +1 +9profession- nals 1090 operators: 540–326 business operators: 269–210 540; Survival =

to

OR

Injecting; of

or

Item; and in

Exposure MSIC

in

and King the

and

direct

operators operators, field sample

interaction

adult (Mexico) of

of the

key makers cohort

local

residents PWID had Supervised

stakeholders

Applicable drug

evaluate

Of

to business Ontario Cross personnel policy the business Tijuana indirect Key SEOSI Representative sample PWID, Random Sample who population with local around Sydney residents

Not

=

NAI Study.

Cohort

Evaluation

2007 2008 2009

Users

Care

2005

2007 al., al., al.,

al.,

et et 2007 al., et AIDS

Drug

Applicable;

et = Scientific

et

=

Not

=

Philbin DeBeck Cruz O’Shea, Salmon Thein NA ACCESS Injection SEOSI

62 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68

studies (DeBeck et al., 2012; Green et al., 2004; Tyndall et al., 3.3. The impact of SISs on overdose-induced mortality and

2006b). Among the 32 articles about cohort studies, 94% (n = 30) morbidity

were performed in Vancouver, 3% (n = 1) in Sydney, and 3% (n = 1)

in Barcelona. Seven studies evaluated whether SISs successfully reduced

Other non-cohort investigations consisted of 7 exhaustive pop- harm among SIS users (Kerr et al., 2006b, 2007b; Marshall et al.,

ulation studies [4 descriptive studies (Fry, 2002; Kimber et al., 2011; Milloy et al., 2008a, 2008b; Salmon et al., 2010; Van Beek

2003; Tyndall et al., 2006a; Van Beek et al., 2004), 3 descriptive et al., 2004). In the different studies, no death by overdose was ever

and analytical studies (Kimber et al., 2008b; Salmon et al., 2009a, reported within the SISs in which this parameter was evaluated

2009b)], 13 articles about qualitative studies (Fairbairn et al., 2008; (Kerr et al., 2006b; Milloy et al., 2008b; Van Beek et al., 2004). In

Fast et al., 2008; Jozaghi and Andresen, 2013; Kerr et al., 2007b; Vancouver, SIS implementation led to a 35% decrease in the num-

McNeil et al., 2013; O’Shea, 2007; Philbin et al., 2009; Small et al., ber of lethal overdoses in the vicinity of the SIS (Marshall et al.,

2009, 2008, 2012, 2011a, 2011b; Watson et al., 2012), 4 cross- 2011); thus, it was evaluated that between 2 and 12 cases of lethal

sectional studies (Dubois-Arber et al., 2008; Navarro and Leonard, overdose might have been avoided each year (Milloy et al., 2008b).

2004; Salmon et al., 2007; Thein et al., 2005), 3 surveys (Cruz In Sydney, the number of calls for ambulances related to overdose

et al., 2007; Kral et al., 2010; Van Beek and Gilmour, 2000), 3 was 68% lower during the operational hours of the SIS (Salmon et al.,

evaluative studies (Freeman et al., 2005; Kerr et al., 2006a; Wood 2010; Van Beek et al., 2004).

et al., 2006a), 5 evaluative experimental studies (Kimber and Dolan,

2007; Marshall et al., 2011; Salmon et al., 2010; Small et al., 2011b; 3.4. The impact of SISs on injection behaviors and their

Wood et al., 2004), 1 meta-analysis (Milloy and Wood, 2009), 1 consequences

case-control study (Wood et al., 2005b), 2 mathematical model-

ing studies (Pinkerton, 2011, 2010), 3 cost-benefit/effectiveness Eight studies addressed the reduction in other harms, especially

studies (Andresen and Boyd, 2010; Bayoumi and Zaric, 2008; syringe sharing during injection (Fast et al., 2008; Kerr et al., 2005c;

Jozaghi et al., 2013), and 1 simulation study (Milloy et al., Milloy and Wood, 2009; Salmon et al., 2009a; Stoltz et al., 2007b;

2008b). Wood et al., 2005b, 2005d, 2008). Studies conducted in Vancou-

Concerning the qualitative assessment of each study using the ver and Sydney showed that the regular use of SISs was associated

STROBE and CHEERS scales, the final score is reported in Table 1. with decreased syringe sharing (aOR = 0.30, 95%CI = [0.11–0.82])

This score was calculated from the sum of the applicable items (Kerr et al., 2005c), syringe reuse (aOR = 2.04, 95%CI = [1.38–3.01]),

for each study. The number of applicable items for each study can and public-space injection (aOR = 2.79, 95%CI = [1.93–3.87]) (Stoltz

be found in the denominator. The details of each evaluation are et al., 2007b). In a meta-analysis, Wood and Milloy estimated that

available in the supplementary material. Twenty-two studies were frequent use of SISs was associated with a 69% reduced likelihood

not evaluated: 13 were qualitative studies, 6 were experimental of syringe sharing (Milloy and Wood, 2009). The main injection-

studies, 2 were mathematical modeling studies and 1 was a meta- related issues reported by PWID were difficulty finding a vein, the

analysis. infectious aftermath of injections, and lack of education on safer

injection practices (Fast et al., 2008; Salmon et al., 2009a). Concomi-

tantly, regular SIS use fostered the use of sterile injection materials

3.2. Description of SIS users

and the elimination of soiled materials (Fast et al., 2008; Stoltz et al.,

2007b) and was associated with more frequent requests for edu-

We identified 14 articles that aimed to depict the profile of the

cation on safer injection practices (aOR = 1.47, 95%CI = [1.22–1.77])

most frequent SIS users. Eight of these studies were performed

(Wood et al., 2008).

in a SIS in Vancouver (Hadland et al., 2014; Reddon et al., 2011;

Richardson et al., 2008; Tyndall et al., 2006a, 2006b; Wood et al.,

3.5. The impact of SISs on reducing drug-related harms

2006c, 2005a, 2005c), while the others were performed in SISs in

Sydney (Kimber et al., 2008a, 2003; Salmon et al., 2009b; Stoltz

We found 6 studies that addressed this issue (Lloyd-Smith et al.,

et al., 2007a), Geneva (Dubois-Arber et al., 2008), Madrid and

2010, 2009, 2008; Marshall et al., 2009; Small et al., 2009, 2008).

Barcelona (Bravo et al., 2009).

All of the studies were sourced from the Vancouver cohort of SIS

In these studies, it was found that the majority of SIS users

users. There was no direct finding that SIS use induced a decrease in

were male, ranging from 30 to 35 years of age (Dubois-Arber et al.,

viral transmission. However, SIS use was associated with increased

2008; Kimber et al., 2003; Tyndall et al., 2006a; Wood et al., 2006c),

condom use during intercourse (8% in 2 years) (Marshall et al.,

with frequent housing insecurity and unemployment (Kimber et al.,

2009). Moreover, approximately 25% of the SIS users received care

2003; Richardson et al., 2008) and with a previous history of incar-

for injection-related cutaneous lesions (Lloyd-Smith et al., 2009).

ceration. Resorting to prostitution was identified in 10–39% of

PWID reported that the SISs assessed, cared for and oriented them

users (Kimber et al., 2003; Wood et al., 2006c). The most frequent

quickly, efficaciously, and without any judgment (Small et al., 2009,

drugs used were, in descending order, heroin, cocaine, opiates, 2008).

, and their derivatives (Kimber et al., 2003; Tyndall

et al., 2006a). In Vancouver, compared with other PWID, SIS users

3.6. The impact of SISs on access to addiction treatment programs

exhibited more episodes of overdose (OR = 2.7, 95%CI = [1.2–6.1])

and a higher frequency of daily drug injection (heroin: OR = 2.1,

This issue was assessed in 5 studies, among which 4 were

95%CI = [1.3–3.2]), cocaine: OR = 1.6, 95%CI = [1.1–2.5]) and of pub-

cohort studies from the Vancouver team and 1 was an exhaus-

lic injecting (OR = 2.6, 95%CI = [1.7–3.9]) before the opening of the

tive population study in Sydney. These publications stated that SIS

SIS (Wood et al., 2005c). Eighty-eight percent of SIS users were

attendance was associated with a global increase in diverse types of

seropositive for HCV (Wood et al., 2005a), and between 2% (Salmon

dependence care, i.e., referral to an addiction treatment center, ini-

et al., 2009b) and 30% (Wood et al., 2005c) of them were positive for

tiation of a detoxification program (OR = 1.32, 95%CI = [1.11–1.58];

HIV. For these PWID, syringe sharing was more regular before SIS

p = 0.002 (Wood et al., 2007)), and initiation of methadone ther-

use (OR = 2.13, 95%CI = [1.49–3.06])(Tyndall et al., 2006b) and was

apy (aHR = 1.57, 95%CI = [1.02–2.40; DeBeck et al., 2011; Kimber

a factor associated with these blood-transmissible viral infections

et al., 2008b; Milloy et al., 2010; Wood et al., 2007, 2006d). Approx-

(aOR = 1.8, 95%CI = [1.1–2.9]) (Wood et al., 2005a).

imately 20% of PWID were interested in joining a dependence care

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 63

program (Milloy et al., 2010; Wood et al., 2006d), and in Syd- 3.10. Medico-economic assessment of SISs

ney’s SIS, 25% of the interested subjects started such a program

(Kimber et al., 2008b). Among the PWID who used the Vancouver Four studies were performed to assess whether the SIS was a

SIS, 18% secondarily engaged in a detoxification program (Wood cost-saving system. All of them were carried out on the Vancouver

et al., 2006d), 57% started an addiction treatment, and 23% stopped SIS (Andresen and Boyd, 2010; Bayoumi and Zaric, 2008; Pinkerton,

injecting drugs (DeBeck et al., 2011). 2011, 2010). The authors calculated that the SIS could prevent 5–35

new HIV infections (Andresen and Boyd, 2010; Pinkerton, 2011)

and 3 deaths by overdose per year (Andresen and Boyd, 2010).

3.7. The impact of SISs on the nuisance induced by drug use in

Over 10 years, this prevention would represent a cost savings of

public spaces

$14 million, a gain of 920 years of life, and an avoidance of 1191

new HIV infections and 54 new HCV infections (Bayoumi and Zaric,

Six studies addressed these questions, of which 4 were per-

2008). Similarly, a study that used mathematical modeling found

formed in the Vancouver SIS (McKnight et al., 2007; Petrar et al.,

that opening a SIS in Montreal may be viable in terms of the cost-

2007; Stoltz et al., 2007b; Wood et al., 2004) and 2 in the Sydney

benefit and cost-effectiveness (Jozaghi et al., 2013).

SIS (Salmon et al., 2007; Thein et al., 2005). In Wood et al. (2004),

the number of syringes dropped in the hereabouts of the Vancou-

3.11. The opinion of PWID on SISs

ver SIS was counted and compared before and after the SIS opened.

After the SIS was opened, the authors found a reduction in the daily

Fifteen surveys aimed to evaluate the opinion of PWID on the

mean number of PWID injecting in public (4.3, IQR = [4.0–4.3] vs. 2.4

pros and cons of SISs in numerous cities: Vancouver (DeBeck et al.,

IQR = [1.5–3.0]; p = 0.022), syringes dropped (11.5, IQR = [7.3–14.3]

2011; Fairbairn et al., 2008; Jozaghi and Andresen, 2013; McNeil

vs. 5.3, IQR = [3.0–8.0]; p = 0.010) and injection-related lit-

et al., 2013; Petrar et al., 2007; Small et al., 2012, 2011a, 2011b;

ter (601.7, IQR = [490.0–830.3] vs. 305.3, IQR = [246.3–387.0];

Wood et al., 2003), Sydney (Kimber and Dolan, 2007; Van Beek

p = 0.014).

and Gilmour, 2000), Ottawa (Navarro and Leonard, 2004), Mon-

The other studies were surveys carried out among PWID in

treal (Green et al., 2004), Melbourne (Fry, 2002) and San Francisco

Vancouver (McKnight et al., 2007; Petrar et al., 2007; Stoltz et al.,

(Kral et al., 2010). Before the opening of the first SISs in Canada and

2007b) or among non-drug users who lived or worked in the vicin-

Australia, between 54% and 89% of the local PWID declared that they

ity of the SIS in Sydney (Salmon et al., 2007; Thein et al., 2005).

were willing to use such services (Fry, 2002; Van Beek and Gilmour,

Between the periods before and after the opening of the Syd-

2000). One survey found that 72% of the same PWID interviewed

ney SIS, this population noted less public injection (residents: 33%

actually visited the SIS (DeBeck et al., 2012). The main factors asso-

vs. 19%, p < 0.01; business operators: 38% vs. 28%, p < 0.03), less

ciated with visiting the SIS were the desire to inject safely and

syringes dropped (residents: 67% vs. 40%; business operators: 72%

quietly, the desire to avoid public spaces, previous episodes of over-

vs. 57%, p < 0.01) and less complaints about PWID nuisances, but no

dose, and the need for help to inject (Fry, 2002; Green et al., 2004;

change in the number of drug deals (residents: 28% vs. 26%, p < 0.80;

Van Beek and Gilmour, 2000). The main reasons reported for not

business operators: 33% vs. 28%, p < 0.26) (Salmon et al., 2007).

visiting the SIS were the prohibitions against sharing drugs and

In Vancouver, SIS attendance was associated with a reduction in

helping other PWID inject drugs within the SIS (Fry, 2002; Van Beek

self-declared public drug injecting (aOR = 2.79, 95%CI = [1.93–3.87])

and Gilmour, 2000).

and syringe dropping (aOR = 2.13, 95%CI = [1.47–3.09]) (Petrar et al.,

Seven surveys were published regarding the opinions of PWID

2007; Stoltz et al., 2007b).

on SISs (DeBeck et al., 2012; Fairbairn et al., 2008; McNeil et al.,

2013; Petrar et al., 2007; Small et al., 2012, 2011a, 2011b). Approx-

imately 75% of the PWID in Vancouver reported that using the SIS

3.8. The impact of SISs on local drug-related crime, violence, and

trafficking induced positive changes in their behaviors, notably in terms of

public nuisance and safe injection practices (Petrar et al., 2007).

Qualitative studies in Vancouver revealed that their motivation for

Four studies evaluated this issue in Vancouver (Milloy et al.,

using the SIS were similar before and after visiting the SIS, i.e., to

2009; Wood et al., 2006a) and Sydney (Fitzgerald et al., 2010;

inject in safe and quiet conditions without suffering violence or

Freeman et al., 2005), among which 3 included local police data

having to share drugs with others and to avoid the police (Fairbairn

(Fitzgerald et al., 2010; Freeman et al., 2005; Wood et al., 2006a).

et al., 2008; McNeil et al., 2013; Small et al., 2012, 2011a). The main

In Vancouver, no increase in crime, violence or drug trafficking

concerns of PWID concerning the SIS were the length of the waiting

around the SIS was found after the opening of the SIS (Wood et al.,

time to access the SIS, the prohibition of sharing drugs and helping

2006a). In Sydney, compared to the other cities, data collected

others inject, the suspensions of access in cases of non-compliance

over a period of 10 years also revealed no increase in offenses

with the rules, their distance from the SIS, and the presence of

related to the trafficking or consumption of drugs in the areas

police in the surrounding area (Kimber and Dolan, 2007; Petrar

that surrounded the SIS (Fitzgerald et al., 2010; Freeman et al.,

2005). et al., 2007; Small et al., 2011a).

3.12. The impact of SISs on the opinions of local residents and

3.9. Impact of SISs on the amount of local PWID police

Two studies performed in the Vancouver SIS addressed whether Seven surveys sought the opinions of local residents, police and

the SIS induced an increase in the number of local PWID (Kerr et al., professionals in the drug field (Cruz et al., 2007; DeBeck et al., 2008;

2007c, 2006a). These studies reported that 25 months after the O’Shea, 2007; Philbin et al., 2009; Salmon et al., 2007; Thein et al.,

SIS opened, there was no increase in the local number of PWID 2005; Watson et al., 2012). Although there was no SIS in Ontario,

(Kerr et al., 2007c), no decrease in the number of PWID who started 60% of the local population favored the existence of an SIS (Cruz

methadone therapy (11% vs. 7%), and no increase in relapse rates et al., 2007), whereas the police forces in Toronto and Ottawa pre-

(17% vs. 20%; Kerr et al., 2006a). Nevertheless, the opening of the dominantly opposed SISs (Watson et al., 2012). In Sydney, two

SIS did not reduce the number of PWID who injected drugs (17% vs. random sample studies found that more than 70% of the local resi-

15%; Kerr et al., 2006a). dents and 58% of the companies located around the SIS were in

64 C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68

favor of the SIS (Thein et al., 2005) and deemed that there was less 2014; Pinkerton, 2011, 2010). Although Des Jarlais discussed the

drug use and syringe waste in public places (Salmon et al., 2007). importance of achievable gains, he agreed that the SIS of Vancouver

However, a majority of the companies and residents nonetheless would continue to be cost-effective (Des Jarlais et al., 2008).

thought that the SIS contributed to a negative image of the district, Some critics have argued that SISs, by promoting safer and thus

fostered drug use, attracted drug users and dealers, and increased more comfortable injection conditions, might foster risk-taking in

crime and insecurity (Salmon et al., 2007). PWID and thus expose them to increased risks of overdose (Selby

et al., 2007). However, the global rate of overdoses in SISs was found

to be very low (Kerr et al., 2006b; Van Beek et al., 2004), and the

4. Discussion outcomes of overdose cases were improved due to the presence of

healthcare workers (Kerr et al., 2006b, 2007b). In addition, different

The aim of this review was to depict the currently available evi- surveys that evaluated the number of overdoses have shown that

dence regarding the positive and negative consequences of SISs. the rates of overdoses did not increase after the implementation of

Several literature reviews have evaluated the multiple impacts of SISs (Marshall et al., 2011; Milloy et al., 2008a; Salmon et al., 2010).

SISs on PWID or on their local environment (Hyshka et al., 2013; However, no similar observation was found in our results con-

Kelly and Conigrave, 2002; Kerr et al., 2007a; Semaan et al., 2011; cerning the European SISs. A German departmental report found

Tyndall, 2003; Wood et al., 2006b). However, the present review the same results, but it has not been referenced in any database

is the first to systematically embrace the full scope of SIS-related (Poschadel et al., 2003).

issues using a reproducible keyword algorithm research. SISs were also implemented to reduce the problems induced by

The studies that depict the profile of SIS users were performed drug injection in public spaces. The Canadian studies (McKnight

internationally, and their results were quite homogeneous among et al., 2007; Wood et al., 2004) found that SISs contributed to a sig-

the different countries. PWID using SISs globally exhibited a similar nificant reduction of drug injection in public spaces. This reduction

profile of social precariousness and poor life conditions, which sug- was congruent with the results of surveys of local residents in Syd-

gests that SISs were successful in attracting the most marginalized ney (Cruz et al., 2007; Salmon et al., 2007) and with measures of

fringes of PWID. Nonetheless, some experts (Noël et al., 2009) and the amount of waste resulting from drug injection in public spaces

one study (McNeil et al., 2013) have noted that because there was (Wood et al., 2004). In our results, we found no European studies

no assistance for drug injection in SISs, PWID who are unable to on this issue; however, European studies have actually been per-

self-inject, especially those whose conditions are too deteriorated, formed and have found similar results (Hedrich, 2004; Kemmesies,

would be unable to frequent SISs. Moreover, because most SISs do 1999). In some European SISs, e.g., in Switzerland and Germany,

not accept individuals under 18 or pregnant women, it remains however, the reduction in the amount of injection-related waste

difficult to conclude anything regarding these specific subpopula- in the areas surrounding the SIS also resulted from active collec-

tions, which are particularly vulnerable and require specific care tion by both SIS users and SIS personnel (Benninghoff et al., 2003;

and support. These conditions of accessibility have been discussed Schu et al., 2005). Moreover, it has been noted that external fac-

among the staff of a Swiss SIS (Solai et al., 2006). tors without any link to SISs could also reduce drug use in public

Similarly ubiquitous and homogeneous were the findings that spaces, e.g., factors related to local homeless housing programs

SISs allowed safer injection conditions and promoted enhanced (Noël et al., 2009), local police surveillance, or local policy changes

health education among PWID regarding injection techniques and (Government of Canada, 2008). Therefore, the direct impact that

asepsis rules. Given the high rates of HIV and HCV infections in SISs may have on reducing drug injection in public spaces was

PWID, the reduction of syringe sharing in PWID using SISs indicates sometimes difficult to assess because the use of drugs in pub-

that SISs are effective tools against the spread of these epidemics. lic spaces results from numerous factors that remain difficult to

With the aim of promoting safer injection behaviors, SISs proposed control within scientific studies. Furthermore, local or contextual

or directed PWID to specific health and social services (Hedrich, features related to the function of the SIS may also influence out-

2004). Because these services varied significantly between SISs, it door drug injection practices. For example, the rates of outdoor

was difficult to globally compare and evaluate this subject. From drug injection increase with the average wait to access the SIS

analyzing different studies, it appeared that most PWID had used (Benninghoff et al., 2003; Small et al., 2011b). Consequently, if SISs

such services. However, the benefits of social services remained can reduce injection practices in public spaces, this impact might

insufficiently assessed within the different SISs. Most SISs were largely depend on their accessibility (EMCDDA, 2009; Hedrich,

linked to addiction care services, which were found to facilitate 2004).

the start of addiction care among PWID. However, a proportion Another fear that emerged with the opening of SISs was the

of PWID who attended SISs were already undergoing treatment increase of drug trafficking and drug-related crime in the direct

with methadone, although they continued to self-inject drugs. This vicinity of the SIS. This effect was not highlighted in the studies

finding suggests that SISs and opiate replacement therapies are dif- found in our review, which were performed in Canadian and Aus-

ferent, albeit complementary, measures for harm reduction among tralian SISs (Fitzgerald et al., 2010; Freeman et al., 2005; Milloy

PWID. et al., 2009; Wood et al., 2006a). Furthermore, no European data

Moreover, it was feared that SISs might foster the initiation were found in our review, whereas the European report on drug

of new users into intravenous drug use, but no study found any consumption rooms cited unreferenced studies that found no

increase in the total number of local PWID, irrespective of the SIS increase in acquisitive crime in Swiss or Dutch SISs (Hedrich et al.,

studied. Equally univocal was the global satisfaction with the use 2010). A few European studies reported small-scale drug traffic-

of SISs among PWID in the different surveys (Jozaghi and Andresen, king in the immediate vicinity of the SISs (Hedrich, 2004). However,

2013; Kimber and Dolan, 2007; Petrar et al., 2007; Small et al., 2012, as noted by the European report, “As many rooms are deliber-

2011a). However, most of the surveys were performed among SIS ately located near places where illicit drugs are sold, it is difficult to

users, which may not reflect the overall population of PWID. No claim that the existence of such rooms leads per se to drug dealing”

survey investigated the subjective assessment of SISs among PWID (Hedrich, 2004). Moreover, there are numerous external factors

who no longer attended SISs; this population may exhibit different that may influence drug trafficking and criminality. In Vancouver,

opinions on these facilities. On a medico-economic level, stud- for instance, the SIS and police services work in close collaboration,

ies have demonstrated that SISs are economically cost-effective which may explain why there was no increase in drug traffic-

(Andresen and Boyd, 2010; Bayoumi and Zaric, 2008; Hadland et al., king in the related study (DeBeck et al., 2008; Hedrich, 2004). This

C. Potier et al. / Drug and Alcohol Dependence 145 (2014) 48–68 65

collaboration seems important for the effect on the level of the in Europe to counterbalance the disproportion of the currently

criminality around the SIS (Hedrich et al., 2010). The surveys among available data among centers and countries; thereby, if SISs con-

local residents have all noted that numerous prejudices against tinue to develop in Europe, their scientific legacy will be based on

drug users accompanied the implementation of a SIS within the local evidence. Lastly, the well-known bias of “socially desirable

neighborhood and that these beliefs might last even after the imple- answers” in surveys of PWID may limit the scope of the survey

mentation of the SIS. Consequently, it has been recommended that results on several subjects, e.g., overdose (Milloy et al., 2008a) and

any implementation of a new SIS be preceded by a campaign that syringe sharing (Stoltz et al., 2007b). However, studies with data

aims to inform and educate people living in the vicinity of the SIS sources other than self-reports found approximately the same con-

(Hedrich, 2004; INSERM, 2010). It should be demonstrated that clusions as the surveys. Consequently, this bias most likely had a

such preparation for the implementation of a SIS in a specific district weak impact on the overall findings of this review.

is highly effective in facilitating its acceptance by local residents and In conclusion, despite significant operating differences, SISs

police services. In addition, the implementation of a SIS is depend- ubiquitously and effectively succeeded in attracting the most

ent on the political prejudgment of a country or city, which may be marginalized PWID, i.e., those who generally have not joined any

a hindrance to the development of SISs. The example of the SIS in already existing care system. However, some parts of this popu-

Vancouver, where the accumulation of scientific evidence has had lation still do not have access to the majority of SISs, especially

little influence on the elected political party (Hyshka et al., 2013; people under the age of 18, pregnant women, and people who can-

Small, 2010), reflects the controversy of SISs (Keller, 2008; Picard, not self-inject. Their interest in SISs remains to be demonstrated,

2008) and the need for local and national political support. and further SIS developments are expected to address these sub-

This systematic literature review on SISs has several limitations. populations.

First, encompassing the entire scope of the relevant articles con- SISs were found to provide numerous benefits to PWID: safer

cerning SISs was complex because there are many synonymous injection conditions and safe injection equipment, efficacious

terms referring to SISs in the international literature. To date, no overdose management, injection technique education, of blood-

consensual appellation has been defined, which explains why we transmissible infection prevention, and enhanced connections with

used such a complex keyword algorithm to include the most com- addiction and social services. Their interventions are deemed effi-

mon appellations in the results. Despite this, a few articles that refer cacious because they induce positive changes in risk behaviors of

to SISs using more unusual terms might have been missed in this PWID.

systematic review. Another limitation of the present work is the Moreover, SISs generate public benefits such as a decrease in

presence of important differences in the functioning of SISs around the number of PWID injecting in public and a reduction of dropped

the world and gaps in the cultural and political contexts between syringes in public places. Contrary to what was feared, SISs do not

countries. This fact could introduce important variations in what promote drug use and do not increase crime or drug trafficking

was synthesized with respect to the different studies selected or the number of PWID. In addition, they seem to be economi-

herein. cally cost-effective. Thus, SISs can be considered effective measures

Moreover, the types and designs of the studies themselves were complementary to other harm reduction interventions.

highly variable, depending on the question addressed. Notably,

there were significant disproportions in the quantity and fea- Role of the funding source

tures of the data published on the different active SISs around the

world. Although most SISs are currently located in Europe (Hedrich Nothing declared.

et al., 2010), the majority of the systematically identified publica-

tions were related to the Canadian or Australian SISs, which have Contributors

received significant means to evaluate their structures. Some sub-

jects were addressed ubiquitously, i.e., the depiction of profiles of B. Rolland and C. Potier designed the study. C. Potier, B. Rolland

PWID, the effect of safety and hygienic conditions for injection, sat- and V. Laprevote conducted the literature searches and summaries

isfaction surveys among PWID and residents, and the effects of the of previous related work. C. Potier and B. Rolland wrote the first

SIS on overdoses, injection in public areas and crime. Conversely, draft of the manuscript. F. Dubois-Arber, V. Laprevote and O. Cot-

the imbalance in studies was particularly notable regarding other tencin corrected the first draft of the manuscript. All authors

subjects, i.e., the morbidity secondary to injection-related prob- contributed to and have approved the final manuscript.

lems and the economic efficiency of the SISs. However, there are

European data on these subjects because they were mentioned in Conflict of interest

previous comprehensive reviews issued by different official institu-

tions (EMCDDA, 2009; Hedrich, 2004; Hedrich et al., 2010; INSERM, No conflict declared.

2010; Joseph Rowntree Foundation, 2006; Noël et al., 2009). The

conclusions of these reports were globally similar to those we found Appendix A. Supplementary data

in our review regarding each of the different questions. Regard-

less, if many investigations were performed in European SISs, the Supplementary data associated with this article can be found,

results of these investigations were not found in the databases used in the online version, at http://dx.doi.org/10.1016/j.drugalcdep.

for the present review, although these databases are among the 2014.10.012.

most commonly used for literature research. For example, 40 Euro-

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