Low Utilisation of Diabetes Medicines in Iran, Despite Their Affordability (2000–2012): a Time-Series and Benchmarking Study
Total Page:16
File Type:pdf, Size:1020Kb
Open Access Research BMJ Open: first published as 10.1136/bmjopen-2014-005859 on 16 October 2014. Downloaded from Low utilisation of diabetes medicines in Iran, despite their affordability (2000–2012): a time-series and benchmarking study Amir Sarayani,1 Arash Rashidian,2,3 Kheirollah Gholami4 To cite: Sarayani A, ABSTRACT Strengths and limitations of this study Rashidian A, Gholami K. Low Objectives: Diabetes is a major public health concern utilisation of diabetes worldwide, particularly in low-income and middle-income ▪ medicines in Iran, despite To the best of our knowledge, this is the first countries (LMICs). Limited data exist on the status of their affordability (2000– study to evaluate the pattern of utilisation and 2012): a time-series and access to diabetes medicines in LMICs. We assessed the affordability of diabetes drugs in a low-income benchmarking study. BMJ utilisation and affordability of diabetes medicines in Iran as or middle-income country over a period of time. Open 2014;4:e005859. a middle-income country. ▪ We used data from OECD countries to assess the doi:10.1136/bmjopen-2014- Design: We used a retrospective time-series design adequacy of utilisation in Iran. 005859 (2000–2012) and assessed national diabetes medicines’ ▪ Our findings showed that utilisation of diabetes utilisation using pharmaceuticals wholesale data. drugs does not seem to be adequate. Although ▸ Prepublication history for Methods: We calculated defined daily dose the affordability of essential diabetes medicines this paper is available online. consumptions per population days (DDDs/1000 is achieved, optimising the pattern of use To view these files please inhabitants/day; DIDs) indicator. Findings were requires screening for undiagnosed patients and visit the journal online benchmarked with data from Organization for Economic improving management of diagnosed cases. (http://dx.doi.org/10.1136/ Co-operation and Development (OECD) countries. We also ▪ National wholesale data were used to estimate bmjopen-2014-005859). employed Drug Utilization-90% (DU-90) method to drug utilisation; however, these data may not Received 4 June 2014 compare DU-90s with the Essential Medicines List reflect the real drug consumption by patients. Revised 19 August 2014 published by the WHO. We measured affordability using Accepted 21 August 2014 number of minimum daily wage required to purchase a 12 http://bmjopen.bmj.com/ treatment course for 1 month. prevalence of 8.3% in 2011, while approxi- Results: Diabetes medicines’ consumption increased mately 80% of patients with diabetes reside from 4.47 to 33.54 DIDs. The benchmarking showed that in low-income and middle-income coun- 2 medicines’ utilisation in Iran in 2011 was only 54% of the tries. Proper management of diabetes con- median DIDs of 22 OECD countries. Oral hypoglycaemic sists of interventions targeting the patient’s agents consisted over 80% of use throughout the study diet, exercise status and prescribing medi- period. Regular and isophane insulin (NPH), cines (insulin and oral hypoglycaemic glibenclamide, metformin and gliclazide were the DU-90 agents).3 Currently, medicines are an essen- drugs in 2012. Metformin, glibenclamide and regular/NPH tial part of diabetes management guidelines on September 28, 2021 by guest. Protected copyright. insulin combination therapy were affordable throughout for most patients. Insulin would be started the study period (∼0.4, ∼0.1, ∼0.3 of minimum daily readily after diagnosis of type-1 diabetes and wage, respectively). While the affordability of novel insulin preparations improved over time, they were still would be added to the therapeutic regimen unaffordable in 2012. of type-2 diabetes as required. In addition, Conclusions: The utilisation of diabetes medicines was oral hypoglycaemic agents, for example, met- relatively low, perhaps due to underdiagnosis and formin, are usually initiated alongside life- inadequate management of patients with diabetes. This style modifications at diagnosis of type-2 had occurred despite affordability of essential diabetes diabetes.4 Thus, appropriate utilisation of medicines in Iran. Appropriate policies are required to diabetes medicines should be high on the address the underutilisation of diabetes medicines in Iran. agenda for health policymakers.5 Previous studies have reported different util- isation patterns of diabetes medicines in differ- For numbered affiliations see 6–8 et al6 end of article. ent countries. For example, Melander analysed data from 10 European countries INTRODUCTION (1994–2003) and identified an increasing Correspondence to ’ Dr Arash Rashidian; Diabetes is a major public health concern trend in diabetes medicines consumption. [email protected] worldwide, with an estimated global They also observed large differences in Sarayani A, et al. BMJ Open 2014;4:e005859. doi:10.1136/bmjopen-2014-005859 1 Open Access BMJ Open: first published as 10.1136/bmjopen-2014-005859 on 16 October 2014. Downloaded from utilisation patterns among these countries, and concluded METHODS that these might have occurred due to the differences in Design diabetes screening and management patterns in those A retrospective time-series design was used to investigate countries.6 Few reports exist on the affordability of medi- the trends of utilisation and affordability for diabetes cines and the utilisation patterns of diabetes medicines in medicines in Iran (2000–2012). We benchmarked the low-income and middle-income countries where the rate of drug utilisation with the most recent available burden of diabetes is believed to be more significant than data from 22 countries in 2011. high-income countries.29National studies in Iran, an upper-middle-income country, have estimated a significant National data sources prevalence of diabetes in the country (7.7% in 2005 and Annual wholesale data were obtained from Iran’s Food 8.7% in 2007), of which over 45% were undiagnosed and Drug Organization. The data are produced based cases.10 11 Moreover, a meta-analysis reported that the on the sales’ reports of wholesale companies to commu- prevalence of diabetes in Iran is increasing by 0.4% annu- nity and inpatient pharmacies all over the country and ally.12 Still, very few reports exist on the utilisation patterns has been available as an electronic medium since 2000. of diabetes medicines in order to show the current situ- Each pharmaceutical product (medicinal dosage forms) ation of diabetes pharmacotherapy in the country. is identified with a generic name and a unique code in the database and can be linked to the manufacturer or Health and pharmaceutical system in Iran import company, the wholesale company, the number of The healthcare system in Iran is primarily based on a gov- sold items and their total retail price. Diabetes medi- ernment funded primary healthcare system and social cines available on the market during the study period health insurance plans that facilitate access to secondary were identified based on consultation with experts and and tertiary care. The private sector is the main provider the National Drug List. Several examinations were of ambulatory care in urban areas.13 In 2010, social carried out to assess the quality of the data. Generic healthcare insurance covered 84% of the population.14 codes were set as the main standard for accuracy exam- Insurance organisations’ reimbursement policies for ination. We looked for discrepancies in recorded medicines follow a general rule: covering 90% of generic—or brand-generic codes, dosage forms, produ- inpatient and 70% of outpatient costs if the provider has cer/importer and wholesale companies’ data. To stand- a contract with the insurance organisation.15 Almost all ardise pharmaceutical consumption data per inhabitant, community and hospital pharmacies have contracts with we obtained annual population figures from the major insurance organisations and the lowest priced Statistics Center of Iran. generic product is usually set for reimbursement pur- poses. This means that the users might pay more than the International data source 10% (inpatient care) or 30% (outpatient care) expected We collected data on diabetes medicines utilisation in 22 http://bmjopen.bmj.com/ copayments at the time of use. Hence, major concerns countries of the Organization for Economic Co- exist among health policymakers regarding out of pocket operation and Development (OECD) via the Health expenditures for health services.16 Still, it has been Data: Pharmaceutical market database.22 argued that adequate affordability of medicines has been achieved in Iran.17 18 Implementation of a generic-based Evaluating utilisation patterns in Iran pharmaceutical policy including a highly regulated The Anatomical Therapeutic Classification/Defined National Drug List and medicines pricing systems may Daily Dose (ATC/DDD) methodology was used to stand- have contributed to the assumed adequacy of access to ardise the raw sales data. The latest version of the ATC/ on September 28, 2021 by guest. Protected copyright. medicines in Iran.19 20 Since 2001, international compan- DDD guideline (2013) was retrieved from the website of ies (brand or generic products) became more involved in the WHO Collaborating Centre for Drug Statistics the local pharmaceutical market and the market size Methodology.23 In the present study, the ATC codes of expanded from US$661 million in 2003 (of which 20.5% A10 group were used to standardise diabetes medicines. were imported products) to over US$2.3 billion in 2008 We used second (all diabetes medicines), third (insulin (of which 33.6% were imported products).19 It is esti- or oral hypoglycaemic agents) and fifth (individual mated that the pharmaceutical market size in Iran would pharmaceutical substance) level of ATC classification be US$3.65 billion in 2013.21 for each data line recorded in the data set and the DDD quantities were entered respectively. To calculate Objectives the number of DDDs per 1000 inhabitants per day In the present study, we evaluated the trends of diabetes (DID), the following formula was used: (number of medicines’ utilisation in Iran during 2000–2012 using DDDs×1000)/(number of population×365).6 We sum- national pharmaceuticals wholesale data.