Non-Vitamin K Antagonist Oral Anticoagulants, Proton Pump
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Arrhythmias and sudden death Original research Heart: first published as 10.1136/heartjnl-2021-319332 on 2 August 2021. Downloaded from Non- vitamin K antagonist oral anticoagulants, proton pump inhibitors and gastrointestinal bleeds Joris Komen ,1,2 Anton Pottegård,3 Paul Hjemdahl,4 Aukje K Mantel- Teeuwisse,1 Björn Wettermark,5 Maja Hellfritzsch,3 J Hallas,3 Ron Herings,6 Lisa Smits,6 Thomas Forslund,4 Olaf Klungel1 ► Additional supplemental ABSTRACT An observational study from the USA showed material is published online Objective To evaluate if proton pump inhibitor (PPI) markedly reduced risks of UGIB associated with PPI only. To view, please visit the 6 journal online (http:// dx. doi. treatment reduces the risk of upper gastrointestinal use in patients treated with NOACs. In contrast, org/ 10. 1136/ heartjnl- 2021- bleeding (UGIB) in patients with atrial fibrillation the COMPASS trial showed no protective effect 319332). (AF) treated with non-vitamin K antagonist oral with respect to GI bleeding overall, while a subanal- anticoagulants (NOACs). ysis on gastroduodenal bleeding showed a clearly 1Clinical Pharmacology and Design We used a common protocol, common data 7 Pharmacoepidemiology, Utrecht reduced risk. However, this trial was in patients Institute of Pharmaceutical model approach to conduct a cohort study including with stable cardiovascular disease and peripheral Sciences, Utrecht University, patients with AF initiated on a NOAC in Stockholm, artery disease receiving a lower dose of rivaroxaban Utrecht, The Netherlands Denmark and the Netherlands from April 2011 until July 2 than in atrial fibrillation (AF) (5 mg two times per Department of Healthcare 2018. The outcome of interest was a UGIB diagnosed Development, Stockholm Region day). Public Healthcare Services in a secondary care inpatient setting. We used an In the absence of convincing results, the guide- Committee, Stockholm, Sweden inverse probability weighted (IPW) Poisson regression to 3 lines state that PPI treatment may be considered to Clinical Pharmacology and calculate incidence rate ratios (IRRs), contrasting PPI use reduce the risk of GIB, especially in those with a Pharmacy, Department of Public to no PPI use periods. Health, University of Southern history of GI bleeding or ulcer and patients requiring Results In 164 290 NOAC users with AF, providing 8 Denmark, Odense, Denmark concomitant use of (dual) antiplatelet therapy, a 4 272 570 years of follow- up and 39 938 years of PPI Department of Medicine, Solna, statement that was, however, removed in the most Karolinska Institute, Stockholm, exposure, 806 patients suffered a UGIB. After IPW, recent guidelines.9 As there is currently limited Sweden PPI use was associated with lower UGIB rates (IRR: 5 evidence from randomised studies regarding the Department of Pharmacy, 0.75; 95% CI: 0.59 to 0.95). On an absolute scale, Pharmacoepidemiology and effect of PPIs on UGIB in NOAC-treated patients the protective effect was modest, and was found to be Social Pharmacy, Uppsala with AF, observational data are the main source of University, Uppsala, Sweden largest in high-risk patients, classified as age 75–84 6 guidance for this clinically relevant topic. There- PHARMO Institute, Utrecht, The years (number needed to treat for 1 year (NNTY): 787), http://heart.bmj.com/ Netherlands age ≥85 years (NNTY: 667), HAS-BLED score ≥3 (NNTY: fore, the aim of the current study was to assess the 378) or on concomitant antiplatelet therapy (NNTY: 373). association between PPI use and UGIBs in patients Correspondence to Conclusion Concomitant treatment with a PPI in with AF treated with a NOAC in three Western Joris Komen, Utrecht University, European countries. Utrecht 3508 TC, The NOAC-treated patients with AF is associated with a Netherlands; j. j. komen@ uu. nl reduced risk of severe UGIB. This indicates that PPI cotreatment can be considered, in particular among the Received 11 March 2021 METHODS elderly patients, patients with a HAS- BLED score ≥3, Accepted 2 July 2021 on October 1, 2021 by guest. Protected copyright. and/or in patients on concomitant antiplatelet therapy. Database For this population- based cohort study, we used three different databases: the Swedish Healthcare Database in the Stockholm region (complete popula- tion, n=2.3 million), the nationwide Danish health INTRODUCTION registers (complete population, n=5.8 million) and Pooled results from clinical trials showed that the PHARMO Database (random sample from the treatment with non- vitamin K antagonist oral Dutch population, n=4 million). The databases anticoagulants (NOACs) significantly increased 10–12 the risk of upper gastrointestinal bleeding (UGIB) are described in detail elsewhere. All three compared with warfarin.1 Proton pump inhibitors databases contain prescription claims data from community pharmacies, registered by Anatom- © Author(s) (or their (PPIs) reduce gastric acid production and prevent employer(s)) 2021. Re- use ulcer recurrence.2 In patients on aspirin treat- ical Therapeutic Chemical codes, and all three permitted under CC BY- NC. No ment, which increases the risk of GIB,3 PPIs have databases contain medical diagnostic data from commercial re- use. See rights 4 secondary care, registered by 10th revision of the and permissions. Published been shown to reduce the risk of GIB. Therefore, by BMJ. PPI use is recommended for patients on aspirin International Statistical Classification of Diseases treatment with certain comorbidities and come- and Related Health Problems (ICD-10) codes. In To cite: Komen J, dications.5 Since clinical trials show an overall addition, the Stockholm database also contains Pottegård A, Hjemdahl P, et al. Heart Epub ahead of increased risk of UGIB associated with NOAC medical diagnostic data from primary care, also print: [please include Day treatment, it is hypothesised that cotreatment with registered by ICD-10 codes. We used a common Month Year]. doi:10.1136/ a PPI could decrease the risk of UGIB in NOAC protocol and a common data model to combine the heartjnl-2021-319332 users as well. data from the different databases. Komen J, et al. Heart 2021;0:1–6. doi:10.1136/heartjnl-2021-319332 1 Arrhythmias and sudden death Study population dyspepsia, abdominal pain, lower GI problems and other GI From each database, we included all patients dispensed a problems (see online supplemental table 1 for ICD-10 codes). Heart: first published as 10.1136/heartjnl-2021-319332 on 2 August 2021. Downloaded from NOAC with a known history of AF, defined by a registration As these comorbidities might be markers for an already present of the ICD-10 code I48 any time prior to or within 90 days UGIB, we added a 7- day lag period to the actual registration date after the first NOAC dispensing, to account for diagnostic lag.13 of the diagnosis, to avoid reverse causality in the assessment of Patients entered the cohort at the date of their first ever NOAC covariates. In addition, as these confounders might change over prescription (cohort entry date), and we included patients time, and affect both the risk of UGIB and the chance of PPI from April 2011 until July 2018. We considered a patient to prescription, we partitioned follow-up time into 91- day periods, be on continued NOAC treatment when the patient claimed a with the individual patient’s initial cohort entry date as starting prescription for a NOAC within 30 days after the calculated end point. We searched for registrations of these diagnosis codes in of the previous prescription (see online supplemental figure 1). the 3 years prior to the first day of the 91- day period. We defined We censored patients at an outcome of interest, at the calculated the time- varying comorbidities as acute if the code was regis- end of their last prescription, when they died, moved out of the tered in the 30 days prior to the first day, as current if it was region or database, or switched to warfarin treatment. Patients registered in the 30–90 days prior to the first day, as recent if it could re- enter the cohort after they stopped their treatment if was registered in the 90–365 days prior to the first day, and as restarting NOAC therapy, and follow- up was defined in a similar long- term if it was registered in the 365 days—3 years prior to manner after re- entering the cohort. All patients had to have at the first day. least 3 years of follow- up time prior to cohort entry, in order to The comedications assessed were aspirin, non- steroidal anti- adequately assess baseline characteristics. inflammatory drugs (NSAIDs), clopidogrel, other antiplatelets, oral corticosteroids, diuretics, beta blockers, calcium channel Exposure definition blockers, renin–angiotensin–aldosterone system inhibitors, During follow- up, patients were considered to be exposed to statins, oral antidiabetic drugs, insulins and antidepressants (see PPIs when they claimed a PPI prescription (see online supple- online supplemental table 1 for ATC codes). As comedications mental figure 1). They were considered exposed until the end may change over time, we used the same 91- day periods as for of the duration of their last consecutive PPI prescription. We the time- varying confounders. We looked for a prescription in considered PPI treatment to be consecutive if a new prescrip- the 180 days prior to the first day of the 91- day period. tion was claimed within the duration of the prior prescription, with another 30- day grace period added to account for irregular Statistical analysis fill patterns and minor non- compliance. We calculated the dura- We used descriptive statistics to present baseline characteris- tion of the prescription using the number of tablets dispensed, tics for each database. To describe PPI users and non-users, we thus assuming a one tablet a day dosing regimen. To avoid bias defined patients as users of a PPI if they received a PPI at some from reverse causality (ie, that patients receive a PPI because of point during follow- up.