Yavuz, B.Ata, N.Oto, E.Katircioglu-Öztürk, D.Aytemir, K.Evranos, B.Koselerli, R.Ertugay, E.Burkan, A.Ertugay, E.Gale, C. P.Camm, A. J.Oto, A.2018-04-122018-04-1220171099-5129http://hdl.handle.net/11693/37156Aims: Although atrial fibrillation (AF) is increasingly common in developed countries, there is limited information regarding its demographics, co-morbidities, treatments and outcomes in the developing countries. We present the profile of the TuRkish Atrial Fibrillation (TRAF) cohort which provides real-life data about prevalence, incidence, comorbidities, treatment, healthcare utilization and outcomes associated with AF. Methods and results: The TRAF cohort was extracted from MEDULA, a health insurance database linking hospitals, general practitioners, pharmacies and outpatient clinics for almost 100% of the inhabitants of the country. The cohort includes 507 136 individuals with AF between 2008 and 2012 aged >18 years who survived the first 30 days following diagnosis. Of 507 136 subjects, there were 423 109 (83.4%) with non-valvular AF and 84 027 (16.6%) with valvular AF. The prevalence was 0.80% in non-valvular AF and 0.28% in valvular AF; in 2012 the incidence of non-valvular AF (0.17%) was higher than valvular AF (0.04%). All-cause mortality was 19.19% (97 368) and 11.47% (58 161) at 1-year after diagnosis of AF. There were 35 707 (7.04%) ischaemic stroke/TIA/thromboembolism at baseline and 34 871 (6.87%) during follow-up; 11 472 (2.26%) major haemorrhages at baseline and 10 183 (2.01%) during followup, and 44 116 (8.69%) hospitalizations during the follow-up. Conclusion: The TRAF cohort is the first population-based, whole-country cohort of AF epidemiology, quality of care and outcomes. It provides a unique opportunity to study the patterns, causes and impact of treatments on the incidence and outcomes of AF in a developing country. Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2017.EnglishAtrial fibrillationCHA2DS2VascIncidence of atrial fibrillationPopulation-based cohortAtrial fibrillationTransient ischemic attackThromboembolismQuality of careHemorrhageIschemic strokeEpidemiologyAmbulatory care facilitiesDemographyDeveloped countriesDeveloping countriesFollow-upHealth insurancePharmaciesPhysiciansDiagnosisMorbidityMortalityHealth care useTurkishArticle10.1093/europace/euw385