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Risk Factors for Atrial Fibrillation in People With Type 1 Diabetes: An Observational Cohort Study of 36,258 Patients From the Swedish National Diabetes Registry

Journal article
Authors Sara Hallström
Aldina Pivodic
Annika Rosengren
Arndis Olafsdottir
Ann-Marie Svensson
Marcus Lind
Published in Diabetes Care
Volume 42
Issue 8
Pages 1530-1538
ISSN 0149-5992
Publication year 2019
Published at Institute of Neuroscience and Physiology
Institute of Medicine, Department of Molecular and Clinical Medicine
Pages 1530-1538
Language en
Keywords chronic kidney-disease, glycemic control, heart-failure, global burden, excess risk, population, standardization, epidemiology, hypertension, association, Endocrinology & Metabolism
Subject categories Endocrinology and Diabetes


OBJECTIVE This study identified variables associated with increased risk of atrial fibrillation in people with type 1 diabetes. RESEARCH DESIGN AND METHODS We performed a cohort study of people with type 1 diabetes from the Swedish National Diabetes Registry followed up between 1 January 2001 and 31 December 2013. Median follow-up was 9.7 years (interquartile range 5.2-13.0). The association between potential risk factors and incident atrial fibrillation was investigated using adjusted Cox regression. To compare the impact of each risk factor, the gradient of risk per 1 SD was estimated. RESULTS In this cohort of 36,258 patients with type 1 diabetes, 749 developed atrial fibrillation during follow-up. Older age, male sex, renal complications, increased BMI and HbA(1c), coronary artery disease, heart failure, and heart valve disease increased the risk of atrial fibrillation. Age, signs of renal dysfunction with macroalbuminuria, and decreasing estimated glomerular filtration rate were associated with the highest gradient of risk for atrial fibrillation. High blood pressure, severe obesity (BMI >35 kg/m(2)), and elevated levels of HbA(1c) (>9.6%) were associated with increased risk, but no associations were found with hyperlipidemia or smoking. CONCLUSIONS The most prominent risk factors for atrial fibrillation in people with type 1 diabetes were older age, cardiovascular comorbidities, and renal complications, while obesity, hypertension, and hyperglycemia had more modest affects.

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