• J. Intern. Med. · Nov 2023

    Diabetes, prediabetes and atrial fibrillation - A population-based cohort study based on national and regional registers.

    • Cecilia Johansson, Lina Örtendahl, Marcus M Lind, Jonas Andersson, Lars Johansson, and Mattias Brunström.
    • Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
    • J. Intern. Med. 2023 Nov 1; 294 (5): 605615605-615.

    BackgroundPrevious studies have shown an increased risk for atrial fibrillation and atrial flutter (AF) in people with type 2 diabetes and prediabetes. It is unclear whether this increase in AF risk is independent of other risk factors for AF.ObjectiveTo investigate the association between diabetes and different prediabetic states, as independent risk factors for the onset of AF.MethodsWe performed a population-based cohort study in Northern Sweden, including data on fasting plasma glucose, oral glucose tolerance test, major cardiovascular risk factors, medical history, and lifestyle factors. Participants were divided into six groups depending on glycemic status and followed through national registers for AF diagnosis. Cox proportional hazard model was used to assess the association between glycemic status and AF, using normoglycemia as reference.ResultsThe cohort consisted of 88,889 participants who underwent a total of 139,661 health examinations. In the model adjusted for age and sex, there was a significant association between glycemic status and development of AF in all groups except the impaired glucose tolerance group, with the strongest association for the group with known diabetes (p-value <0.001). In a model adjusted for sex, age, systolic blood pressure, body mass index, antihypertensive drugs, cholesterol, alcohol, smoking, education level, marital status, and physical activity, there was no significant association between glycemic status and AF.Conclusions/InterpretationThe association between glycemic status and AF disappears upon adjustment for potential confounders. Diabetes and prediabetes do not appear to be independent risk factors for AF.© 2023 The Authors. Journal of Internal Medicine published by John Wiley & Sons Ltd on behalf of Association for Publication of The Journal of Internal Medicine.

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