RT Journal Article SR Electronic T1 Age-specific atrial fibrillation incidence, attributable risk factors and risk of stroke and mortality: results from the MORGAM Consortium JF Open Heart JO Open Heart FD British Cardiovascular Society SP e001624 DO 10.1136/openhrt-2021-001624 VO 8 IS 2 A1 Bente Morseth A1 Bastiaan Geelhoed A1 Allan Linneberg A1 Lars Johansson A1 Kari Kuulasmaa A1 Veikko Salomaa A1 Licia Iacoviello A1 Simona Costanzo A1 Stefan Söderberg A1 Teemu J Niiranen A1 Julie K K Vishram-Nielsen A1 Inger Njølstad A1 Tom Wilsgaard A1 Ellisiv B Mathiesen A1 Maja-Lisa Løchen A1 Tanja Zeller A1 Stefan Blankenberg A1 Francisco M Ojeda A1 Renate B Schnabel A1 , YR 2021 UL http://openheart.bmj.com/content/8/2/e001624.abstract AB Background The main aim was to examine age-specific risk factor associations with incident atrial fibrillation (AF) and their attributable fraction in a large European cohort. Additionally, we aimed to examine risk of stroke and mortality in relation to new-onset AF across age.Methods We used individual-level data (n=66 951, 49.1% men, age range 40–98 years at baseline) from five European cohorts of the MOnica Risk, Genetics, Archiving and Monograph Consortium. The participants were followed for incident AF for up to 10 years and the association with modifiable risk factors from the baseline examinations (body mass index (BMI), hypertension, diabetes, daily smoking, alcohol consumption and history of stroke and myocardial infarction (MI)) was examined. Additionally, the participants were followed up for incident stroke and all-cause mortality after new-onset AF.Results AF incidence increased from 0.9 per 1000 person-years at baseline age 40–49 years, to 17.7 at baseline age ≥70 years. Multivariable-adjusted Cox models showed that higher BMI, hypertension, high alcohol consumption and a history of stroke or MI were associated with increased risk of AF across age groups (p<0.05). Between 30% and 40% of the AF risk could be attributed to BMI, hypertension and a history of stroke or MI. New-onset AF was associated with a twofold increase in risk of stroke and death at ages≥70 years (p≤0.001).Conclusion In this large European cohort aged 40 years and above, risk of AF was largely attributed to BMI, high alcohol consumption and a history MI or stroke from middle age. Thus, preventive measures for AF should target risk factors such as obesity and hypertension from early age and continue throughout life.The data are not available in a public repository. Access to the data is restricted by the ethical approvals and the legislation of the European Union and the countries of each MORGAM study. Approval by the Principal Investigator of each cohort study and the MORGAM/BiomarCaRE Steering Group will be required for release of the data. The MORGAM Manual at https://www.thl.fi/publications/morgam/manual/contents.htm gives more information on access to the data.