• Lina Lilja, Maria Bygdell, Jari Martikainen, Annika Rosengren, Jenny M Kindblom, and Claes Ohlsson.
• Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
• J. Intern. Med. 2023 May 1; 293 (5): 615623615-623.

BackgroundApproximately one third of thromboembolic (TE) events are related to obesity, but to which extent elevated body mass index (BMI) during the distinct periods of childhood and puberty contributes is not known. We aimed to evaluate the impact of high BMI during childhood and puberty for the risk of adult venous and arterial thromboembolic events (VTE, ATE, respectively) in men.MethodsWe included 37,672 men from the BMI Epidemiology Study (BEST) Gothenburg with data on weight and height in childhood, young adult age, and on pubertal BMI change. Information on outcomes (VTE [n = 1683], ATE [n = 144], or any first TE event [VTE or ATE; n = 1780]) was retrieved from Swedish national registers. Hazard ratios (HR) and 95% confidence intervals (CI) were estimated by Cox regressions.ResultsBoth BMI at 8 years of age and the pubertal BMI change were associated with VTE, independently of each other (BMI at 8: HR 1.06 per standard deviation [SD] increase, 95% CI, 1.01;1.11; pubertal BMI change: HR 1.11 per SD increase, 95% CI, 1.06;1.16). Individuals with normal weight during childhood followed by young adult overweight (HR 1.40, 95% CI, 1.15;1.72), and individuals with overweight at both childhood and young adult age (HR 1.48, 95% CI, 1.14;1.92), had a significantly increased risk of VTE in adult life, compared with the normal weight reference group. Individuals with overweight in childhood and in young adult age had increased risk of ATE and TE.ConclusionYoung adult overweight was a strong determinant, and childhood overweight a moderate determinant, of the risk of VTE in adult men.© 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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