• Izumi Ikeda, Risa Igarashi, Kazuya Fujihara, Yasunaga Takeda, Efrem d'Ávila Ferreira, Khin Lay Mon, Satoru Kodama, Yasumichi Mori, Takashi Kadowaki, Ritsuko Honda, Yasuji Arase, and Hirohito Sone.
• Department of Hematology, Endocrinology and Metabolism, Niigata University Faculty of Medicine, Niigata, Japan.
• Mayo Clin. Proc. 2025 Jan 27.

ObjectiveTo examine the association between a positive family history (parents, siblings, and grandparents) of type 2 diabetes mellitus (T2DM), hypertension, and dyslipidemia and their prevalence and incidence in the same population.Patients And MethodsData on 41,361 participants who underwent health examinations between January 1, 1997, and December 31, 2007, were analyzed, and the results of logistic and Cox regression analyses in the same cohort were examined.ResultsCross-sectional analyses showed that the prevalence of all three diseases increased with a positive family history, especially T2DM, with an odds ratio (OR) of 12.00 (95% CI, 7.82 to 18.41) when the number of affected relatives was greater than or equal to 3 with an OR of 20.43 (95% CI, 11.0 to 37.8) for a positive family history across three generations compared with no family history. However, redefining family history from "parents, siblings, and grandparents" to "parents and siblings" or "parents only" did not significantly change ORs for each disease. Among those with a positive family history and body mass index greater than or equal to 30.0 kg/m2 hypertension was 19 times more prevalent compared with no family history and body mass index of 18.5 to 24.9 kg/m2. In the longitudinal study, family history strongly influenced incident T2DM (hazard ratio[HR], 2.40; 95% CI, 1.93 to 2.98), hypertension (HR, 1.43; 95% CI, 1.26 to 1.62), and dyslipidemia (HR, 1.41; 95% CI, 1.08 to 1.83), respectively.ConclusionObtaining a family history of these diseases was useful in identifying high-risk groups. Also, for T2DM, the influence of a positive family history was strongest with a marked increase in risk with overlap of affected family members, suggesting that a family history is useful for early detection and prevention.Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.

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