1666-P: Effect of Obesity in Family History (FH) on the Prevalence of Type 2 Diabetes Mellitus (T2DM), Hypertension (HT), and Dyslipidemia (DL)

Heritability and obesity are strongly associated with the prevalence of T2DM, HT, and DL. We compared the effects of an FH of T2DM, HT, and DL combined with obesity on the prevalence of each in the same population. Of 41931 participants who underwent health checkups, the effects of an FH and BMI on the prevalence of those conditions were analyzed cross-sectionally. Prevalences of T2DM, HT, and DL were 5%, 20%, and 48%, respectively. Logistic regression analysis showed that ORs increased for all three as the number of FH positive cases increased and was most pronounced for T2DM. An FH of obesity and increased BMI were additively associated with the prevalence of the three diseases compared to BMI 20.0-21.9 and no positive FH (Fig. A). In addition, the combination of the number of family members with FH positivity (0,1, 2, ≥3) and obesity was additively associated with an increased FH of the three diseases compared to non-obesity and no FH of any of these diseases (Fig. B). For T2DM, the OR increased sharply in non-obese participants when the number of those with an FH of T2DM was ≥3 (14.4 [8.88-23.5]), but in obese participants the OR increased sharply when the number of those with an FH of T2DM was 2 (12.2 [8.85-16.9]) (Fig. B). Results suggest that, especially for T2DM, avoidance of obesity may be effective in reducing the prevalence of these disorders in those with many FH-positive family members.