Abstract: Sasang constitutional medicine is a traditional customized medicine in Korea that classifies people into four types: Taeeumin (TE), Taeyangin (TY), Soeumin (SE), and Soyangin (SY). This
study explored whether Sasang constitution (SC) types combined with general obesity could be risk factors for prediabetes mellitus (pre?DM). This study was cross?sectional and was conducted from
November 2007 to July 2011 in 23 Korean medical clinics. In total, 2185 eligible subjects participated. A t test, one?way ANOVA with Scheffé’s post hoc analysis, the chi?square test and multinomial logis?
tic regression were used. Significance was indicated by p < 0.05. The numbers of participants with normal fasting plasma glucose (FPG) levels and pre?DM were 405 (75.3%) and 133 (24.7%) in the SE,
516 (70.3%) and 218 (29.7%) in the SY, and 590 (64.6%) and 323 (35.4%) in the TE (p < 0.001) groups, respectively. There was a significant difference in the proportion of each SC type among people with
pre?DM and normal FPG levels in the normal BMI group. The odds ratios (ORs) of the TE type were significantly different from those of the SE type in the crude and Model 1. The distribution of the
normal FPG and pre?DM individuals between the obese and normal BMI groups only for the SY type was significantly different. The SY type combined with general obesity had a higher OR (1.846,
95% CI 1.286–2.649) than that combined with normal BMI among participants with pre?DM, and this higher OR remained after adjusting for covariates (OR, 1.604, 95% CI, 1.093–2.354). This study
revealed that the TE type might be a risk factor for pre?DM in the normal BMI group, and the SY type with general obesity could be a risk factor for pre?DM compared with the SY type with normal
BMI. Accordingly, SC and BMI should be considered when managing pre?DM. To clarify the risk of SC and BMI, further study including epigenetic factors is needed.
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