General characteristics of subjects according to the presence of metabolic syndrome and to classification variables are shown in Table 1. The prevalence rate of metabolic syndrome in the Korean adult population was 18.5% in KNHANES 2007–2012. No differences in the prevalence rate of metabolic syndrome were observed between females (18.5%) and males (18.4%). There were significant differences between groups with and without the metabolic syndrome in the frequency distribution according of all classification variables, including age, residence area, smoking and drinking status, education level, obesity, and regular exercise and walking (P<0.001). Significant differences between two groups were also shown in the means of selected continuous variables,including body mass index, the five individual components of metabolic syndrome (waist circumferences, Serum HDL-cholesterol levels, serum triglyceride levels, blood pressure and blood
glucose levels),
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