After adjusting for age and sex, the odds ratios that were significant for metabolic syndrome were 0.60 (95% CI: 0.38, 0.94) in better income, 0.46 (95% CI: 0.26, 0.83) in better education, 2.21 (95% CI: 1.22, 4.00) in betel nut chewing, 2.31 (95% CI: 1.43, 3.74) in abnormal uric acid, 1.68 (95% CI: 1.09, 2.61) in abnormal AST, 2.32 (95% CI: 1.65, 3.97) in abnormal ALT, 2.56 (95% CI: 1.65, 3.97) in abnormal γ-GT and 4.82 (95% CI: 1.33, 17.40) in abnormal creatinine. This evidence concerns the gene GPT and metabolic syndrome.