GPT and metabolic syndrome: For females with ALT ≤40 U/L, the morbidity rate of MetS was 40.92%; the morbidity rate in the first (1–11 U/L), second (12–15 U/L), third (16–20 U/L), and fourth groups (21–40 U/L) was 23.09%, 35.63%, 47.56%, and 57.69%, respectively.