GPT and prediabetes syndrome: considering glucose metabolism status (normal glucose tolerance, prediabetes, diabetes) and some main laboratory variables: ALT (cutoffs: <40, 40–99, ≥100 IU/L), creatinine (cutoffs: <1.0, 1.0–1.4, ≥1.5 mg/dL), total cholesterol (cutoffs: <200, 200–240, ≥240 mg/dL), triglycerides (cutoffs: <80, 80–149, ≥150 mg/dL) and platelets (cutoffs: ≥150, 100–149, <100 × 109/L).