GPT and Gilbert syndrome: In our study, participants with serum total bilirubin ≥2.1 mg/dL or ALT ≥80 IU/L or GGT ≥80 IU/L were excluded, but individuals with Gilbert's syndrome and may be included in the Quartile-4 (men, 1.03–2.00 mg/dL and women, 0.89–2.00 mg/dL) group.