GPT and vitamin D deficiency: Serum levels of ALT, ALP, bilirubin, and creatinine; sex; ascites; variceal bleeding; BMI ≥ 25 kg/m2; development of high-grade strictures; hepatobiliary malignancy; and both the serum vitamin D level and severe vitamin D deficiency (Table 3) were associated with poor clinical liver outcomes in univariate analysis.