GPT and gestational diabetes: In multivariable analysis, after adjustment for covariates, compared to the reference group (ALT<22 U/L), middle (22 to 40 U/L) [adjusted OR: 1.41 (1.21–1.65)] and high levels (≥40 U/L) [adjusted OR: 1.62 (1.31–2.00)] of ALT were associated with GDM in a graded manner (P value for trend: <0.001).