GPT and gestational diabetes: Compared to the reference group (ALT<22 U/L), ALT middle levels (22 to 40 U/L) was still associated with GDM [adjusted OR: 1.22 (1.01–1.46)] but ALT high levels (≥40 U/L) was not associated with GDM [adjusted OR: 1.11 (0.83–1.49)].