GPT and major depressive disorder: However, the levels of ALT (P < 0.001), AST (P = 0.002), UA (P < 0.001), triglyceride (P = 0.022) and cholesterol (P < 0.001) are significantly different among the three groups, and the levels of triglyceride (1.96 ± 1.22 mmol/L) and UA (359.90 ± 72.50 mol/L) show the highest in the bipolar disorder group, while the levels of ALT (33.26 ± 30.91 U/L) and AST (24.97 ± 11.44 U/L) in the depression group are the highest.