GPT and diabetes mellitus: As shown in Table 2, univariate analysis indicated that the course of DM (OR = 1.01, 95% CI: 1.00–1.01, P < .001), SBP (OR = 1.01, 95% CI: 1.00–1.02, P = .015), FPG (OR = 1.05,95% CI: 1.02–1.09, P = .005), and AST/ALT ratio (OR = 2.25, 95% CI: 1.51–3.34, P < .001) were all positively related to the occurrence of DR.