Figure 1.

Adjusted hazard ratios^∗ (95% confidence interval; P) of the development of diabetes mellitus according to the combined categories of ALT and GGT levels (1st and 2nd quartile, 3rd quartile, and 4th quartile). The reference category consisted of the 1st and 2nd quartile of ALT and GGT levels. Interaction terms for ALT and GGT combinations were statistically significant (P < .001). ALT = alanine aminotransferase, BMI = body mass index, GGT = gamma-glutamyltransferase. ^∗The model was adjusted for age, sex, BMI = log-transformed weekly alcohol consumption, fasting glucose, current smoker, hypertension, dyslipidemia, and uric acid.