Table 6.

The result of two-piecewise linear regression model.

Incident prediabetes	HR (95%CI)	P
Fitting model by standard linear regression	0.79 (0.75, 0.84)	<0.0001
Fitting model by two-piecewise linear regression
Inflection point of AST/ALT ratio	1.50
≤1.50	0.70 (0.65, 0.76)	<0.0001
>1.50	1.01 (0.89, 1.15)	0.8976
P for log likelihood ratio test	<0.001

We adjusted for gender, age, family history of diabetes, drinking status, smoking status, SBP, DBP, BMI, TC, TG, HDL-C, LDL-C, SCr, BUN, FPG.

HR, hazard ratios; CI, confidence; AST/ALT ratio: aspartate aminotransferase to alanine aminotransferase ratio.