Table 6.

The result of the two-piecewise Cox proportional hazards regression model

Incident prediabetes	HR (95%CI)	P
Fitting model by standard Cox proportional hazards regression	1.41 (1.31, 1.52)	< 0.0001
Fitting model by two-piecewise Cox proportional hazards regression
Inflection points of AIP	0.03
≤ 0.03	1.90 (1.66, 2.16)	< 0.0001
> 0.03	1.04 (0.91, 1.19)	0.5528
P for log likelihood ratio test	< 0.001

We adjusted for gender, age, SBP, DBP, family history of diabetes, drinking status, smoking status, BMI, TC, LDL-C, AST, ALT, Scr, BUN, FPG

HR, hazard ratios; CI, confidence; AIP: atherogenic index of plasma