Table 4.

The result of two-piecewise linear regression model

	Incident diabetes	(HR,95%CI, P)
Fitting model by standard linear regression	0.54 (0.35, 0.82)	0.0044
Fitting model by two-piecewise linear regression
Inflection point of HDL-C	1.72
≤ 1.72	0.36 (0.21, 0.59)	< 0.0001
> 1.72	2.90 (0.96, 8.75)	0.0594
P for log likelihood ratio test	0.005

We adjusted for gender, age, ethanol consumption, smoking, regular exerciser, SBP, DBP, BMI, WC, TC, TG, HbA1c, FPG

CI Confidence interval