Table 4 The result of two-piecewise linear regression model

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