TABLE 4.

Threshold Effect Analysis of Leisure-Time PA on CAP Using Two-Stage Linear Regression Model

CAP (dB/m)	Adjusted β (95% CI) P
Leisure-time PA(MET hours/week)
Inflection point	24
≤24	−0.301 (−0.439, −0.162) <0.0001
>24	0.016 (−0.046, 0.079) 0.6068
Log likelihood ratio test	<0.001
Woman
Inflection point	26
≤26	−0.196 (−0.380, −0.012) 0.0367
>26	−0.055 (−0.153, 0.043) 0.2734
Log likelihood ratio test	0.250
Age <60
Inflection point	24
≤24	−0.432 (−0.594, −0.271) <0.0001
>24	0.014 (−0.055, 0.084) 0.6888
Log likelihood ratio test	<0.001

Race, educational level, smoking status, BMI, WHR, ALT, AST, ALP, GGT, total cholesterol, triglyceride, HDL-C, UA, CRP, and glycohemoglobin were adjusted.

CAP indicates controlled attenuation parameter; MET, metabolic equivalent of task; PA, physical activity.