TABLE 3.

Threshold effect analysis of total percent fat (%) and serum uric acid (μmol/L) using the two-segment piecewise linear regression model.

	Males β (95% CI) p-value
Fitting by standard linear model
	1.72 (1.32, 2.12) <0.0001
Fitting by two-segment piecewise linear model
Inflection point	34.3
TPF < Inflection point	1.97 (1.55, 2.38) <0.0001
TPF > Inflection point	–0.96 (–2.24, 0.33) 0.1452
Log-likelihood ratio	<0.001