Table 5.

Meta regression analysis of heterogeneous factors of HDL.

Research Factors	Regression Coefficients	95% CI	t	p
publication year	0.024	−0.001~−0.048	2.20	0.055
sample size	−0.001	−0.002~0.000	−2.01	0.076
intervention time	0.007	−0.007~0.022	1.11	0.297
diet	−0.013	−0.033~0.006	−1.54	0.159
medication	0.021	−0.024~0.066	−1.23	0.249