Table 4.

Hierarchical regression analysis of chained mediation effects.

	Regression equation			Overall fit index		Significance of regression coefficients
Outcome variable		Predictor variable	R	R2	F	β	SE	t
DASS			0.169	0.029	178.672***
		Gender				−0.132	0.193	−21.128***
		Grade				0.075	0.094	13.160***
		Cigarette smoking				0.055	0.26	9.055***
		Drinking wine				0.01	0.16	1.698
		Physical exercise				−0.071	0.143	−11.894***
DASS			0.477	0.227	1280.918***
		Gender				−0.139	0.172	−24.915***
		Grade				0.053	0.084	10.340***
		Cigarette smoking				0.026	0.232	4.830***
		Drinking wine				−0.032	0.143	−5.952***
		Physical exercise				−0.018	0.131	−3.251**
		Sleep quality				0.389	0.019	74.068***
		Self-rated health				−0.154	0.079	−28.734***
Sleep quality			0.135	0.018	113.446***
		Gender				0.014	0.053	2.166*
		Grade				0.063	0.026	11.021***
		Cigarette smoking				0.067	0.071	10.963***
		Drinking wine				0.081	0.044	13.389***
		Physical exercise				−0.044	0.039	−7.306***
Self-rated health			0.337	0.114	650.186***
		Gender				−0.007	0.0124	−1.13
		Grade				0.03	0.0061	5.446***
		Cigarette smoking				−0.002	0.017	−0.322
		Drinking wine				−0.051	0.01	−8.819***
		Physical exercise				0.225	0.009	39.422***
		Sleep quality				−0.242	0.001	−44.530***

In the text, *** represents p < 0.001, ** represents p < 0.01, and * represents p < 0.05.