Table 4. Analysis of the mediation effects.

Equation	Independent variable	Dependent variable	Model Summary		ANOVA		Coefficient
			R2	Adjusted R2	F	p	β	t	p
(1)	Physical exercise	Sleep	0.002	0.002	11.958	0.001	−0.011	−3.458	0.001
(2)	Mobile phone use	Sleep	0.158	0.158	950.875	<0.001	0.397	30.836	<0.001
(3)	physical exercise and Mobile phone use	Sleep	0.158	0.158	476.219	<0.001	−0.016	−1.214	0.025
							0.396	30.631	<0.001