TABLE 5.

Bootstrap analysis of the mediating effect test.

Paths	Effect	BootSE	Boot95% CI		Effect size ratio
			Lower limit	Upper limit
C’	–0.097	0.023	–0.142	–0.042	48.26%
a1 b1	0.011	0.008	–0.004	0.027	–
a2 b2	–0.054	–0.013	–0.081	–0.030	26.87%
a1 a3 b2	–0.050	0.009	–0.068	–0.034	24.88%
Total indirect effect	–0.104	0.016	–0.125	–0.064	51.75%
Total effect	–0.201	0.0257	–0.24	–0.139	100%

C’, physical activity → Internet addiction; a1b1, physical activity → self-efficacy → internet addiction; a2b2, physical activity → self-control → Internet addiction; a1a3b2, physical activity → self-efficacy → self-control → Internet addiction; a1b1 has the opposite sign of the C’ effect size. And its proportion does not have a good effect size, so it is no longer expressed.