TABLE 2.

Significance test of mediation effect and value of mediation effect.

Path	Effect value	Effect size	95% confidence interval
			Lower limit	Upper limit
Family functioning →loneliness	−0.21***	60%	–0.452	–0.414
Family functioning → core Self-evaluation → loneliness	−0.22***	63%	–0.189	–0.167
Family functioning → problematic mobile phone use → loneliness	0.01	3%	–0.001	0.002
Family functioning → core Self-evaluation → problematic Mobile phone use → loneliness	−0.01***	3%	–0.008	–0.003

***p < 0.001.