A serial mediation model of social media addiction and college students’ academic engagement: the role of sleep quality and fatigue

Table 2 Regression analysis of variable relationship in serial mediation model

Result variable	Predictor variable	R	R²	F	β	t
Sleep quality	SMA	0.382	0.146	113.114^***	0.357	19.838^***
	Gender				0.150	4.082^***
	Age				0.051	3.485^***
	Academic major				0.167	4.477^***
Fatigue	SMA	0.637	0.405	361.853^***	0.243	15.061^***
	Sleep quality				0.501	30.960^***
	Gender				0.185	5.889^***
	Age				−0.028	−2.333^*
	Academic major				−0.048	−1.539
Academic engagement	SMA	0.531	0.282	174.052^***	−0.051	−2.781^**
	Sleep quality				−0.087	−4.175^***
	Fatigue				−0.449	−21.050^***
	Gender				−0.023	−0.671
	Age				0.008	0.637
	Academic major				−0.031	−0.911

Note. SMA = Social media addiction. Gender, age, and academic major were controlled in the model. The study variables, excluding the control variables were standardized in the model. ^*p < 0.05, ^**p < 0.01, ^***p < 0.001

ISSN: 1471-244X