Table 2.

Correlation matrix.

Variable			Age		Depression		Anxiety		Loneliness		Social support		Physical activity		Extracurricular		Social media checking		Social media posting
Age
	r	—a		—		—		—		—		—		—		—		—
	P value	—		—		—		—		—		—		—		—		—
Depression
	r	−0.08		—		—		—		—		—		—		—		—
	P value	<.001		—		—		—		—		—		—		—		—
Anxiety
	r	−0.12		0.73		—		—		—		—		—		—		—
	P value	<.001		<.001		—		—		—		—		—		—		—
Loneliness
	r	−0.04		0.67		0.61		—		—		—		—		—		—
	P value	.006		<.001		<.001		—		—		—		—		—		—
Social support
	r	0.05		−0.32		−0.22		−0.31		—		—		—		—		—
	P value	<.001		<.001		<.001		<.001		—		—		—		—		—
Physical activity
	r	−0.07		0.10		0.09		−0.03		0.06		—		—		—		—
	P value	<.001		<.001		<.001		.02		<.001		—		—		—		—
Extracurricular
	r	−0.08		0.43		0.42		0.28		−0.09		0.41		—		—		—
	P value	<.001		<.001		<.001		<.001		<.001		<.001		—		—		—
Social media checking
	r	0.12		0.25		0.20		0.19		−0.02		0.12		0.17		—		—
	P value	<.001		<.001		<.001		<.001		—		<.001		<.001		—		—
Social media posting
	r	0.06		0.34		0.28		0.24		−0.11		0.17		0.28		0.72		—
	P value	<.001		<.001		<.001		<.001		<.001		<.001		<.001		<.001		—
Social media total
	r	0.10		0.32		0.26		0.23		−0.08		0.15		0.25		0.92		0.93
	P value	<.001		<.001		<.001		<.001		<.001		<.001		<.001		<.001		<.001

^aNot applicable.