Table 5.

Spearman correlations of smartphone usage, physical activity, and mental health outcomes at t2.

	Girls		Boys
Variable	1. Smartphone Use	2. Physical Activity	1. Smartphone Use	2. Physical Activity
1. Smartphone use
2. Physical activity	−0.221 **		−0.144
3. General anxiety	0.135 **	−0.192 **	0.160	−0.213 *
4. Depression	0.214 **	−0.164 **	0.335 **	−0.077
5. Insomnia	0.185 **	−0.171 **	0.353 **	−0.136
6. Well-being	−0.213 **	0.264 **	−0.235 *	0.235 **
7. Stress	0.144 **	−0.170 **	0.311 **	−0.292 **

* indicates p < 0.05, ** indicates p < 0.01.