Table 2.

Mean-Level Gender and Grade Group Differences in Study Variables

	Girls M (SD)	Boys M (SD)	Gender PE	Grade Group PE	Interaction PE
Depression (Time 1)	9.81 (8.26)	10.04 (8.33)	.07	.13	−.12
Depression (Time 2)	10.25 (8.50)	9.93 (8.42)	.07	.12	−.26
Anxiety (Time 1)	2.43 (.84)	2.12 (.83)	−.35**	−.29*	−.06
Anxiety (Time 2)	2.37 (.83)	2.00 (.73)	−.45***	−.21	−.03
Co-Rumination (Time 1)	2.79 (.91)	2.09 (.95)	−.45***	.11	−.62***
Self-Disclosure (Time 1)	3.69 (.94)	2.65 (1.10)	−.65****	.34**	−.63***

Notes.

^*p < .05.

^***p < .001.

^****p < .0001. PE = standardized parameter estimate. Gender was coded as 0 = Girls, 1 = Boys; grade group was coded as 0 = Children, 1 = Adolescents.