Table 2.

Regression results for the mediation model.

Genders	Regression model		R2	F	b	SE	95%CI
	Outcomes variable	Predictors
Boys	Friendship quality (M1)	Best friends’ Dep (X)	0.002	0.35	−0.06	0.080	[−0.22, 0.09]
	Rumination (M2)	Best friends’ Dep	0.03	5.13***	0.11	0.062	[−0.01, 0.23]
	Adolescents’ own Dep (Y)	Best friends’ Dep	0.52	102.15***	0.08*	0.033	[0.01, 0.14]
		Friendship quality			−0.09***	0.019	[−0.13, −0.06]
		Rumination			0.52***	0.025	[0.47, 0.57]
Girls	Friendship quality	Best friends’ Dep	0.02	2.52*	−0.16*	0.067	[−0.29, −0.02]
	Rumination	Best friends’ Dep	0.03	5.27**	0.13*	0.057	[0.02, 0.24]
	Adolescents’ own Dep	Best friend’s Dep			−0.10**	0.032	[0.04, 0.16]
		Friendship quality	0.55	112.28***	−0.12**	0.022	[−0.16, −0.08]
		Rumination			0.56***	0.026	[0.51, 0.61]

^***p < 0.001, ^**p < 0.01, ^*p < 0.05. Dep = depressive symptoms, Acp = acceptance. All regression models included grade and only-child status as covariates.