Table 2

Within-group comparison of intervention participants at baseline, 2-month follow-up, and 3-year follow-up (N=51)

	Baseline mean (SD)	2 months FU mean (SD)	3 years FU mean (SD)	F (2, 49)†	Within-subject change
					Baseline to 2 months FU				Baseline to 3 years FU
					Mean diff	F (1, 50)‡	95% CI	d	Mean diff	F (1, 50)‡	95% CI	d
CBCL 6–18
Total problem score	15.71 (9.8)	9.49 (7.4)	0.96 (2.1)	95.86***	6.22	15.13***	2.26 to 10.18	0.54	14.75	125.84***	11.49 to 18.00	1.57
Externalising problems	4.67 (5.2)	2.39 (3.5)	0.51 (1.4)	26.94***	2.28	8.28*	0.32 to 4.23	0.40	4.12	37.77***	2.48 to 5.83	0.86
GHQ-12	20.00 (4.2)	17.80 (4.8)	18.22 (2.3)	5.46**	2.18	7.37*	0.19 to 4.18	0.41	1.76	10.28**	0.40 to 3.11	0.46

*P<0.05, **p<0.01, ***p<0.001.
†F(2, 47) for GHQ-12.
‡P values adjusted for multiple comparison (Bonferroni); F(1, 48) for GHQ-12.
CBCL 6–18, Child Behaviour Checklist for children 6–18 years; FU, follow-up; GHQ, General Health Questionnaire.