Table 2 . Scores for the ICDP group and comparison group on parenting behaviours and child difficulties before, after and at follow-up based on repeated measures ANCOVAs with pre-scores as covariate and time of measurement (after/follow-up) as within-subject factor.

			Before ICDP		After ICDP		Follow-up
Measure	Group	N	Mean	SD	Mean	SD	Mean	SD	F Group	p		F inter	p		F within	p
Parenting strategies	ICDP	62	18.74	1.97	19.63	1.69	18.84	1.98	6.38	.013*	.053	1.15	.287	.010	.16	.69	.001
	Comp	57	19.33	2.30	18.98	2.59	18.86	2.52
Activities (25–125)	ICDP	23	104.74	9.55	105.65	10.62	105.17	9.27	1.98	.166	.039	2.40	.128	.047	1.45	.234	.029
	Comp	31	104.29	8.90	101.23	9.11	103.68	9.02
Watch TV/play computer games with adult1	ICDP	22	2.58	2.66	2.21	1.92	2.09	1.63	5.54	.024*	.130	.020	.887	.001	2.15	.151	.055
	Comp	20	1.40	1.18	1.75	1.52	2.01	1.61
Child management	ICDP	45	2.26	.55	2.07	.50	2.15	.51	12.93	.001*	.144	2.56	.113	.032	8.89	.004*	.104
	Comp	37	2.11	.48	2.16	.46	2.44	.63
Positive discipline (0–105)	ICDP	42	44.92	19.12	52.92	24.47	44.93	13.65	1.37	.244	.016	.854	.358	.010	.98	.325	.012
	Comp	47	44.52	21.70	45.61	21.38	43.18	22.76
SDQ (total difficulties) (0–40)	ICDP	60	8.30	4.09	7.22	4.47	7.67	4.76	3.03	.084	.028	1.22	.272	.011	1.05	.308	.010
	Comp	50	6.10	3.30	6.34	3.88	6.18	3.13
SDQ prosocial (0–10)	ICDP	61	7.20	2.38	7.47	2.34	7.49	2.20	.014	.906	.000	.001	.975	.000	1.84	.178	.017
	Comp	53	7.83	2.03	7.98	1.81	7.89	1.61
SDQ impact score (0–10)	ICDP	58	.43	.88	.27	.87	.53	1.59	.125	.724	.001	.728a	.395	.007	.59	.442	.005
	Comp	57	.09	.34	.11	.45	.07	.26

Notes: F = ANOVA, interaction between group and time, measuring the difference in change scores between the two groups. p, probability; , effect size. ^* p = < .05.

^a Please note that the means for “Watching TV and playing computer games with adult” are given in hours.