Table 1.

Sample Information, N = 2901

Concept	Measure	Time point	Response category or range	% or mean (standard error)
Child characteristics	Child gender	10 months	male	51.6
			female	48.4
	Developmental delay	22 months	no	92.6
			yes	7.4
	Internalising problems	46 months	0 to 17	2.36 (0.06)
		58 months	0 to 14	2.32 (0.06)
		70 months	0 to 18	2.29 (0.07)
		94 months	0 to 18	2.77 (0.08)
	Conduct problems	46 months	0 to 9	1.98 (0.03)
		58 months	0 to 10	1.75 (0.03)
		70 months	0 to 10	1.60 (0.04)
		94 months	0 to 10	1.54 (0.04)
	Hyperactivity/inattention	46 months	0 to 10	3.66 (0.05)
		58 months	0 to 10	3.72 (0.05)
		70 months	0 to 10	3.57 (0.05)
		94 months	0 to 10	3.53 (0.05)
	Prosocial behaviour	46 months	0 to 10	7.85 (0.04)
		58 months	0 to 10	8.25 (0.04)
		70 months	0 to 10	8.43 (0.03)
		94 months	1 to 10	8.52 (0.03)
	School maladjustment	58/70 months	−0.59 to 3.65	0.02 (0.02)
		94 months	−0.45 to 3.75	0.05 (0.03)
Maternal characteristics	Mother’s ethnic group	10 months	white	97
			minority	3
	Mother’s age at birth of child	10 months	Under 20	7.5
			20 to 29	41.6
			30 to 39	47.8
			40 or older	3.1
	Low maternal mental health	10 months	no	84.8
			yes	15.2
	Stronger partner relationship	22 months	−3.30 to 1.25	0.00 (0.02)
Family characteristics	Father in household	10 months	yes	79.3
			no	20.7
	Number of children	10 months	one	47.7
			two or three	48.2
			four or more	4.2
	Family income	10 months	q1 (lowest)	21.9
			q2	20.2
			q3	18.5
			q4	21.1
			q5 (highest)	18.3
Parenting	Mother-infant bonding	10 months	−4.18 to 1.78	−0.01 (0.01)
	Smacking	22 months	no	83
			yes	17
	Mother-child warmth	58 months	−5.87 to 0.36	−0.04 (0.02)
		94 months	−5.93 to 0.46	−0.04 (0.01)
	Mother-child conflict	58 months	−0.94 to 2.58	0.04 (0.02)
		94 months	−0.90 to 2.71	0.04 (0.01)