Table 3.

Perinatal factors of children with the Internalizing Problems (IP) or with the Externalizing Problems (EP) compared to a random sample from controls

	Controls without IP (N = 96)	IP (N = 44)	Controls vs. IP			Controls without EP (N = 97)	EP (N = 30)	Controls vs. EP
	%	%	UOR	d (95% CI)	p	%	%	UOR	d (95% CI)	p
Maternal age at pregnancy
Below 30	68.1	61.9	ref			68.0	55.2	ref
30 years or above	31.9	38.1	1.31 (0.62-2.80)	0.07 (-0.12-0.25)	0.482	32.0	44.8	1.45 (0.61-3.45)	0.09 (-0.12-0.30)	0.399
Unwanted pregnancy	25.0	39.0	1.92 (0.86-4.27)	0.16 (-1.80-2.12)	0.109	28.1	53.3	3.55 (1.40-8.99)	0.30 (0.08-0.53)	0.008**
No regular prenatal check-ups	14.0	9.3	0.63 (0.19-2.06)	-0.11 (-0.40-0.18)	0.446	10.8	10.0	1.75 (0.39-7.85)	0.13 (-0.23-0.50)	0.463
Maternal alcohol intake	4.0	6.8	1.74 (0.37-8.12)	0.13 (-0.25-0.51)	0.482	3.9	10.0	2.22 (0.47-10.57)	0.19 (-0.19-0.57)	0.316
Severe stress during pregnancy	37.6	61.4	2.63 (1.26-5.50))	0.23 (0.05-0.41)	0.010*	32.7	56.7	2.35 (1.01-5.50)	0.21 (-0.00-0.41)	0.048*
Change in primary care taker	11.1	18.6	1.83 (0.67-5.03)	0.15 (-0.10-0.39)	0.242	14.8	13.3	0.54 (0.17-1.75)	-0.15 (-0.43-0.14)	0.302
Primary care taker other than mother	21.2	20.5	0.96 (0.40-2.30)	-0.01 (-0.22-0.20)	0.918	20.8	26.7	1.55 (0.58-4.10)	0.11 (-0.14-0.35)	0.382
Postpartum depression
None	737	52.6	ref			72.5	68.0	ref
Very mild to mild	16.2	26.3	2.28 (0.90-5.79)	0.20 (-0.03-0.43)	0.083	17.7	24.0	1.25 (0.41-3.81)	0.05 (-0.22-0.33)	0.696
Moderate to severe	10.1	21.1	2.92 (1.02-8.37)	0.26 (-0.00-0.52)	0.046*	9.8	8.0	0.90 (0.17-4.91)	0.03 (-0.39-0.44)	0.905

Results of binary logistic regression analyses; UOR, unadjusted odd ratio; ref, reference group; ^*p <0.05.^**p <0.01.