Table 3

CBCL and Q-CHAT model predictors using complete-case analysis with interaction of ‘EPDS x Term’

	CBCL		Q-CHAT
	B (95% CI)	p	B (95% CI)	p
Maternal EPDS	0.89 (−0.24 to 2.02)	0.121	0.24 (−0.28 to 0.75)	0.365
Maternal BMI	−0.01 (−0.39 to 0.37)	0.955	0.00 (−0.16 to 0.17)	0.982
Multiple pregnancy	1.76 (−6.65 to 10.17)	0.681	0.97 (−2.07 to 4.01)	0.532
Parity
1	−2.75 (−6.49 to 0.99)	0.149	−1.42 (−3.30 to 0.46)	0.139
2	−3.49 (−10.36 to 3.37)	0.317	0.16 (−2.84 to 3.16)	0.917
3+	−1.17 (−9.69 to 7.35)	0.788	−1.13 (−4.24 to 1.98)	0.476
IMD rank	−1.41 (−3.54 to 0.73)	0.195	−1.68 (−2.64 to -0.72)	0.001 **
Gestation: term	1.25 (−8.34 to 10.85)	0.797	2.64 (−1.74 to 7.02)	0.236
Birth weight (kg)	−1.01 (−4.08 to 2.05)	0.516	−2.25 (−3.73 to -0.78)	0.003 **
Sex: female	−4.64 (−7.83 to -1.44)	0.005 **	−2.22 (−3.72 to -0.71)	0.004 **
Corrected age at assessment (months)	−0.83 (−2.27 to 0.62)	0.261	−0.39 (−1.18 to 0.04)	0.335
Cognition	−0.03 (−0.20 to 0.14)	0.720	−0.22 (−0.29 to −0.15)	<0.001 ***
EPDS x Gestation:Term	−0.01 (−1.30 to 1.28)	0.991	−0.02 (−0.60 to 0.56)	0.950

*p<0.05; **p<0.01; ***p<0.001.
CBCL model adjusted R²=0.0865. Q-CHAT model adjusted R²=0.215.
B, unstandardised coefficient; CBCL, Child Behaviour Checklist score at 18 months; Cognition, infant Bayley III score at 18 months; Maternal EPDS, maternal Edinburgh Postnatal Depression Scale score at term-equivalent age; EPDS x Gestation:Term, interaction term between maternal EPDS score and term gestation at birth; Corrected age at assessment (months), age at behavioural assessment, corrected for gestational age; Parity, dummy variable, one/two/three+ previous child(ren); Multiple pregnancy, dummy variable of twin/triplet pregnancy; Q-CHAT, Quantitative Checklist for Autism in Toddlers score at 18 months; Gestation: term, dummy variable, term (≥37 weeks) versus preterm (<37 weeks) gestation at birth.