Table 9.

Backwards logistic regression combining maternal characteristics with those of the early childhood of the woman.

Characteristics of mother and details of early childhood	Univariable			Intra domain
	N	P	OR [95% CI]	N	P	OR [95% CI]
Year of birth of her mother	10642	<0.0001****	1.43 [1.37, 1.48]	9855	<0.0001****	1.18 [1.12, 1.24]
Education < O-Level of her mother	11949	<0.0001****	2.13 [1.96, 2.33]	9855	<0.0001****	1.72 [1.56, 1.92]
Mother aged <25 at birth of woman	10651	<0.0001****	1.49 [1.38, 1.61]	9855	0.860	1.01 [0.89, 1.15]
Mother smoked when pregnant	12633	<0.0001****	1.63 [1.52, 1.76]	9855	<0.0001****	1.25 [1.15, 1.37]
Has birthmark	12633	<0.0001****	1.23 [1.13, 1.33]	9855	0.049*	1.10 [1.00, 1.21]
Year of birth of index woman	12559	<0.0001****	1.79 [1.70, 1.89]	9855	<0.0001****	1.40 [1.29, 1.51]
Lived in Avon	11531	<0.0001****	2.06 [1.91, 2.22]	9855	<0.0001****	1.58 [1.45, 1.72]
Breast fed	10003	<0.0001****	0.73 [0.67, 0.79]	8485	0.053	0.91 [0.83, 1.00]
Number of older siblings	11932	<0.0001****	1.33 [1.22, 1.45]	9855	<0.0001****	1.31 [1.19, 1.46]
Father absent from household	12633	<0.0001****	2.30 [2.01, 2.62]	9855	<0.0001****	1.87 [1.58, 2.23]

Total N = 9855, Overall GOF = 6.40

Total N = 6615, Overall GOF = 6.43.