Table 4.

Backwards step-wise logistic regression of the woman’s locus of control score (>4 versus ≤4) using the variables relating to her mother’s background.

Characteristics of her mother	Univariable			Intra domain adjustment
	N	P	OR [95% CI]	N	P	OR [95% CI]
Mother’s year of birth	10642	<0.0001****	1.43 [1.37, 1.48]	10642	<0.0001****	1.50 [1.42, 1.58]
Mother’s education < O-Level	11949	<0.0001****	2.13 [1.96, 2.33]	10642	<0.0001****	2.00 [1.82, 2.17]
Mother smoked	11811	<0.0001****	1.47 [1.37, 1.58]	10168	0.153	1.08 [0.97, 1.21]
Mother aged <25 at birth of woman	10651	<0.0001****	1.49 [1.38, 1.61]	10642	<0.001***	0.83 [0.74, 0.93]
Mother’s social group	12633	0.017*	0.63 [1.00, 1.03]	10642	0.826	1.00 [0.98, 1.01]
Smoked when pregnant with woman	12633	<0.0001****	1.63 [1.52, 1.76]	10642	<0.0001****	1.37 [1.26, 1.48]

Total N = 10642; Overall GOF = 4.34%.