Table 4.

Indirect effect analyses to examine differences in mean (SD) education, income, and family size across delivery and abortion groups and to examine education, income, and family size as predictors of cut-off scores for depression (logistic regression) and continuous scores for depression (ordinary least squares regression)

Variable	Delivery group	Abortion group	t test comparing groups	P value	Odds ratio (95% CI)	P value	β (SE)	P value
Education	12.25 (2.07)	13.34 (2.33)	8.70	<0.001	0.83 (0.78 to 0.89)	<0.001	-0.764 (0.128)	<0.001
Income	3.15 (2.10)	4.15 (2.44)	7.06	<0.001	0.77 (0.72 to 0.84)	<0.001	-1.034 (0.131)	<0.001
Family size	2.68 (1.21)	1.24 (1.17)	-20.80	<0.001	1.13 (1.02 to 1.25)	<0.05	0.752 (0.234)	<0.001

Pregnancy outcome coded 0 for delivery and 1 for abortion.

For income variable, mean of 3.15 corresponds to income in range $20 001 (£11 400; €16 632) to $30 000, and mean of 4.15 corresponds to income range $30 001 to $40 000.

Positive t values comparing variables across groups indicate higher scores in abortion group; negative values indicate lower scores in abortion group.

Odds ratios less than 1 and negative β coefficients indicate that greater income and education are associated with decreased depression; larger family size is associated with increased depression, as evidenced by the odds ratio greater than 1 and positive β coefficient.