Table 4.

Predicted marginal prevalence of preterm birth*

Anxiety and depression status during pregnancy†	Overall % (95% CI)	Stratified by neighbourhood deprivation indices (quintile)
		Quintile 1† % (95% CI)	Quintile 2 % (95% CI)	Quintile 3 % (95% CI)	Quintiles 4 and 5‡ % (95% CI)
Absence of both anxiety and depression	7.1 (6.8 to 13.1)	7.6 (5.6 to 9.3)	6.4 (4.8 to 7.9)	6.9 (5.1 to 8.8)	7.6 (5.9 to 9.3)
Presence of anxiety only	6.3 (3.3 to 9.1)	5.4 (0.2 to 10.7)	4.9 (0.3 to 9.5)	6.5 (0.3 to 12.7)	7.9 (1.3 to 14.9)
Presence of depression only	9.6 (5.2 to 14.1)	4.7 (0.5 to 10.4)	5.7 (0.45 to 13.4)	13.3 (3.0 to 23.2)	14.1 (2.7 to 25.3)
Presence of both anxiety and depression	10.0 (6.8 to 13.1)	1.4 (0.1 to 4.2)	8.0 (1.9 to 14.1)	15.9 (6.3 to 25.6)	15.7 (9.5 to 23.2)

*Adjusted for parity, ethnicity and body mass index, maternal age, smoking, social support, maternal education and household total income.

†Quintile 1: least deprived neighbourhood.

‡Quintile 5: most deprived neighbourhood (quintiles 4 and 5 were combined due to few or no cases in some strata).