Table 2.

Associations between the neighbourhood status score and adverse pregnancy outcomes

Study population N=8617	Model		Lowest deprivation quartile n=2277		Second deprivation quartile n=2123		Third deprivation quartile n=2084		Highest deprivation quartile n=2133	Trend	P value for trend
			β/OR (95% CI)		β/OR (95% CI)		β/OR (95% CI)			β/OR (95% CI)
Small-for-gestational age	Basic	261 (11.5%)	1.80 (1.46 to 2.22)	220 (10.4%)	1.46 (1.17 to 1.81)	190 (9.1%)	1.31 (1.05 to 1.64)	153 (7.2%)	Reference	0.86 (0.81 to 0.90)	<0.001
	Adjusted		1.39 (1.09 to 1.77)		1.14 (0.90 to 1.44)		1.13 (0.90 to 1.42)		Reference	0.91 (0.86 to 0.97)	0.003
Preterm birth	Basic	129 (5.6%)	1.60 (1.21 to 2.13)	142 (6.7%)	1.76 (1.33 to 2.32)	109 (5.2%)	1.41 (1.05 to 1.89)	81 (3.8%)	Reference	0.88 (0.83 to 0.95)	<0.001
	Adjusted		1.52 (1.11 to 2.09)		1.65 (1.23 to 2.22)		1.32 (0.97 to 1.77)		Reference	0.89 (0.82 to 0.96)	0.004

Values are OR with 95% CI of the data in SD score and are based on logistic regression models.

P-value in bold: statistically significant p-value<0.05.

Basic model: by the use of SD scores it is automatically adjusted for gestational age. Adjusted model: basic model and additionally adjusted for maternal age, educational level, smoking, alcohol use, folic acid supplement use, ethnicity, parity, prepregnancy body mass index and fetal sex.

P for trend analysis with the neighbourhood deprivation as a continuous measure.

Small-for-gestational age at birth was defined as sex-adjusted and gestational age-adjusted birth weight below the 10th percentile (<−1.40 SD score) in the study cohort.

Preterm birth was defined as gestational age of <37 weeks at delivery.

β, beta.