Table 4.
Variable | Cases (N=236) | Controls (N=518) | Unadjusted for SES | Adjusted for SES | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||
Exposed N | Exposed % | Exposed N | Exposed % | OR | 95% CI OR | χ2 | Pa | OR | 95% CI OR | Wald | Pb | |
At least one pregnancy complication | 130 | 53.5 | 239 | 45.5 | 1.72 | 1.17–2.50 | 7.91 | <0.01 | 1.76 | 1.18–2.62 | 7.72 | <0.01 |
Premature birth (gestational age < 37 weeks at birth) | 43 | 18.2 | 61 | 11.8 | 1.69 | 1.10–2.59 | 5.91 | <0.05 | 1.72 | 1.11–2.65 | 5.90 | <0.05 |
Morning sickness requiring medical attention | 22 | 9.32 | 20 | 3.86 | 2.69 | 1.43–5.06 | 9.99 | <0.01 | 2.57 | 1.32–4.75 | 7.95 | <0.01 |
At least one delivery complication | 103 | 42.4 | 209 | 39.6 | 1.17 | 0.84 – 1.61 | 0.85 | 0.36 | 1.17 | 0.83 – 1.65 | 0.85 | 0.36 |
At least one neonatal complication | 51 | 21.0 | 96 | 18.2 | 1.17 | 0.78 – 1.75 | 0.59 | 0.47 | 1.29 | 0.87 – 1.96 | 1.53 | 0.22 |
| ||||||||||||
Mean | SD | Mean | SD | Z | Pc | OR | 95% CI OR | Wald | Pb | |||
| ||||||||||||
Total number of pregnancy complications | 1.15 | 1.27 | 0.94 | 1.28 | −2.21 | <0.05 | 1.13 | 0.99–1.28 | 3.78 | 0.05 | ||
Total number of delivery complications | 0.55 | 0.85 | 0.49 | 0.85 | −1.60 | 0.11 | 1.08 | 0.89–1.32 | 0.60 | 0.44 | ||
Total number of neonatal complications | 0.67 | 1.70 | 0.52 | 1.35 | −1.66 | 0.10 | 1.09 | 0.98–1.22 | 2.68 | 0.10 | ||
Total number of complications | 2.36 | 2.66 | 1.95 | 2.57 | −3.01 | <0.01 | 1.07 | 1.01–1.14 | 5.45 | <0.05 |
OR, odds ratio; CI, confidence interval
Comparisons were done using Pearson’s chi-square tests with one degree of freedom
Comparisons were done with a logistic regression with one degree of freedom
Comparisons were done with the Mann-Whitney test