Table 2.
Multivariable Logistic Regression Model of Adverse Pregnancy Outcomes with Selected Predictors (n=263)
| Predictor | Adjusted odds ratio of adverse outcomea (95% confidence interval) | Points assigned for weighted risk score |
|---|---|---|
| Black race | ||
| Primiparous | 0.58 (0.10–3.50) | 1 |
| Multiparous | 15.8 (3.35–74.89) | 3 |
| Tobacco use | ||
| Black race | 0.65 (0.21–2.02) | 1 |
| White or other race | 6.56 (1.22–35.14) | 2 |
| Substance abuse within past year | 1.85 (0.70–4.91) | 1 |
| History of childhood rape or abuse | 5.14 (1.17–22.57) | 2 |
| Other medical conditionsb | ||
| Primiparous | 49.49 (5.73–427.78) | 3 |
| Multiparous | 0.91 (0.17–5.01) | 1 |
| Body mass index>40 | ||
| Primiparous | 43.18 (4.29–434.26) | 3 |
| Multiparous | 0.87 (0.15–5.04) | 1 |
| Twin gestation | 21.91 (0.41–1177.01) | 3 |
| Prenatal care entry>28 weeks | 43.22 (4.62–404.17) | 3 |
| Interpregnancy interval<18 months | 2.81 (0.86–9.20) | 1 |
| Prior preterm birth | 5.47 (1.80–16.59) | 2 |
Short cervical length was omitted from the model due to small numbers and perfect collinearity with having the outcome.
a
Values in bold indicate p-values<0.05.
b
Indicator variable representing a range of non-obstetrical conditions ascertained at the time of assessment, examples of which include asthma, rheumatoid arthritis, and history of positive tuberculin Tb test.