Predictors and their pooled regression coefficients and ORs for the optimal model
| Candidate predictor | Coefficient | SE | OR | 95% CI | P value |
| Intercept | −39.4 | 3.52 | |||
| Temperature (°C) | 0.987 | 0.095 | 2.68 | 2.23–3.23 | <0.001 |
| Respiratory rate (5 breaths/min) | 0.055 | 0.026 | 1.06 | 1.00–1.11 | 0.04 |
| Maternal fever | 1.44 | 0.612 | 4.21 | 1.27–14.0 | 0.02 |
| Offensive liquor | 0.543 | 0.228 | 1.72 | 1.10–2.69 | 0.02 |
| PROM | 0.360 | 0.192 | 1.43 | 0.98–2.09 | 0.06 |
| Activity (Alert—lethargic) | 0.586 | 0.184 | 1.80 | 1.25–2.58 | 0.002 |
| Activity (Alert—other) | 0.840 | 0.286 | 2.32 | 1.32–4.06 | 0.003 |
| Chest retractions | 0.406 | 0.172 | 1.50 | 1.07–2.10 | 0.02 |
| Grunting | 0.179 | 0.186 | 1.20 | 0.83–1.72 | 0.3 |
Analyses were performed on the complete data after multiple imputation of missing values.
PROM, prolonged rupture of membranes.