Table 4.
Maternal risk factors to deliver in maternity units over 1000 deliveries/yrs
| Maternal risk factors | Total n (%) | Maternity units over 1000 deliveries/yrs n (%) | Maternity units under 1000 deliveries/yrs n (%) | Odds Ratio (95% CI) | p-value |
|---|---|---|---|---|---|
| Diabetes | 239 (1.9) | 123 (2.8) | 116 (1.4) | 1.99 (1.54–2.57) | < 0.001 |
| Hypertension | 437 (3.5) | 205 (4.7) | 232 (2.8) | 1.67 (1.38–2.02) | < 0.001 |
| Preeclampsia | 279 (2.2) | 102 (2.3) | 177 (2.2) | 1.07 (0.83–1.37) | 0.234 |
| Premature rupture of membranes | 887 (7.1) | 323 (7.3) | 564 (6.9) | 1.06 (0.92–1.23) | 0.206 |
| Twin pregnancy | 426 (3.4) | 265 (6.0) | 161 (2.0) | 3.18 (2.60–3.88) | < 0.001 |
| Fetal distress | 675 (5.4) | 294 (6.7) | 381 (4.7) | 1.46 (1.24–1.71) | < 0.001 |
| Preterm delivery | 231 (1.8) | 116 (2.6) | 115 (1.4) | 1.89 (1.46–2.45) | < 0.001 |