Table 3.
Logistic regression analysis to assess the association between occiput posterior position and neonatal outcomes, all births
| Outcome | All births | |||
|---|---|---|---|---|
| n | Rate | OR (95% CI) | AORa (95% CI) | |
| Umbilical artery pH < 7.10 | ||||
| Occiput posterior | 56 | 5.5 | 1.48 (1.12–1.96) | 1.28 (0.93–1.74) |
| Occiput anterior | 733 | 3.8 | reference | reference |
| Metabolic acidaemia | ||||
| Occiput posterior | 2 | 0.2 | 1.15 (0.28–4.80) | 0.64 (0.08–5.04) |
| Occiput anterior | 33 | 0.2 | reference | reference |
| Apgar score < 7 at 5 min | ||||
| Occiput posterior | 20 | 1.5 | 2.18 (1.37–3.47) | 1.84 (1.11–3.05) |
| Occiput anterior | 188 | 0.7 | reference | reference |
| Neonatal care | ||||
| Occiput posterior | 38 | 2.9 | 1.87 (1.33–2.62) | 1.68 (1.17–2.42) |
| Occiput anterior | 420 | 1.6 | reference | reference |
| Composite morbidityb | ||||
| Occiput posterior | 47 | 3.6 | 1.87 (1.38–2.54) | 1.66 (1.19–2.31) |
| Occiput anterior | 520 | 2.0 | reference | reference |
Occiput posterior (n 1292) and occiput anterior (n 26,356). Calculations were only made on deliveries with complete registration of data
Unadsjusted (OR) and adjusted odds ratios (AOR) with 95% confidence intervals (CI)
aAdjusted for: for maternal age, nulliparity, pregnancy complication, induction of labour, gestational age at birth, use of epidural analgesia, birth weight and year of delivery
bComposite of any of: Apgar score < 7 at 5 min, pH < 7.00, metabolic acidaemia or neonatal care