TABLE 3.
Crude and adjusted odds ratios, with 95% CIs, of neonatal outcomes for DDI >20 minutes compared with DDI ≤20 minutes, in operative deliveries after an FBS lactate ≥4.8 mmol/L, estimated by logistic regression.
| Outcome | DDI ≤20 min | DDI >20 min | ||||
|---|---|---|---|---|---|---|
| N (%) | N (%) | OR | 95% CI | aOR | 95% CI | |
| 5‐min Apgar score <7 | 7 (4) | 4 (10) | 2.9 | 0.8–10.6 | 8.1 | 1.1–60.9 |
| Cord pH ≤7.10 | 21 (13) | 6 (20) | 1.7 | 0.6–4.6 | 2.0 | 0.5–8.4 |
| Metabolic acidosis | 3 (2) | 0 (0) | NA | NA | NA | NA |
| Transfer to NICU | 40 (21) | 10 (26) | 1.3 | 0.6–2.9 | 1.1 | 0.4–3.5 |
| Neonatal encephalopathy | 3 (2) | 0 (0) | NA | NA | NA | NA |
| Combined neonatal morbidity | 56 (30) | 14 (36) | 1.3 | 0.6–2.8 | 1.7 | 0.6–4.7 |
Note: Adjusted for maternal age, birthweight, mother's parity (primipara or parous), mode of delivery (operative vaginal delivery or cesarean section), and lactate (as dichotomous variable: 4.8–5.1 mmol/L or ≥5.2 mmol/L).
Metabolic acidosis: umbilical cord pH <7.00 and base deficit in the extracellular fluid ≥12 mmol/L.
Combined neonatal morbidity: 5‐min Apgar score <7, umbilical cord pH ≤7.10, and/or transfer to the neonatal intensive care unit.
Abbreviations: aOR, adjusted odds ratio; CI, confidence intervals; DDI, decision‐to‐delivery interval; FBS, fetal blood sampling; N, number of cases in the group (cases as percentage of the group); NA, not available; NICU, neonatal intensive care unit; OR, odds ratio.