Table 2 Intrapartum factors according to delivery route
CS (n = 296) | VD (n = 302) | univariate | multivariable | |||||
|---|---|---|---|---|---|---|---|---|
p-value | OR | 95% CI | p-value | OR | 95% CI | |||
Gestational age (days, median) | 285 | 281 | < 0.001 | 1.06 | 1.04–1.08 | < 0.001 | 1.08 | 1.03–1.12 |
Spontaneous contractions at admission (n) | 106 | 195 | < 0.001 | 0.30 | 0.21–0.42 | |||
PROM (n) | 101 | 66 | 0.001 | 1.85 | 1.29–2.67 | |||
IOL (PG or balloon) (n) | 90 | 42 | < 0.001 | 2.71 | 1.80–4.07 | |||
Indication for IOL | ||||||||
Postterm pregnancy | 28 | 7 | ||||||
PROM | 22 | 15 | ||||||
Pre-eclampsia or HT | 16 | 7 | ||||||
Diabetes | 6 | 6 | ||||||
LGA | 7 | 0 | ||||||
SGA | 0 | 2 | ||||||
Other | 11 | 5 | ||||||
Cervix dilatation at admission (mean, cm) | 1.5 | 2.6 | < 0.001 | 0.57 | 0.48–0.67 | 0.002 | 0.65 | 0.50–0.85 |
Head position in birth canal at admission (mean, cm) | −2.7 | −2.1 | < 0.001 | 0.47 | 0.36–0.60 | 0.003 | 0.56 | 0.39–0.82 |
Chorioamnionitis (n) | 95 | 10 | < 0.001 | 10.9 | 5.01–23.6 | < 0.001 | 21.3 | 6.86–65.9 |
Fetal malposition (n) | 148 | 7 | < 0.001 | 42.0 | 19.2–91.9 | < 0.001 | 70.9 | 24.2–207 |
Oxytocin during labor (n) | 281 | 220 | < 0.001 | 6.98 | 3.92–12.5 | |||
Amniotomy in labor (n) | 129 | 148 | 0.183 | |||||
CTG abnormality (n) | 123 | 12 | < 0.001 | 17.3 | 9.28–32.2 | |||
Fetal blood sample (n) | 103 | 15 | < 0.001 | 10.2 | 5.78–18.0 | |||
Meconium-stained fluid (n) | 101 | 40 | < 0.001 | 3.31 | 2.20–5.00 | |||
Use of IUPC (n) | 202 | 10 | < 0.001 | 63.4 | 32.2–125 | |||
Epidural analgesia (n) | 280 | 214 | < 0.001 | 7.20 | 4.10–12.6 | |||
PCB (n) | 65 | 102 | 0.001 | 0.55 | 0.38–0.79 | |||
Duration of delivery (mins, median) | 960 | 620 | < 0.001 | 1.19 | 1.14–1.23 | |||