3.7 Emergency Caesarean section
Overall, 278 women had an emergency caesarean section (27.2%), 176/810 (21.7%) women in the low-volume IV fluids group, and 102/213 (47.9%) women in the high-volume IV fluids group. The unadjusted logistic regression showed that women in the high-volume IV fluids group were more likely to have an emergency caesarean section than women in the low-volume IV fluids group (ORunadj 3.3; 95% CI: 2.4, 4.5). In the adjusted model, emergency caesarean section remained associated with high-volume IV fluids after adjusting for maternal age, birth weight, BMI, Intrapartum IV antibiotics for infection/suspected infection, maternal origin, parity, previous caesarean section, length of active labour, and model of care (ORadj 1.99; 95% CI: 1.4, 2.8) (Table S2). Additionally, women born in South-East Asia (ORadj 1.5; 95% CI: 1.008, 2.3), duration of active labour ≥ 12 hours (ORadj 1.6; 95% CI: 1.04, 2.5), and neonatal birthweight ≥ 4000 grams (ORadj 2.4; 95% CI: 1.3, 4.4) were associated with emergency caesarean section in the adjusted model (Table S2).