Predictive factors for intrapartum cesarean section in grand multiparous
compared to primiparous and multiparous women
Abstract
Objective: To identify predictive factors for intrapartum
cesarean section (CS) in grand multiparous women and compare them with
primiparous and multiparous women. Design and Setting: A
historical cohort study in a single university-affiliated tertiary
medical center. Population: All women with singleton
pregnancies resulted in live births (n = 74,848) between 2011-2018.
Women were categorized into three groups: primiparous (PP, first birth),
multiparous (MP, 2–4 births), and grand multiparous (GMP, ≥5 births).
Methods: We analyzed delivery characteristics and indications
for intrapartum emergency CS. We then used multivariate logistic
regression to identify factors associated with an increased risk of
emergency CS. Main Outcome Measures: Proportion of intrapartum
CS and its indications among the parity groups. Results:
Intrapartum CS rates were significantly higher in the PP group (13.2%)
compared to MP (9.4%) and GMP + GGMP (6.5%) (p <.001).
Non-reassuring fetal heart rate (NRFHR) was the leading indication for
intrapartum CS in GMP women (71.1%), followed by failure to progress
(21.0%), suspected placental abruption (4.4%), suspected uterine
rupture (2.6%), and failed instrumental delivery (0.9%). Multivariate
analysis identified the following factors as significantly associated
with increased risk of emergency CS: assisted reproductive technology
(aOR = 2.09, 95% CI 1.88–2.32), prolonged latency >12 hours
post-rupture of membranes (aOR = 2.08, 95% CI 1.85–2.34), tobacco use
(aOR = 1.49, 95% CI 1.26–1.75), and diabetes (aOR = 1.46, 95% CI
1.32–1.62). Conclusions: Grand multiparous women had a lower
risk for intrapartum CS compared to primiparous and multiparous women.
Non-reassuring fetal heart rate was the most common indication for
emergency CS. Assisted reproductive technology (ART), prolonged rupture
of membranes (ROM) latency, tobacco use, and diabetes were independent
predictors of intrapartum CS.