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Table 3 Subgroup analysis: maternal and perinatal outcomes following outpatient vs. inpatient cervical priming with balloon catheters

From: Inpatient versus outpatient induction of labour: a systematic review and meta-analysis

Outcome Studies Outpatient events Inpatient events Estimate (95% CI) I2
Maternal and labour outcomes
Caesarean delivery 4 27/224 (12.05%) 41/194 (21.13%) RR 0.56 (0.37, 0.85) 0
Admission-to-delivery interval 3 NA NA MD − 370.86 min (− 722.54, − 19.19) 41.50
 Mean duration oxytocin infusion 3 N/A N/A 56.18 min (− 41.76, 154.11) 0
Induction-to-delivery interval 2 NA NA −330.42 min (− 540.71, − 120.13) 0
Neonatal outcomes
 Neonatal intensive care unit admissions 4 8/224 (3.57%) 10/194 (5.15%) RR 0.76 (0.30, 1.93) 0
 5-min Apgar score < 7 2 2/98 (2.04%) 1/79 (1.27%) RR 0.94 (0.11, 8.25) 0
 Meconium stained amniotic fluid 2 12/98 (12.24%) 12/79 (15.19%) RR 0.81 (0.37, 1.78) 0
  1. NA not applicable, RR risk ratio, MD mean difference, CI confidence intervals; Bold type indicates statistically significant difference between arms