Comparison 2. Balloon (Foley or ATAD) versus vaginal prostaglandin E2: all primiparae.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Vaginal delivery not achieved in 24 hours	1	330	Risk Ratio (M‐H, Fixed, 95% CI)	1.01 [0.83, 1.23]
2 Uterine hyperstimulation with FHR changes	1	330	Risk Ratio (M‐H, Fixed, 95% CI)	0.05 [0.00, 0.85]
3 Caesarean section	5	828	Risk Ratio (M‐H, Random, 95% CI)	0.89 [0.59, 1.33]
4 Serious neonatal morbidity/perinatal death	1	330	Risk Ratio (M‐H, Fixed, 95% CI)	0.17 [0.01, 4.24]
5 Serious maternal morbidity or death	1	60	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]