Comparison 29. (5.5) Nitric oxide versus intracervical Foley catheter (all women, previous cs, unfavourable cervix).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Caesarean section	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	1.0 [0.39, 2.59]
2 Oxyocin augmentation	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	1.65 [1.17, 2.32]
3 Uterine rupture	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
4 Epidural analgesia	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	1.0 [0.39, 2.59]
5 Instrumental vaginal delivery	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	0.8 [0.23, 2.76]
6 Meconium‐stained liquor	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	2.0 [0.19, 21.18]
7 Apgar score < 7 at 5 minutes	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	1.67 [0.95, 2.93]
8 Neonatal intensive care unit admission	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	2.5 [0.51, 12.14]
9 Maternal side effects (nausea and vomiting)	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	3.0 [0.33, 27.63]
10 Maternal side effects (headache)	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	3.33 [0.99, 11.22]
11 Postpartum haemorrhage	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	2.0 [0.90, 4.43]
12 Women not satisfied	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	1.75 [0.56, 5.51]
13 Other maternal side effect (puerperal pyrexia)	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	0.42 [0.16, 1.07]