El Khouly 2017.

Study characteristics
Methods	RCT
Participants	Inclusion criteria: singleton pregnancy, cephalic presentation, GA > 28 weeks and the BS < 6. Exclusion criteria: contraindication vaginal delivery, EFW > 4500 g, a previous uterine scar, clinically significant cervical or vaginal infection, chorioamnionitis, unexplained vaginal bleeding, low‐lying placenta, abnormal cervical anatomy or cervical cerclage.
Interventions	Foley catheter (n = 36): 18F, 30 mL, max of 12 hours Foley catheter + oxytocin (n = 36): 18F, 30 mL balloon, oxytocin, Foley max of 12 hours) Oxytocin alone (n = 36): increased by 2 mU/minute at 30‐minute intervals until adequate uterine activity was maintained, max dose 32 mU/minute, AROM at 3 cm
Outcomes	Duration and dose of required oxytocin, induction to delivery interval, mode of delivery and reason (in case of CS), maternal and neonatal complications
Notes	Setting: Menoufia University Hospital, Egypt Study period: between January 2015 and February 2016. Funding: no funding Declarations of interest: none declared
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated sequence
Allocation concealment (selection bias)	Low risk	Sequentially‐numbered opaque, sealed envelopes
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not feasible due to nature of intervention
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Low risk	Although ITT is not mentioned, figure 1 and results are plausible for ITT, all cases analysed, no missing data described
Selective reporting (reporting bias)	Low risk	All pre‐specified outcomes were reported in results
Other bias	Low risk	No other bias detected