Hudon 1999.

Study characteristics
Methods	RCT. No details on the method of randomisation or on concealment of the allocation.
Participants	Term, unfavourable cervix (BS < 5).
Interventions	Foley catheter placed above the internal os and inflated with 40 mL left in place for a max of 16 hours (56 women); intracervical PGE2 (0.5 mg), repeated if BS unfavourable (55 women). Oxytocin was given after achievement of cervical ripening.
Outcomes	CS.
Notes	Setting: USA Study period: not reported Funding: not reported Declarations of interest: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Only reported women were randomised
Allocation concealment (selection bias)	Unclear risk	Not reported
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	Unclear risk	Insufficient information to judge
Selective reporting (reporting bias)	Unclear risk	Insufficient information to judge
Other bias	Unclear risk	Abstract only