Kadian 2008.

Methods	Prospective study. Post Graduate Institute of Medical Sciences, India. Setting unclear.
Participants	Inclusion criteria: primigravidae, singleton pregnancy, cephalic presentation unfavourable cervix. Exclusion criteria: unclear.
Interventions	400 women randomised 200 received intracervically administered ISDN, 40 mg and 200 received 0.5 mg PGE2 vaginal gel, which was repeated after 6 hours if Bishop score remained low. Subsequently oxytocin was started after 12 hours in both groups.
Outcomes	Maternal: vaginal delivery not achieved in 24 hours, caesarean section.
Notes	Limited data extraction as report in abstract format only. Authors contacted.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	'randomised.'
Allocation concealment (selection bias)	Unclear risk	No details given.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Full report awaited.
Selective reporting (reporting bias)	Unclear risk	Full report awaited.
Other bias	Unclear risk	Full report awaited.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No mention if suitable dummies used.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No mention if suitable dummies used.