Methods	Randomization was based on the woman’s medical file number (odd or even numbers)
Participants	145 women (n = 75 in the active labour management group, n = 70 in the traditional labour management (controls) group)
Interventions	Active management group: amniotomy was performed and oxytocin given as soon as cervical dilatation was less than 1 cm/hour for the first 3 hours of labour. Traditional management group: routine care. Initial oxytocin infusion rate in both groups: 5 mU/minute and increased every 15 minutes up to a maximum rate of40 mU/minute. It was decreased if signs of fetal distress or uterine contractions < 2 minutes apart were present
Outcomes	Mode of delivery; epidural; Apgar < = 6 at 1 minute and 5 minutes; length of labour; meconium; neonatal and maternal morbidity
Notes	Prevention trial. Nulliparous women. Article written in Spanish.
Risk of bias
Bias	Authors’ judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Last digit hospital record number.
Allocation concealment (selection bias)	High risk	The method of allocation was based on the woman’s medical file number (odd or even numbers)
Blinding of participants and personnel (performance bias) All outcomes	High risk	The participants were not blinded to the treatment.
Blinding of outcome assessment (detection bias) All outcomes	High risk	The clinicians were not blinded to the treatment.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No post-randomization exclusions.
Selective reporting (reporting bias)	Low risk	Main outcomes reported.
Other bias	Unclear risk	No information on the number of eligible women.