Skip to main content
. 2009 Oct 7;2009(4):CD003246. doi: 10.1002/14651858.CD003246.pub2

Rydhstrom 1991.

Methods RCT.
Participants 277 women. PROM, primips, GA 36‐41 wks, singleton, cephalic, cx dilatation < 4 cm, admission within 3‐5 hrs of PROM.
Interventions IV oxytocin 5‐7 hrs post ROM 
 vs 
 expectant management x 56‐80 hrs, then IV oxytocin if still not in labour.
Outcomes C/S, perinatal death, epidural analgesia, instrumental vaginal delivery, Apgar score < 7 at 5 minutes, Apgar < 7 at 1 minute, chorioamnionitis, endometritis, neonatal infection, neonatal jaundice, retained placenta.
Notes 'Simple randomisation'. Sealed envelopes.
Risk of bias
Bias Authors' judgement Support for judgement
Adequate sequence generation? Unclear risk Described as "simple randomisation".
Allocation concealment? Unclear risk Sealed envelopes in labour ward.
Blinding? 
 Women High risk Not feasible.
Blinding? 
 clinical staff High risk  
Blinding? 
 outcome assessor High risk  
Incomplete outcome data addressed? 
 All outcomes High risk Attrition not balanced between groups.
Free of selective reporting? Low risk  
Free of other bias? Unclear risk Long recruitment period and high non‐participation rate.