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. 2005 Jan 24;2005(1):CD000451. doi: 10.1002/14651858.CD000451.pub2

Boulvain 1998.

Methods Random allocation based on a computer generated sequence. Concealment of allocation by consecutively numbered, sealed, opaque envelopes, opened by the delivery room nurse during a telephone call with the obstetrician. Randomly permutated blocks of 6 and 8, stratified by hospital (3 participating hospitals and 29 obstetricians).
Participants Women for whom non‐urgent induction of labour was medically indicated. A date for formal induction of labour was given prior to randomisation, at least 3 days and not later than one week after inclusion.
Interventions Intervention arm: sweeping of membranes. If not possible, the cervix was either dilated by the examining finger, or a cervical 'massage' was performed. 
 Control arm: cervical assessment by Bishop score.
Outcomes Formal induction of labour; delay before spontaneous labour onset; maternal discomfort; bleeding; other side‐effects during or after the procedure; caesarean section; forceps/vacuum; requirement for analgesia during labour; neonatal morbidity.
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Low risk A ‐ Adequate