McColgin 1990b.

Methods	Random allocation based on a computer generated sequence. Method of concealment not described.
Participants	Pregnant women at 38 weeks, with gestational age ascertained by menstrual dates, early examination, and sonography before 20 weeks. Women with closed cervix were included. Exclusions after randomisation (29 women). Past history of caesarean section (17) in both groups. In the stripping group, 5 women were excluded for various reasons (abnormal presentation (2), dates unclear (1), pain (1), breast cancer (1)). In the control group, 7 women were excluded for various reasons (labour induction for maternal fetal indications (3), non vertex (1), dates (1), inadvertent stripping (1), renal disease (1)).
Interventions	Weekly stripping of membranes (or stretching of the cervix then stripping if cervix was closed) or weekly pelvic examination for cervical assessment.
Outcomes	Mean delay to delivery; delivery within 1 week; delivery at or beyond 42 weeks.
Notes	Same women as McColgin 1990a? Letter sent to clarify this and the exclusions.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear