Bréart ‐ Greece 1992.

Methods	See Bréart ‐ Belgium 1992
Participants	See Bréart ‐ Belgium 1992. Trial in Greece: N = 569 (295 permanent support; 274 control)
Interventions	See Bréart ‐ Belgium 1992. Fathers/family members were not permitted to be present
Outcomes	See Bréart ‐ Belgium 1992, except that mothers' views were not reported
Notes	Epidural analgesia was not available. Not stated if EFM was used routinely Dates of study: not clear, trials ended in 1992 Funding: not clear ‐ "European Community concerted action". Conflicts of interest: Not reported.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Women were 'randomly assigned'. The envelopes were prepared by the co‐ordinating centre. No mention of the process of sequence generation
Allocation concealment (selection bias)	Unclear risk	Sealed envelopes. No mention if they were opaque or consecutively numbered. The process of how the envelopes were opened was not described
Blinding of participants and personnel (performance bias) All outcomes	High risk	No information provided about blinding of participants or personnel, but blinding of participants and personnel is not possible
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No information provided about blinding of outcome assessors
Incomplete outcome data (attrition bias) All outcomes	Low risk	Completion rate for medical record data were 97%. No in‐hospital questionnaire data were available
Selective reporting (reporting bias)	Low risk	All medical record outcomes were reported
Other bias	Low risk	No other sources of bias noted