| Methods |
Women 'randomly allocated' to 2 groups. Method of randomisation not reported |
| Participants |
160 women attending a family planning clinic in Tianjing, China. Women had regular menstrual periods and attended the clinic within 72 h of a single act of unprotected intercourse |
| Interventions |
Mife 50 mg vs Mife 25 mg single dose |
| Outcomes |
Observed number of pregnancies, side effects and changes in menstrual pattern |
| Notes |
Post‐randomisation exclusions or loss to follow‐up not reported Observed pregnancy/total number women: Mife 50 mg 0/79; Mife 25 mg 2/78 Change in menstrual pattern: not reported |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Unclear risk |
Mentioned randomisation but description not adequate |
| Allocation concealment (selection bias) |
Unclear risk |
Method of allocation concealment not mentioned |
| Blinding (performance bias and detection bias)
All outcomes |
Unclear risk |
Not mentioned |
| Incomplete outcome data (attrition bias)
All outcomes |
Unclear risk |
Post‐randomisation exclusions or loss to follow‐up not reported |
| Selective reporting (reporting bias) |
Low risk |
Reported planned outcomes |
| Other bias |
Low risk |
None detected |
