Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Mean menstrual blood loss
RCT 3-armed trial	81 women In review	Mean menstrual blood loss with etamsylate with mefenamic acid Absolute results not reported	WMD –51 mL 95% CI –96 mL to –6 mL 27% of women withdrew from the RCT before its completion; the RCT also made no adjustment for the multiple treatment comparisons involved	Effect size not calculated	mefenamic acid