1. Antifibrinolytic agent vs control: menstrual blood loss.

Study	Comparison	Outcome	Intervention group			Control group			Finding (e.g. P value for difference between groups, as reported in primary study)
			Intervention	n	Result (mean (SD))	Intervention	n	Result (mean (SD))
Jaisamrarn 2006	TXA vs progestogens or NSAIDs	PBAC score	TXA 3 g daily	56	204.4 (SD 255.7)	Norethisterone 10 mg daily (luteal phase)	56	298.7 (SD 141.3)	P < 0.0001
						Mefenamic acid 1.5 mg daily	56	278.3 (SD 164.2)	P < 0.001
Preston 1995	TXA vs luteal phase MPA	Mean loss by alkaline haematin method (end score)	TXA 4 g daily	25	97 (SD 89)	Norethisterone (21 participants) 5 mg taken twice daily on days 19 to 26 of cycle.	21	208 (SD 135)	P = 0.001