Comparison 5. NSAIDs versus oral progestogens.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Menstrual blood loss (MBL) (mL/cycle)	2	48	Mean Difference (IV, Fixed, 95% CI)	‐22.97 [‐46.57, 0.62]
2 Number of days' bleeding	2	48	Mean Difference (IV, Fixed, 95% CI)	‐0.41 [‐0.95, 0.13]
3 Proportion with non‐adherence	1	32	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.88 [0.05, 14.78]
4 Total adverse events	1	32	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.54 [0.13, 2.26]
5 Adverse events – headache	1	32	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.63 [0.14, 2.86]
6 Adverse events – abdominal pain	1	32	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.86 [0.15, 4.96]
7 Adverse events – nausea	1	32	Peto Odds Ratio (Peto, Fixed, 95% CI)	1.79 [0.17, 18.65]