Comparison 4. Subcutaneous sumatriptan 6 mg (+ optional 6 mg) versus placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Pain‐free at 2 h	3	388	Risk Ratio (M‐H, Fixed, 95% CI)	4.59 [2.85, 7.39]
2 Headache relief at 2 h	5	1728	Risk Ratio (M‐H, Fixed, 95% CI)	2.39 [2.13, 2.69]