Comparison 6. Population.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Asthmatic Adults Only	6	441	Odds Ratio (M‐H, Random, 95% CI)	0.58 [0.32, 1.07]
2 Asthmatic Children Only	6	409	Odds Ratio (M‐H, Random, 95% CI)	0.40 [0.17, 0.94]