Comparison 7. Adverse events.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Dry mouth	4		Odds Ratio (M‐H, Random, 95% CI)	Subtotals only
1.1 vs placebo	3	1791	Odds Ratio (M‐H, Random, 95% CI)	5.35 [3.27, 8.76]
1.2 vs ipratropium bromide	1	535	Odds Ratio (M‐H, Random, 95% CI)	2.10 [1.05, 4.18]
1.3 vs salmeterol	1	807	Odds Ratio (M‐H, Random, 95% CI)	5.08 [2.22, 11.64]