Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Lung function
[44] Systematic review	2248 people 7 RCTs in this analysis	Mean peak FEV1 response 85 days with ipratropium plus short-acting beta2 agonist with short-acting beta2 agonist alone Absolute results not reported	WMD 0.07 L 95% CI 0.05 L to 0.09 L P <0.0001	Effect size not calculated	ipratropium plus short-acting beta2 agonist