|Outcomes||3 months||6 months|
|Days without symptoms (%)||11 (8 to 15)||15 (11 to 19)|
|Nights without symptoms (%)||5 (2 to 8)||6 (3 to 9)|
|Days without rescue medications (%)||16 (13 to 20)||19 (14 to 24)|
|Nights without rescue medications (%)||9 (5 to 12)||9 (5 to 13)|
Review: addition of salmeterol leads to improved lung function and fewer exacerbations in symptomatic asthma
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