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QUESTION: What is the effectiveness of regular inhaled long acting β2 agonists compared with inhaled short acting β2 agonists in adults and children with chronic asthma?
Data sources
Studies were identified using the Cochrane Airways Review Group register, which is derived from searching Medline, CINAHL, and EMBASE/Excerpta Medica. In addition, bibliographies of relevant studies were scanned, key respiratory care journals were hand searched, and experts were contacted.
Study selection
Randomised controlled trials of ≥2 weeks duration were selected if they compared a regular inhaled long acting β2 agonist with a regular inhaled short …
Footnotes
Source of funding: Commonwealth Department of Health and Aged.
For correspondence: Professor E H Walters, Clinical School, University of Tasmania, Hobart, Tasmania, Australia.Haydn.Walters{at}utas.edu.au