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Q What is the relative efficacy of β agonists delivered by metered dose inhaler (MDI) with a valved holding chamber (VHC) or by nebuliser in infants and preschool children with acute exacerbations of wheezing or asthma?
Medline (1966–2003), EMBASE/Excerpta Medica (1980–2003), Cochrane Controlled Trials Register; and reference lists of included studies, reviews, and texts.
Study selection and assessment:
randomised controlled trials (RCTs) in any language that compared β agonist delivery by MDI + VHC with delivery by nebuliser in infants and children <5 years of age who presented to the emergency department (ED) or equivalent setting with acute exacerbation of wheezing or asthma. Exclusion criterion: studies of admitted patients. Methodological quality of individual studies was assessed using the 5 point Jadad scale …
For correspondence: Dr J A Castro-Rodriguez, Department of Pediatrics, School of Medicine, University of Chile, Santiago, Chile.
Source of funding: no external funding.