Becker 2003.

Methods	STUDY DESIGN: Parallel group randomised controlled trial LOCATION, NUMBER OF CENTRES: Canada DURATION OF STUDY: 12 months Blinding of outcome assessor could not be obtained
Participants	N SCREENED: Not reported N RANDOMISED: 398 (intervention: 200; control: 198) N COMPLETED: 300 (intervention: 171; control: 129) M = Not reported F = Not reported MEAN AGE: Not reported BASELINE DETAILS: Not reported INCLUSION CRITERIA: 3 to 16 years; ED visit or hospitalisation with asthma EXCLUSION: Not reported
Interventions	EDUCATION GROUP: 4 x weekly education sessions by trained health educator & personalised letters at 2, 4, 6 and 12 months post‐enrolment Setting: Community CONTROL GROUP: Asthma information booklet and usual care TREATMENT PERIOD: 4 weeks FOLLOW‐UP PERIOD: 12 months
Outcomes	Exacerbations (hospital re‐presentation; requirement for additional medical treatment)
Notes	Abstract only
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	Information not available
Allocation concealment?	Unclear risk	Information not available
Incomplete outcome data addressed? All outcomes	High risk	Data analysed as available case (assumed)