Black 2008.

Study characteristics
Methods	Design: randomised controlled study Duration: 2 months Setting: trial carried out in New Zealand
Participants	Population: 40 children with asthma Age: 7 to 17 years with symptomatic asthma despite ICS treatment Inclusion criteria: symptomatic asthma despite ICS treatment Exclusion criteria: not stated Percentage withdrawn: not recorded Allowed medication: none recorded Disallowed medication: none recorded
Interventions	Intervention: inhaler alarm intervention (n = 20) Control: usual care (n = 20)
Outcomes	AQLQ, pre‐bronchodilator FEV1, use of salbutamol, adherence to inhaled steroid
Notes	Type of publication: abstract only
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No details
Allocation concealment (selection bias)	Unclear risk	No details
Blinding of participants and personnel (performance bias) All outcomes	High risk	No blinding of participants or personnel
Blinding of outcome assessment (detection bias) All outcomes	High risk	No blinding of outcome assessor described; adherence measured by device but assessor may be aware of group allocation
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No data on attrition
Selective reporting (reporting bias)	Unclear risk	Conference abstract; no trial registration identified. Study reported only as a conference abstract from 2008. Therefore, limited details about methods and outcomes, in particular, no measure of variance for the AQLQ.