Bell 2010.

Study characteristics
Methods	Cluster RCT
Participants	Primary care practice‐based research network, USA (Children’s Hospital of Philadelphia Pediatric Research Consortium) 19 450 patients, 12 practices
Interventions	Decision support for patients with asthma to improve adherence to national guidelines, including data‐entry tool, standardized documentation templates, order sets, and action/care plan for families
Outcomes	Process adherence (prescribing, documentation, other)
Co‐Interventions	Educational: Education session for providers in both intervention and control groups Beyond Clinician Education: None
CDSS Features ‐ Acknowledgement of CDSS Required	No
CDSS Features ‐ Other	Appearance differed based on urgency, conveyed patient‐specific information, makes care recommendation, possible to execute desired action, 'push' mode of delivery, targeted underuse
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	N/A
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	N/A
Baseline characteristics similar?	Low risk
Unit of analysis error	Low risk