Dolovich 1999.

Methods	RCT unit of allocation: region unit of analysis: prescriptions power calculation: not done concealment of allocation: done follow up of professionals: not clear blinded assessment of primary outcomes: done baseline measurement: done reliable primary outcome measure: done protection against contamination: done analysis appropriate: no
Participants	1215 family physicians and pediatricians in 8 regions in Ontario, Canada prescribing antibiotics for children with acute otitis media
Interventions	1. Academic detailing by pharmaceutical detailer + educational materials 2. Routine pharmaceutical detailing
Outcomes	Professional practice: Change in market share of recommended first line antibiotic (amoxicillin) Change in market share of recommended second line antibiotics (pivampicillin, cotrimoxazole and erythromycin‐sulfamethoxazole) Patient: None
Notes	Description of development of the evidence based guideline for management of acute otitis media not provided
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate