Ray 1985.

Methods	CBA unit of allocation: region unit of analysis: episode of care power calculation: not done baseline measurement: done characteristics for studies using second site as control:not clear blinded assessment of primary outcome: done protection against contamination: done reliable primary outcome measure: done follow up of professionals: done analysis appropriate: no
Participants	372 physicians in 4 counties in Tennessee, USA treaing patients of all ages with any community acquired infections
Interventions	1. Printed educational materials 2. Academic detailing by pharmacist + printed educational materials 3. Academic detailing by physician counselor + printed educational materials 4. No intervention control
Outcomes	Professional practice: Change in mean number of prescriptions for contraindicated antibiotics and oral cephalosporins. This study examines the persistence of the effects of the intervention one year after completion. Patient: None
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	D ‐ Not used