Angunawela 1991.

Methods	RCT unit of allocation: district hospitals and health units unit of analysis: episodes of care power calculation: not done concealment of allocation: not clear follow up of professionals: not clear blinded assessment of primary outcomes: not clear baseline measurement: done reliable primary outcome measure: not clear protection against contamination: done analysis appropriate: no
Participants	43 physicians and assistant medical practitioners in 15 outpatient clinics of institutions where drugs prescribed free of charge in Sri Lanka, treating patients of all ages for community acquired infection
Interventions	1. Printed educational materials 2. Printed educational materials + educational meeting 3. No intervention control
Outcomes	Professional practice: change in rate of prescribing several antibiotic classes Patient: none
Notes	Educational materials based upon Drug Information Bulletin produced by the Department of Pharmacology, Peradeniya and the Ministry of Health in Sri Lanka
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear