Meyer 2001.

Methods	RCT unit of allocation: primary healthcare clinics unit of analysis: episodes of care power calculation: done (available in How to investigate drug use in health facilities: selected drug use indicators. Geneva: World Health Organisation 1993) 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	457 primary healthcare nurses in 22 clinics in South Africa treating patients of all ages with upper respiratory infection and diarrhoea
Interventions	1. Educational meetings 2. No intervention control
Outcomes	Professional practice: Change in rate of prescribing antibiotics Patient: None
Notes	Content of workshop based on World Health Organisation Guide to Good Prescribing
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear