Lagerlov 2000.

Methods	RCT unit of allocation: practice unit of analysis: practice power calculation: not done concealment of allocation: not clear follow up of professionals: not clear blinded assessment of outcome: done baseline measurement: done reliable primary outcome measure: done protection against contamination: done analysis appropriate: yes
Participants	199 general practitioners in 32 groups in Norway treating patients with asthma and urinary tract infection
Interventions	1. Educational meetings + audit and feedback + printed educational materials for asthma management 2. Same intervention for the management of urinary tract infection
Outcomes	Professional practice: Change in rate of prescribing antibiotics for asthma Change in rate of prescribing short course antibiotics for urinary tract infections Patient: None
Notes	Used Norwegian national guidelines for the management of UTI and asthma
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear