Kasje 2004.

Methods	Cluster RCT Follow up: providers: NOT DONE patients: NOT DONE Blinded assessment: DONE Baseline: NOT DONE Reliable outcomes: DONE Protection against contamination: DONE Overall quality: MODERATE
Participants	245 general practitioners in 27 peer review groups Country: Netherlands Proportion of eligible providers who participated: 93% General practice Academic/Teaching setting: NON‐TEACHING Type of targeted behaviour: PRESCRIBING (chronic heart failure and diabetes mellitus type 2) Complexity of targeted behaviour: LOW
Interventions	1a. CME: 13 peer review groups in arm for condition chronic heart failure: 1‐hr interactive peer group session on management of condition with case based discussions 2a. No intervention control 1b. CME: 14 peer review groups in arm for condition diabetes mellitus type 2: 1‐hr interactive peer group session on management of condition with case based discussions 2b. No intervention control
Outcomes	Professional practice: % of patients receiving prescription of ACE inhibitors Patient: none Seriousness of outcome: MODERATE
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Low risk	A ‐ Adequate