Oakeshott 1994.

Methods	Type of targeted behaviour: decrease in test ordering (x‐rays, various) Study design: cluster RCT Country: UK
Participants	Setting: primary care 62 practices. Analysis was of 2578 x‐ray examinations Condition: not specified as data collected only at test level, related to x‐rays of chest, limbs and joints, and spine
Interventions	1. Professional intervention (distribution of educational materials) 2. Control (not specified)
Outcomes	Professional practice: number of radiology requests within 9 weeks; percentage of radiology requests that conform to guidelines Patient: none
Notes	Justification for intervention type: not reported Intervention fidelity: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	From report: “Practices were stratified by number of partners and number of radiographic examinations requested, and randomized into two groups.”
Allocation concealment?	Unclear risk	Not reported
Blinding? All outcomes	Low risk	Blinding for conformity with guidelines. No blinding for other outcomes, but not likely to be influenced by lack of blinding
Incomplete outcome data addressed? All outcomes	Low risk	No missing outcome data
Free of selective reporting?	Unclear risk	Insufficient information provided
Free of other bias?	Low risk