Baker 1987.

Methods	Type of targeted behaviour: decrease in test ordering (lumbar x‐rays) Study design: ITS Country: USA
Participants	Setting: hospital Number of providers: not reported; Number of tests: 1443 in control year and 759 in experimental year Condition: acute LBP
Interventions	Professional intervention (reminder: note on x‐ray referral form)
Outcomes	Professional practice: number of x‐rays ordered; proportion of appropriate x‐rays Patient level: none
Notes	Justification for intervention: not reported Intervention fidelity: not reported