“…(17,18,45,46) This can be attributed to different factors, including the heterogeneity and complexity of provider behaviour change interventions and the poor reporting of interventions in primary studies (17,30) compounded by the limited use of theory in the design, implementation, evaluation and reporting of A&F interventions. (3,30,(47)(48)(49)(50)(51) Given that signi cant resources, including clinicians time are increasingly invested in NCAs, greater research effort needs to be devoted to understand and improve the consistency and magnitude of the NCAs' effects. (2,6,14,17,21,26,29) This research should identify underlying mechanisms through which feedback is effective and understand ingredients required to produce the most desirable effects of A&F as a QI tool.…”