“…Starting with hierarchies, this review demonstrates not only their widespread use but also variety and variation. 5,15,16,26,28,29,35,38,39,[64][65][66] These hierarchies, largely originating from non-health care settings, 48,67 are used in health care with minimal empirical Before this review, there have been challenges of the use of hierarchies to predict recommendation effectiveness, 47,48 with arguments that recommendations should be judged on how well they align with the identified risks and context, 46 their likelihood of effecting necessary change, 68 or level of system targeted for change. 47 Our review suggests that hierarchies may not yet be widely used in practice, but with the growing number of variations and lack of consensus, they have the potential to cause confusion for hospital safety teams looking to adopt evidence-based approaches.…”