Workplace interventions focusing on how to plan, organize and design the work environment in hospital settings: A systematic review.

High heterogeneity in interventions, outcomes, and measurement methods made meta-analysis impossible; the synthesis is a narrative summary only. Almost every study bundled multiple interventions together, so the contribution of any single component cannot be separated. Only English-language studies from 2010 onward were included. Drop-out rates in the included studies were not part of the quality assessment. Only five of the twelve RCTs clearly stated that outcome assessors were blinded to the intervention. One study (Michélsen) showed that the same intervention decreased mental strain in physicians and midwives but worsened the social climate among nurses, so positive outcomes in one group do not guarantee positive outcomes in another. Interventions were tailored to specific organizational contexts, which the authors note limits generalizability.

The authors declare that they have no conflict of interest.

Do not read this as evidence that any single workplace change (a lift policy, a job-crafting workshop, a leadership programme) will improve staff outcomes. Nearly every study bundled multiple changes together, and the review itself states that outcome generalizations of single interventions are hard. The positive findings belong to the combinations, not to any one component. Also note that one large RCT found no reduction in back pain or injuries despite improved use of assistive devices, so better equipment use is not the same as fewer injuries.