BackgroundHealth workers are at high risk of developing musculoskeletal pain (MSP). This study aimed to evaluate a multi-faceted intervention in two public tertiary hospitals, encompassing three levels of prevention and health promotion to prevent and manage MSP.MethodsA two-armed cluster randomized controlled trial, with a late intervention control group was performed. Clusters were independent hospital units, and participants were the nursing staff. The intervention comprised three components: participatory ergonomics, case management, and health promotion. The control group received usual occupational health care. The intervention lasted one year and data were collected at baseline, 6 and 12 months follow-up. Primary outcomes were self-perceived MSP and its associated sickness absence. The process evaluation included recruitment, context, reach, dose administered and received, fidelity, satisfaction, implementation strategy, and discussion groups of experts and participants.ResultsEight clusters, including 445 participants, were randomized. In the intervention group a 20% statistically significant reduction of neck, shoulders and upper back pain compared to the control group (OR=0.37; 95% CI=0.14–0.96) was observed at 12 months follow-up. We found no significant differences in incidence and duration of sickness absence. Organizational culture (secondary outcome) improved significantly in the intervention group in the domains of ‘formal safety audits’, ‘availability of information for safety at work’, and ‘involvement of workers in decisions that affect their safety and health’ compared to the control group. The intervention was implemented with 96.6% fidelity, and participants’ adherence was 75.5%. Participant’s satisfaction was 9.1/10.ConclusionsThis intervention showed effectiveness to reduce MSP and improve organizational culture, through to an integral management of MSP. Although our results are modest, strategies should focus on multi-faceted interventions, and occupational health services might be excellent opportunity for.
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