Cost-effectiveness and return-on-investment of a participatory ergonomics intervention among childcare workers: An economic evaluation in a randomized controlled trial

OBJECTIVES: To evaluate the cost-effectiveness and return-on-investment (ROI) of 20-week ergonomic intervention to reduce physical exertion at work than usual-practice among childcare workers.

METHODS: 190 workers from 16 institutions were cluster-(institute)-randomized to intervention (n = 96) and usual-practice (n = 94) group. The intervention group participated in three workshops to develop/implement action plans improving ergonomic conditions. The rating of physical exertion (RPE) was measured at baseline and 20-weeks. Employer-perspective-based costs of intervention, absenteeism, and presenteeism were estimated.

RESULTS: Although statistically non-significant, one-unit reduction in RPE was associated with saving of 592 EUR/worker. Per-EUR invested by the employer was associated with 1.6 EUR (95%CI:-3.1;6.5) return in the intervention than usual practice.

CONCLUSION: The intervention tended to gain monetary benefit for the employer. The results should be replicated in larger populations for improved precision of economic evaluation estimates.

TRIAL REGISTRATION: ISRCTN10928313.