Conclusion
Our study strengthens previous works on the usefulness of low-cost stair-use interventions at worksites using signage. Based on process evaluation using the RE-AIM framework, co-producing the intervention with employees was associated with the intervention’s effectiveness, adoption, and implementation. Effects of intervention on stair use amongst various genders, ages, and statuses of visitors, as well as effects on health outcomes, need to be elucidated in future studies.