Summarize this in one short sentence. Data about the quality of life (e.g. quality-adjusted life years) and indirect cost were not collected in this study. A costeffectiveness analysis was not performed due to the lack of these data. In this study, the cost analysis was limited to the purchase costs and multiple lifespans of the mattresses. The options in the participating nursing homes were purchasing or renting mattresses. The maintenance costs were included in a rental contract and excluded when purchasing alternating air pressure mattresses. The maintenance service costs were not included in the cost analysis. Thus, the direct cost difference between the two mattresses might be underestimated. Further research should focus on reporting economic data (direct and indirect cost) and performing a cost-effective analysis to identify which support surfaces are the most effective in preventing pressure ulcers?