In addition, a hand search through reviews, conference proceedings, and the reference lists of the included studies was performed to identify additional studies.
Six electronic databases were consulted: Cochrane Library, EMBASE, PubMed (Medline), CINAHL (EBSCOhost interface), Science direct, and Web of Science. Secondary outcomes included costs and patient comfort. The primary outcome was the incidence of pressure ulcers. The aims of this study were to identify, assess, and summarise available evidence about the effectiveness of static air mattress overlays to prevent pressure ulcers.
