In 2012, University Hospitals Bristol invested in training, education and pressure redistributing equipment and made a 50% reduction in the occurrence of pressure ulcers. The results came at a high financial cost because of the increase in mattress rentals. In 2014 the trust began using the SSKIN tool to identify patients at risk of pressure ulceration and began using a mattress matrix that ensured that appropriate mattresses were being provided. The results saw a drop in mattress rentals within one month as well as a sustained reduction in pressure ulcer incidence.