Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Pressure of ulcers
Systematic review	40 people Data from 1 RCT	Development of pressure ulcers with foam and fibre replacement mattress consisting of 5 sections with 4-inch (10 cm) thick dimpled foam mattress Absolute results not reported	RR 0.42 95% CI 0.18 to 0.96 NNT for 10 to 21 days' treatment: 3 95% CI 2 to 25	Moderate effect size	foam and fibre replacement mattress consisting of 5 sections