Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Healing rates
[7] [9] Systematic review	40 male hospital patients with grade 2 or 3 pressure ulcers expected to stay in hospital for at least 15 days Data from 1 RCT	Median change in total ulcer surface area mean 15 days with air-fluidised support with standard care Absolute results not reported	P = 0.05	Effect size not calculated	air-fluidised support
[7] [9] Systematic review	97 people being cared for at home with grade 3 or 4 ulcers Data from 1 RCT	Median change in total ulcer surface area 36 weeks with air-fluidised support with standard care Absolute results not reported	RR 1.23 95% CI 0.84 to 1.86 This RCT had a 13% withdrawal rate and did not perform an intention-to-treat analysis		Not significant
[8] [9] Systematic review	72 people, 65 people completed study, aged >18 years, acute care, grade 1 to 4 ulcers Data from 1 RCT	Median change in wound surface area –1.2 cm2 with air-fluidised mattress +0.5 cm2 with alternating-pressure mattress covered in foam	95% CI for difference –9.2 cm2 to –0.6 cm2 P = 0.01	Effect size not calculated	air-fluidised mattress