Rafter 2011.

Methods
Participants
Interventions
Outcomes
Notes	Email sent to author, requesting more information about the trial. Nil response to date

Abbreviations

> = more than
 ≥ = greater than or equal to
 < = less than
 ≤ = less than or equal to
 A&E = Accident and Emergency department
 AP = alternating pressure
 AWS = airwave system
 BMI = body mass index
 CF = convoluted foam
 CRN = clinical research nurse
 FDA = Food and Drug Administration
 GA = general anaesthetic
 h = hour(s)
 ICU = intensive care unit
 ITT = intention‐to‐treat analysis
 LAL = low air loss
 LCR = large cell ripple
 LOS = length of stay
 n = number in sample/group
 NBE = non‐blanchable erythema
 NS = not statistically significant
 OR = odds ratio
 PRD = pressure reducing device
 SF = solid foam
 vs = versus
 y = year(s)