Table 2.

Pressure ulcer development by patient group

	Intervention, n = 177	Control, n = 182	P
Primary outcome
PU only sacrum	8	28	.001
(%)	4.5%	15.4%
Secondary outcomes
PU all grades and zones	15	35	.003
(%)	8.5%	19.2%
PU > grade I sacruma	6	17	.021
(%)	3.4%	9.3%
Skin irritation	2
(%)	1.1%

PU, pressure ulcers.

^aAll grade II except 1 grade III in the control group.