TABLE 3.

Comparisons between the three interventional groups (n = 8) at the sacrum

	Intervention
	A	B	C
Loading	Yes	No	Yes
Dressing	No	Yes	Yes
Skin temperature °C (Median)
Baseline	29.4	29.2	29.9
After 2.5 hours	31.0	30.3	31.1
After 3 hours	30.1	29.4	29.7
After 4.5 hours	29.7	29.4	29.6
P value a	<.001	.076	.022
Stratum corneum hydration (AU) (Median)
Baseline	27.7	27.3	33.2
After 2.5 hours	38.2	40.4	47.8
After 3 hours	37.7	37.9	46.4
After 4.5 hours	35.2	35.8	40.3
P value a	.019	.016	.136
Epidermal hydration (AU) (Median)
Baseline	39.7	40.7	41.7
After 2.5 hours	49.3	44.8	49.4
After 3 hours	46.0	45.8	50.5
After 4.5 hours	45.8	44.7	48.8
P value a	.006	.271	.006
Transepidermal water loss in g/m a /h (Median)
Baseline	9.2	9.3	9.1
After 2.5 hours	15.1	13.6	18.0
After 3 hours	8.6	8.7	10.4
After 4.5 hours	11.1	9.2	7.9
P value a	.003	.001	.001
Erythema index (AU) (Median)
Baseline	171	185	186
After 2.5 hours	229	173	226
After 3 hours	196	193	207
After 4.5 hours	155	172	195
P value a	.001	.789	.070
Structural stiffness (Median) (Uf, mm)
Baseline	0.49	0.50	0.47
After 2.5 hours	0.51	0.49	0.51
After 3 hours	0.50	0.45	0.51
After 4.5 hours	0.48	0.48	0.50
P value a	.187	.369	.583
Biological elasticity (Median) (Ua/Uf, mm)
Baseline	0.93	0.91	0.91
After 2.5 hours	0.90	0.93	0.90
After 3 hours	0.92	0.92	0.89
After 4.5 hours	0.93	0.91	0.90
P value a	.054	.348	.985
Roughness (Median) (Rz)
Baseline	50.8	54.5	48.5
After 2.5 hours	45.5	51.3	48.8
After 3 hours	52.8	54.5	49.5
After 4.5 hours	49.5	47.5	47.5
P value a	.495	.110	.522
Epidermal thickness (Median) (mm)
Baseline	0.11	0.12	0.10
After 2.5 hours	0.12	0.10	0.09
After 3 hours	0.10	0.10	0.10
After 4.5 hours	0.11	0.11	0.11
P value a	.647	.080	.127
Interleukin‐1 alpha (Median) (pg/μg)
Baseline	5.7	8.1	8.7
After 3 hours	7.1	7.9	7.7

^a Friedman test.