TABLE 3.

Mean ± 1 SD, median, and quartiles of heat hyperemia variables and Mann–Whitney U test results between groups

Heat hyperemia variables (unit)	Pressure injury developed prior to discharge		P	r
	Yes (n = 2)	No (n = 9)
	Mean ± 1 SD Median (1st‐3rd quartile)	Mean ± 1 SD Median (1st‐3rd quartile)
Baseline skin blood flow (perfusion unit)	6.50 ± 4.82 6.50 (4.79‐8.20)	31.62 ± 17.01 28.85 (18.81‐42.19)	.022	0.66
Peak heat hyperemia (perfusion unit)	15.74 ± 9.78 15.74 (12.28‐19.19)	109.26 ± 112.93 60.21 (49.09‐125.50)	.044	0.58
Area under curve (perfusion unit)	1921.71 ± 851.80 1921.71 (1620.55‐2222.86)	13 814.20 ± 22 419.41 4264.54 (3114.79‐9284.22)	.044	0.58