Effect of Laser Irradiation at Different Wavelengths (940, 808, and 658 nm) on Pressure Ulcer Healing: Results from a Clinical Study

Table 2

Results in patients with pressure leg ulcers.

	Group	Average ± SD		𝑃
		Before therapy	After therapy
Total ulcer surface area (cm^2)	I	30.23±29.17	19.23±23.88	0.005
	II	34.88±36.12	21.07±26.02	0.005
	III	32.87±31.33	8.42±14.23	<0.001
	IV	30.89±31.83	20.07±27.23	0.005

∗Wilcoxon test.