Variation of Energy in Photobiomodulation for the Control of Radiotherapy-Induced Oral Mucositis: A Clinical Study in Head and Neck Cancer Patients

Table 4

Occurrence of oral mucositis.

Oral mucositis		Group
		0.25 J	1.0 J
Incidence	No	4	11	0.04
	Yes	26	17
Onset	Early (1st week)	8	12	0.27
	None or timely (2nd week or after)	22	16
Duration (weeks)	Mean (±SEM)	2.9 (0.3)	2.5 (0.5)	0.51
Severity	None, grades 1 or 2	24	19	0.37
	Grades 3 or 4	6	9

Chi-square test; unpaired t-test.