Parotid gland sparing IMRT for head and neck cancer improves xerostomia related quality of life

Radiation Oncology

Table 2 questions related to xerostomia in rest

	Group	Much less %	Less %	Equal %	More %	Much more %	UV p value	MV p value
Do you have a normal amount of saliva?	IMRT	37	39	18	3	4	0.07	0.008
	Control	58	27	8	2	5
Has there been a change lately in the saliva amount?	IMRT	7	15	69	8	1	1.0	0.7
	Control	13	14	56	14	3
		Never %	Sometimes %	Frequent %	Always %
Is your mouth dry when you are not eating?	IMRT	20	43	20	16		0.004	0.001
	Control	9	30	36	25
Do you have problems with your gumbs?	IMRT	69	17	8	5		0.3	0.2
	Control	55	32	8	5
Do you have problems speaking?	IMRT	40	31	24	5		< 0.0001	< 0.0001
	Control	16	28	35	22
Do you have to drink water during the day because of a dry mouth?	IMRT	20	25	28	27		0.001	0.001
	Control	7	15	35	44
Do you have trouble sleeping due to a dry mouth?	IMRT	55	25	12	8		0.5	0.2
	Control	48	26	18	7
Do you have to drink water during the night because of a dry mouth?	IMRT	25	47	19	9		0.05	0.03
	Control	21	32	32	15

Questions and answers related to xerostomia experienced in rest for IMRT group (n = 75) and control group (n = 87). UV: univariate tested (linear by linear association), MV: multivariate tested (ordinal regression, IMRT tested together with N stage, T stage, prior chemotherapy, prior surgery, interval between RT and questionnaire, current smoker yes/no).

ISSN: 1748-717X