Table 6.

Patient characteristics of the four-group model

	Symptom burden								P * (medium vs. low)	P * (high vs. low)
	Low (n = 37)		Medium (n = 57)		High (n = 31)		Stable (n = 5)
	n	%	n	%	n	%	n	%
Treatment
Radiotherapy	21	58.33	19	34.55	12	38.71	.	.	.025	.109
Chemoradiotherapy	15	41.67	36	65.45	19	61.29	5	100.00
Age
< 60 years	24	64.86	21	36.84	15	48.39	1	20.00	.008	.171
≥ 60 years	13	35.14	36	63.16	16	51.61	4	80.00
Sex
Women	13	35.14	9	15.79	10	32.26	.	.	.030	.803
Men	24	64.86	48	84.21	21	67.74	5	100.00
Tumor stage
0/I/II	29	87.88	34	66.67	19	61.29	2	40.00	.028	.014
III/IV	4	12.12	17	33.33	12	38.71	3	60.00
Cancer site
Pharynx	18	50.00	23	40.35	16	51.61	5	100.00	.533	.807
Tongue	1	2.78	16	28.07	6	19.35	0	0.00	.002	.024
ECOG PS
0	32	94.12	39	69.64	15	50.00	2	40.00	.006	< .0001
≥ 1	2	5.88	17	30.36	15	50.00	3	60.00
Total radiation dose
≤ 60 Gy	25	67.57	37	66.07	16	51.61	3	60.00	.881	.181
> 60 Gy	12	32.43	19	33.93	15	48.39	2	40.00

^*Chi square test