Table 1. Patient characteristics.

No.	Sex	Age	Primary tumour site	BW before RT(kg)	ΔBW during RT (kg)	Total dose (cGy)	Fr.
1	M	76	Tongue	53	0.7	6000	30
2	M	80	Parotid gland	53.9	0.4	6000	30
3	M	63	Oropharynx	62.4	1.6	5040	28
4	M	73	Right retromolar trigone	76.3	-6.4	7000	35
5	M	65	UPMN (Left level IV-V)	46.5	-1.8	6000	30
6	M	53	Floor of Mouth	69.2	-1.7	6000	30
7	M	79	Hypopharynx	59.7	-3.7	7000	35
8	M	64	Glottis	57	-3.6	6600	33
9	M	72	Hypopharynx	59.5	-7.4	7000	35
10	M	61	Subglottis	66	-6	7000	35
11	M	58	Hypopharynx	54.8	-3.8	6600	33
12	M	57	Submandibular gland	53	2	6600	33
13	F	59	Supraglottis	60	-1	6600	33
14	M	69	Tonsil	69.8	0.4	6000	30
15	F	52	Nasopharynx	59	-1	7000	35
16	M	54	Larynx	64	-3	7000	35
17	M	49	Soft palate	72	1	7000	35
18	M	57	Hypopharynx	64	-3	3800	19
19	M	55	Tonsil	61.3	-5.6	7000	35
20	M	73	Supraglottis	66	-2.5	6600	33
21	M	31	Parotid gland	70	-2	6000	30
22	M	66	Supraglottis	44	0	1200	6

Abbreviations: No., registration number; BW, body weight; ΔBW, BW variation; RT, radiotherapy; Fr., fractionation; UPMN, unknown primary metastatic lymph node