Table 1.

Patient characteristics

Parameters
Median age (IQR)	66 (57, 68)
Sex (female/male)	2/19
ECOG Performance Status (0/1/2)	16/5/0
Clinical stage (I/II/III/IV)a	3/6/5/7
T status (1/2/3/4)	5/5/2/9
N status (0/1/2/3)	5/13/3/0
M status (0/1LYM)	14/7
Location of M1LYM (supraclavicular/lower cervical/both)	5/1/1
Resectability (resectable/unresectable)	10/11

IQR = interquartile range, ECOG = Eastern Cooperative Oncology Group. M1LYM means patients with supraclavicular and lower cervical lymph nodal metastasis included in the irradiation fields. Unresectable status indicates patients with the tracheal invasion or major vessel involvement of the primary tumor or metastatic lymph nodes.

^aClassification of clinical stage was based on the Union for International Cancer Control TNM Classification of Malignant Tumors, 7th edition.