Table 1.

Demographic characteristics of 803 patients.

	T categories
	T0	T1	T2	T3	T4
Number	1	81	98	416	207
Gender
Male	—	61	61	294	151
Female	1	20	37	122	56
Age (Y)
Median age	55	55	51	52	55
Range	—	28–77	26–77	18–80	25–84
Radiotherapy
IMRT	—	57	66	245	129
VMAT	1	24	32	171	78
Nasopharynx RT dose (Gy)	70.4	70.5 (67.2–73.6)	70.6 (69–72.6)	70.4 (69–72.6)	70.4 (66.9–74.2)
CT scanner
GE	—	48	50	211	110
Philips	1	33	48	205	97