Table 2.

The 5-year OS, LC, and DMFS rates for all patients for each patient characteristic

Characteristic		5-year OS rate (%)		5-year LC rate		5-year DMFS rate
	No. (%)		p value		p value		p value
Age (years)
≥ 70 years	30 (55)	36	0.03	57	0.45	51	0.21
< 70 years	25 (45)	60		78		44
Gender
Male	46 (84)	52	0.49	72	0.19	46	0.53
Female	9 (16)	42		42		50
ECOG PS
0	42 (76)	40	< 0.01	67	0.9	51	< 0.01
1	11 (20)	20		68		41
≥ 2	2 (4)	–		100		–
T factor
3	5 (9)	60	0.83	80	0.5	80	0.83
4a	26 (47)	45		57		44
4b	24 (44)	56		76		43
N factor
Negative	38 (69)	51	0.85	67	0.98	55	0.39
Positive	17 (31)	47		68		31
Direction of tumor invasion medial site
Yes	53 (96)	48	0.4	65	0.38	47	0.67
No	2 (4)	50		100		50
Lateral site
Yes	45 (82)	51	0.99	65	0.75	49	0.43
No	10 (18)	50		78		40
Cranial site
Yes	52 (95)	50	0.28	69	0.52	49	0.85
No	3 (5)	50		50		0
Caudal site
Yes	31 (56)	35	0.01	56	0.31	39	0.32
No	14 (44)	69		77		56
Anterior site
Yes	48 (87)	46	0.11	66	0.38	45	0.86
No	7 (13)	83				57
Posterior site (pterygoid plates)
Yes	34 (62)	36	0.01	62	0.41	37	0.29
No	21 (38)	71		73		60
Nasopharynx
Yes	5 (9)	60	0.62	65	0.28	47	0.54
No	50 (91)	50		100		40
Posterior wall+
Yes	50 (91)	55	1	65	0.93	45	0.9
No	5 (9)	60		80		60