Table 1. Characteristics of the three groups of patients.

Variate	CCRT	CCRT+AC	IMRT alone	P value
Age				0.639
≤45	47	25	22
>45	33	15	20
Sex				0.400
female	23	10	16
male	57	30	26
Pathology (WHO)				0.189
II type	7	8	7
III type	73	32	35
T stage				0.548
T1	14	4	6
T2	66	36	36
N stage				P<0.001
N0	6	1	18
N1	74	39	24
Clinical stage				P<0.001
T2N0M0	6	1	18
T1N1M0	14	4	6
T2N1M0	60	35	18