Efficacy of concurrent chemoradiotherapy alone for loco-regionally advanced nasopharyngeal carcinoma: long-term follow-up analysis

Table 2 Comparisons of survival outcomes in subgroups of LANPC patients

Characteristic	3-year survival (%)	5-year survival (%)	10-year survival (%)	Group 1		Group 2
Characteristic	3-year survival (%)	5-year survival (%)	10-year survival (%)	χ²	P value	χ²	P value
LR-FFS	87	77	72
Group 1	92	85	82
Group 2	87	74	69	9.08	0.003
Group 3	74	56	47	45.01	< 0.001	10.71	0.001
D-FFS	84	78	73
Group 1	92	87	83
Group 2	82	73	68	12.86	< 0.001
Group 3	64	55	50	47.91	< 0.001	9.99	0.002
FFS	82	74	70
Group 1	90	84	81
Group 2	79	69	66	10.90	0.001
Group 3	62	51	46	45.94	< 0.001	10.61	0.001
OS	91	81	76
Group 1	95	90	86
Group 2	90	78	71	13.49	< 0.001
Group 3	78	60	52	50.56	< 0.001	9.39	0.002

LR-FFS local–regional failure-free survival, D-FFS distant failure-free survival, FFS failure-free survival, OS overall survival
P < 0.05 was considered statistically significant.
Group1: T1-2N2 and T3N0-1, Group 2: T3N2 and T4N0-1, Group 3: T4N2 and T1-4N3

ISSN: 1748-717X