Prognostic significance of MRI-based late-course tumor volume in locoregionally advanced nasopharyngeal carcinoma

Radiation Oncology

Table 1 Clinical Characteristics of the 145 patients with LA-NPC

Characteristics	No. of patients	Percentage (%)	LCV ≤ 6.8 cm³ (n = 108)	LCV > 6.8 cm³ (n = 37)	P value
Age (years)			52.9 ± 12.2	53.4 ± 11.4	0.591
< 55	72	49.7
≥ 55	73	50.3
Gender					0.519
Male	112	77.2	82	30
Female	33	22.8	26	7
T category					< 0.001
T1	13	9.0	13	0
T2	66	45.5	57	9
T3	48	33.1	29	19
T4	18	12.4	9	9
N category					0.397
N0	6	4.1	5	1
N1	17	11.7	10	7
N2	105	72.4	81	24
N3	17	11.7	12	5
TNM staging					0.011
III	112	77.2	89	23
IVA	33	22.8	19	14
Histological type					0.219
I	3	2.1	3	0
II	14	9.7	12	2
III	128	88.3	93	35
Vpre
≤ 16.3 cm³	108	74.5	57.4 ± 6202.0	118.5 ± 4383.0	< 0.001
> 16.3 cm³	37	25.5

V_pre tumor volume before treatment, LCV late-course volume; P value indicates the difference in the c-indexes

ISSN: 1748-717X