Table IV.

Clinical characteristics of the 327 patients for the prognostic research.

	Low-risk patients, n=137			High-risk patients, n=190
Characteristic	Level Ib unirradiated	Level Ib irradiated	P-value	Level Ib unirradiated	Level Ib irradiated	P-value
Age
≤45	38	31	0.395	40	54	0.658
>45	32	36		37	59
Gender
Male	46	48	0.468	54	78	1.000
Female	24	19		23	35
Clinical stage
I	17	6	0.091	0	0	0.105
II	24	28		23	21
III	18	17		30	60
IV	11	16		24	32
T classification
T1	18	10	0.349	7	11	0.176
T2	24	26		36	36
T3	17	15		19	42
T4	11	16		15	24
N classification
N0	53	41	0.101	0	0	0.028
N1	15	19		43	51
N2	2	7		23	54
N3	0	0		11	8
Chemotherapy
No	47	44	0.859	19	39	0.199
Yes	23	23		58	74