Table 4.

The correlation between risk groups and clinical features.

	Low risk		High risk
Variables	N	%	N	%	P
Age					P = 0.773
≤ 69	131	54.36	42	52.50
>69	110	45.64	38	47.50
Sex					P = 0.496
Male	116	48.13	35	43.75
Female	125	51.87	45	56.25
T stage					P = 0.595
T1	6	2.49	1	1.25
T2	47	19.50	11	13.75
T3	163	67.63	59	73.75
T4	25	10.37	9	11.25
N stage					P = 0.850
N0	143	59.34	50	62.50
N1	56	23.24	18	22.50
N2	42	17.43	12	15.00
TNM stage					P = 0.253
I	48	19.92	11	13.75
II	92	38.17	37	46.25
III	70	29.05	18	22.50
IV	31	12.86	14	17.50