Table 3.

Comparison of clinopathologic variables among different risk groups

Variable	Group 3	Group2	Group1	p-value
Age (yr)				0.341
< 60	88	119	95
≥ 60	91	101	72
Gender				0.228
Male	124	154	204
Female	55	66	63
Primary T stage				0.661
T1	1	3	1
T2	2	5	2
T3	149	177	141
T4	18	30	15
NA	9	5	8
Primary N stage				0.368
N0	50	55	46
N1	60	84	53
N2	52	73	68
NA	17	8	0
Tumor grade				0.215
Well differentiated	17	20	17
Moderately differentiated	134	169	119
Poorly differentiated	19	16	19
Mucinous	2	0	0
Signet ring cell	1	7	6
NA	6	8	6
No. of metastases				< 0.001
1	3	40	109
> 1	176	180	58
Size of largest metastasis (cm)				0.012
≤ 5	134	183	145
> 5	45	37	22
Distribution of liver metastasis				< 0.001
Single	2	75	167
Both	177	145	0
CEA (ng/mL)				< 0.001
≤ 200	88	214	167
> 200	91	6	0
Disease-free interval (mo)				< 0.001
≥ 12	52	151	167
< 12	127	69	0
Fong's score				< 0.001
0-2	34	166	159
0 (low)	0	0	28
1	2	41	85
2	32	125	46
3-5	145	54	8
3 (high)	89	50	8
4	45	4	0
5	11	0	0

Chi-square test was used. NA, not available; CEA, carcinoembryonic antigen.