Table 2.

Risk factors for lymph node metastasis and distant metastasis in T1 colorectal cancer

Parameter	Odds ratio (95%CI)	P value
Lymph node metastasis
Age	1.015 (0.970, 1.062)	0.522
Gender	0.986 (0.329, 2.954)	0.980
Location	0.518 (0.138, 1.943)	0.330
Tumor size	0.859 (0.287, 2.574)	0.786
Histological grade	0.929 (0.748, 1.155)	0.509
CEA	0.445 (0.115, 1.805)	0.262
Distant metastasis
Age	1.050 (0.969, 1.138)	0.231
Gender	0.192 (0.022, 1.685)	0.137
Location	0.485 (0.095, 2.491)	0.386
Tumor size	0.563 (0.100, 3.163)	0.514
Histological grade	1.365 (0.957, 1.945)	0.086
LNM	2.154 (0.234, 19.850)	0.498
CEA (preoperation)	18.400 (3.106, 109.006)	0.001

CEA: Carcinoembryonic antibody; LNM: Lymph node metastasis.