Table 3.

Multivariable model for risk factors associated with the LNM of pathological T1 esophageal squamous cell carcinoma.

Subgroup	B	OR (95%CI for OR)	P value
Smoke	0.78	2.16 (0.93–5.02)	.046
G. stage	0.79	2.20 (1.12–4.39)	.022
LVSI	1.73	5.66 (1.70–18.85)	.005
CEA	0.15	1.12 (0.98–1.28)	.038

B = regression coefficient, CEA = carcinoembryonic antigen, CI = confidence interval, G. stage = degree of tumor differentiation, LNM = lymph node metastasis, LVSI = vascular tumor thromboembolus, OR = odds ratio.