Table III.

Multivariate analysis of risk factors for lymph node metastasis in patients with early gastric cancer.

Variables	Hazard ratio	95% Confidence interval	P-value
Age (> 65 years)	1.524	0.550–4.225	0.418
Females	1.520	0.540–4.277	0.428
Tumor location (lower)	1.366	0.504–3.703	1.366
Tumor size (>20 mm)	2.314	0.742–7.216	2.314
Macroscopic type (Depressed or mixed)	2.108	0.566–7.857	0.266
Depth of invasion (Submucosal)	1.163	0.062–21.939	0.920
Lymphovascular invasion (Positive)	8.595	1.694–43.595	0.009
Histology (Undifferentiated)	2.965	1.037–8.471	0.043
SDF-1α expression (Positive)	2.108	1.316–10.135	0.013