Table 4.

Multivariate analysis of significant prognostic factors for survival in lymph node negative gastric carcinoma patients using Cox proportional hazard regression model

Variables	Risk ratio	95% CI	P value
Age(yr) (< 65 vs ≥65)	1.354	0.95-1.92	NS
Gender (male vs female)	0.923	0.66-1.28	NS
Location (upper vs distal)	0.731	0.49-1.09	NS
Tumor size (mm) (< 50 vs ≥50)	1.513	1.06-2.21	< 0.05
Histologic type (differentiated vs. undifferentiated)	0.749	0.55-1.02	NS
Serosal invasion (negative vs positive)	3.409	2.42-4.80	< 0.001
Extent of lymph node dissection (< D2 vs ≥ D2)	1.188	0.56-2.50	NS
Curability (curative vs non-curative)	3.84	2.11-7.00	< 0.001
Esophageal invasion (negative vs positive)	1.007	0.34-2.97	NS

CI, confidence interval; NS, not significant.