Impact of the Number of Dissected Lymph Nodes on Survival for Gastric Cancer after Distal Subtotal Gastrectomy

Table 3

Multiple stepwise regression analysis with the Cox proportional hazards model.

Characteristics	β	SE	Wald	P	RR	95% CI
Tumor diameter	−0.042	0.133	0.121	0.689	0.940	0.754–1.317
Pathology	−0.012	0.154	0.006	0.933	0.987	0.725–1.315
Depth of invasion			22.738	0.000
pT2 versus pT1	0.684	0.258	8.754	0.009	2.015	1.126–3.570
pT3 versus pT1	0.953	0.250	15.547	0.000	2.943	1.681–4.524
pT4a versus pT1	1.253	0.244	21.636	0.000	3.043	1.981–5.158
pN category t			119.502	0.000
pN1 versus pN0	0.513	0.156	12.244	0.000	2.022	1.401–2.873
pN2 versus pN0	1.364	0.186	48.598	0.000	4.302	3.423–5.966
pN3 versus pN0	2.196	0.237	89.746	0.000	10.379	6.587–18.846
Number of resected LNs	−0.425	0.041	106.996	0.000	0.625	0.588–0.736

β: Coefficient of regression.