Prognostic factors in stage IB gastric cancer

Table 1 Comparison of patient’s characteristics in the pT1N1M0 group and pT2N0M0 group

Characteristics	pT1N1M0 group(n = 45)	pT2N0M0 group(n = 58)	P value
Age (yr)			0.433
< 70	32	37
≥ 70	13	21
Gender			0.510
Male	30	35
Female	15	23
Performance status (ECOG)			0.208
0	45	56
1	0	2
Site of tumor			0.719
Upper third	11	16
Middle third	24	22
Lower third	10	20
Maximal tumor diameter (mm)			0.281
≤ 20	7	4
> 20, ≤ 40	22	27
> 40	16	27
Histological type			0.931
Differentiated	19	24
Undifferentiated	26	34
Lymphatic invasion			0.010
Negative	26	47
Positive	19	11
Vascular invasion			0.256
Negative	32	35
Positive	13	23

Table 2 Comparison of recurrence-free survival rate by patient’s characteristics

Characteristics	No. of patients	3-yr rate	5-yr rate	P value
Age (yr)				0.0637
< 70	69	97.0%	94.7%
≥ 70	34	89.7%	85.2%
Gender				0.1512
Female	38	100%	95.2%
Male	65	91.8%	89.8%
Tumor location				0.0565
L	29	91.7%	91.7%
M	47	97.7%	97.7%
U	27	88.8%	84.1%
Pathological tumor diameter (mm)				0.6106
≤ 20	11	90.9%	90.9%
> 20, ≤ 40	49	95.1%	91.8%
> 40	43	95.1%	91.8%
Histological type				0.4419
Differentiated	43	92.5%	92.5%
Undifferentiated	60	94.6%	91.0%
Number of lymph node metastases				0.9013
0	58	94.1%	94.1%
1	33	93.4%	89.1%
2	12	90.9%	90.9%
Lymphatic invasion				0.1645
Negative	73	95.4%	93.2%
Positive	30	89.3%	89.3%
Vascular invasion				0.7861
Negative	67	93.3%	93.3%
Positive	36	93.5%	89.0%

Table 3 Uni- and multivariate Cox proportional hazards analysis of clinicopathological factors

Characteristics	Number	Univariate			Multivariate
		OR	95%CI	P value	OR	95%CI	P value
Age (yr)				0.078
< 70	69	1.000
≥ 70	34	3.147	0.879-11.271
Gender				0.186
Female	38	1.000
Male	65	4.118	0.506-33.527
Tumor location				0.018			0.018
M or L	76	1.000			1.000
U	27	5.273	1.326-20.969		5.273	1.326-20.969
Pathological tumor diameter (mm)				0.874
≤ 40	60	1.000
> 40	43	1.123	0.268-4.704
Histological type				0.482
Differentiated	43	1.000
Undifferentiated	60	1.608	0.428-6.041
Number of lymph node metastases				0.902
0	58	1.000
1	33	1.293	0.287-5.830
2	12	1.563	0.169-14.495
Lymphatic invasion				0.177
Negative	73	1.000
Positive	30	2.369	0.674-8.512
Vascular invasion				0.786
Negative	67	1.000
Positive	36	1.192	0.334-4.253