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