Analysis of ABC (D) stratification for screening patients with gastric cancer

Table 1 Characteristics of the patients with gastric cancer in this study

Characteristics		All patients	A	B	C	D
No. of patients		95	10	27	54	4
Age (yr)	Mean (range)	67.9 ± 8.9 (38-83)	69.2 ± 10.0 (48-79)	65.5 ± 9.0 (43-77)	68.4 ± 7.6 (38-83)	70.3 ± 6.9 (63-78)
	Median	69	70.5	67	69.5	70
Sex	Male/female	72/23	5/5	19/8	45/9	3/1
Location	U/M/L	19/42/34	2/6/2	2/14/11	15/22/17	0/0/4
Macroscopic type	Elevated/flat/depressed	51/4/40	5/0/5	12/0/15	31/3/20	3/1/0
Differentiation	Well diff/poorly diff	76/19	8/2	18/9	47/7	3/1

U: Upper thirds of the stomach; M: Middle; L: Lower; Well diff: Well or moderately differentiated adenocarcinoma; Poorly diff: Poorly differentiated adenocarcinoma or signet ring cell carcinoma.