Table 1.

Characteristics of Helicobacter pylori testing among 35 patients with H. pylori positive gastric cancer and 56 patients with H. pylori negative gastric cancer. Additional comparison included 26 patients with suspected H. pylori gastric cancer (i.e., atrophic gastritis or gastric intestinal metaplasia on gastric biopsy in the setting of negative H. pylori testing).

	H. pylori Positive Gastric Cancer (n=35)	H. pylori Negative Gastric Cancer (n=56)	p-value	H. pylori Positive Gastric Cancer (including suspected) (n=61)	H. pylori Negative Gastric Cancer (excluding suspected) (n=30)	p-value
Histopathology of non-cancer gastric biopsy without special stain	14 (40.0)	11 (19.6)	0.034	20 (32.8)	5 (16.7)	0.136
Histopathology of non-cancer gastric biopsy with special stain	14 (40.0)	24 (42.9)	0.788	31 (50.8)	7 (23.3)	0.014
H. pylori IgG serology	20 (57.1)	14 (25.0)	0.002	26 (42.6)	8 (26.7)	0.139
H. pylori stool antigen	0 (0.0)	1 (1.8)	---	0 (0.0)	1 (3.3)	0.330
1 test for H. pylori (meaning gastric cancer biopsy only)	1 (2.9)	16 (28.6)	0.002	3 (4.9)	14 (46.7)	<0.001
≥2 tests for H. pylori	34 (97.1)	40 (71.4)	0.181	58 (95.1)	16 (53.3)	0.425
≥3 tests for H. pylori	14 (40.0)	9 (16.1)	0.624	19 (31.1)	4 (13.3)	0.765