Association between Helicobacter pylori status and metachronous gastric cancer after endoscopic resection

Table 2 Baseline characteristics of patients according to performance of Helicobacter pylori status test n (%)

	H. pylori tested group	H. pylori non-tested group	P value
	(n = 257)	(n = 176)
Sex
Male	189 (73.5)	136 (77.3)	0.378
Female	68 (26.5)	40 (22.7)
Age, mean (SD)	66.61 (9.63)	67.60 (10.03)	0.303
Follow-up period (mo), mean (SD)	34.12 (25.19)	33.31 (18.11)	0.699
Endoscopic mucosal atrophy	83 (32.3)	12 (6.8)	< 0.001
Intestinal metaplasia	113 (44.0)	14 (8.0)	< 0.001
Location of primary cancer
Upper	25 (9.7)	12 (6.8)
Middle	85 (33.1)	37 (21.0)	0.006
Lower	147 (57.2)	127 (72.2)
Macroscopic type of primary cancer
Elevated	109 (42.4)	95 (54.0)
Flat	27 (10.5)	24 (13.6)	0.009
Depressed	121 (47.1)	57 (32.4)
Diameter of primary cancer (cm), mean (SD)	13.91 (6.93)	14.30 (5.74)	0.540
Histology of primary cancer
Differentiated	249 (96.9)	171 (97.2)
Undifferentiated	8 (3.1)	5 (2.8)	0.871
ESD criteria
Absolute	201 (78.2)	142 (80.7)	0.234
Expended	42 (16.3)	20 (11.4)
Beyond expanded	14 (5.4)	14 (8.0)
Depth of primary cancer
Mucosa	240 (93.4)	161 (91.5)	0.456
Submucosa	17 (6.6)	15 (8.5)
Metachronous cancer recurrence	11 (4.3)	4 (2.3)	0.262

ESD: Endoscopic submucosal dissection; H. pylori: Helicobacter pylori.