Status of the Gastric Mucosa with Endoscopically Diagnosed Gastrointestinal Stromal Tumor

Table 4

Rate of H. pylori infection and type of gastric mucosal atrophy by age group.

Age group	40–49	50–59	60–69	70–79	80–89	≥90
H. pylori-positive (%)	0/3	5/12	11/21	7/9	—	0/1
	(0)	(41.7)	(52.4)	(77.8)	—	(0)
Atrophy (—)/C-type/O-type	3/0/0	7/3/2	10/9/2	2/5/2	—	1/0/0

C-type: closed-type atrophy, O-type: open-type atrophy.