MGMT and MLH1 methylation in Helicobacter pylori-infected children and adults

Table 4 Microsatellite instability status n (%)

Subjects	Microsatellite instability status
	MSI-L	MSI-H	MSI	MSS
Chronic gastritis
Child H. pylori negative	-	2 (7)	2 (7)	26 (93)
Child H. pylori positive	-	-	-	22 (100)
Adults H. pylori negative	6 (67)	3 (33)	9 (64)	5 (36)
Adults H. pylori positive	37 (73)	14 (27)	51 (61)	32 (39)
Gastric cancer	38 (60)	25 (40)	63 (68)a	29 (32)

MSI-H, the presence of more than one instability marker. MSI-L, the presence of a single instability marker. MSS, no instability markers were present.

^aP < 0.05 vs Helicobacter pylori (H. pylori)-positive chronic gastritis samples.