Table I.

Expression of ^γH2AX in patients with various histological observations.

				Overall score of γH2AX expression
Group	n	Mean age (SD), years	Gender, M/F	−, n	+, n	++, n	+++, n	%a	P-value
1 CG	56	53.6 (10.7)	30/26	29	27	0	0	48.2
2 IM	53	54.3 (9.6)	29/24	14	26	12	1	73.5	<0.001b
3 Dys	47	55.1 (10.3)	26/21	2	9	27	9	95.7	<0.001b,c
4 GC	146	56.8 (14.1)	96/50	15	57	50	24	89.7	<0.001b; 0.011d

^aPercentage of immunostaining.

^bvs. CG group;

^cvs. IM group;

^dvs. Dys group.

γH2AX, phosphorylated H2AX at Ser 139; M, male; F, female; CG, chronic gastritis; IM, intestinal metaplasia; Dys, dysplasia; GC, gastric cancer.