Apoptosis, proliferation and p53 gene expression of H. pylori associated gastric epithelial lesions

Table 2 Effect of H. pylori infection on PI in gastric epit helium (%, mean ± SD)

Group	H. pylori positive		H. pylori negative
	n	PI	n	PI
Normal	-	-	20	9.78 ± 3.65
Metaplasia	15	19.11 ± 6.79e	15	12.25 ± 5.63d
Dysplasia	15	33.89 ± 11.65eb	15	22.09 ± 8.18d
Carcinoma	10	48.27 ± 15.67ea	10	34.70 ± 12.74c

^eP < 0.01, vs normal (H. pylori negative);

^aP < 0.05,

^bP < 0.01, vs upper adjacent group;

^cP < 0.05,

^dP < 0.01, vs positive group.