Expression of nitric oxide synthase in human gastric carcinoma and its relation to p53, PCNA

Table 2 Relationship between the expressions of iNOS and p53, PCNA in gastric cancer.

	Cases n	iNOS expression		Positive rate(%)
		Positive	Negative
P53
Positive	72	59	13	81.9a
Negative	13	5	7	38.5
PCNA
Positive	69	56	13	81.2c
Negative	16	6	10	37.5

^aP<0.05, A comparison of iNOS expression between p53-positive and p53-negative groups; ^cP<0.05, A comparison of iNOS expression between PCNA-positive and PCNA-negative groups.