Free radicals and antioxidant systems in reflux esophagitis and Barrett’s esophagus

Table 3 Quantification of Cu,ZnSOD expression in Barrett’s esophagus, esophagitis and control patients.

Group	Mean±SE	Median (range)	Intensity1/Percent (%)2
Control	1.30±0.15	1.00 (1.00-2.00)	1	70
			2	30
Esophagitis	2.00±0.27	2.00 (1.00-3.00)	1	36.4
			2	27.3
			3	36.4
Barrett's esophagus	2.5± 0.15a	2.50 (2.00-3.00)	2	50
			3	50

^aP<0.05 vs control. (n = 10-12 cases per group).

¹The intensity of immunohistochemistry was graded blinded according to the following scale: 0 : absent, 1: weak, 2: moderate and 3: intense.

²Percentage of samples according to degree of staining.