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

Table 2 Quantification of nitrotyrosine expression in Barrett’s esophagus, esophagitis and control patients.

Group	Mean±SE	Median (range)	Intensity1/Percent (%)2
Control	0.70±0.15	1.00 (0.00-1.00)	0	30
			1	70
Esophagitis	1.27±0.14	1.00 (1.00-2.00)	1	72.7
			2	27.3
Barrett's esophagus	2.41±0.14a	2.00 (2.00-3.00)	2	58.3
			3	41.7

^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.