Cell proliferation of esophageal squamous epithelium in erosive and non-erosive reflux disease

Table 1 Demographic, endoscopic, histological and 24-h esophageal pH monitoring data of the studied population

	NERD	ERD
No. of subjects	21	13
Sex (M/F)	9/12	7/6
Mean age ± SD (yr) (range)	44.2 ± 14.9 (22-73)	54.4 ± 15.7 (29-78)
Endoscopy
Normal	21	0
A	0	0
B	0	7
C	0	6
D	0	0
Histology
Normal	21	12
Mild	0	1
Moderate	0	0
Severe	0	0
24-h pH monitoring
Mean % of acid exposure time ± SD	10.4 ± 1.3	10.7 ± 1.4
Mean number of acid reflux events ± SD	126 ± 20	128 ± 22

M: Male; F: Female; NERD: Non-erosive reflux disease; ERD: Erosive reflux disease.