Table 1

Patient characteristics

Endoscopic oesophageal findings	No	Age (mean (SD))	Reflux symptom		H pylori status		Corpus gastric atrophy
Endoscopic oesophageal findings	No	Age (mean (SD))	+	−	Positive	Negative	Yes	No
No erosive oesophagitis	212	47 (8)	47	165	159	53	113	99
Erosive oesophagitis
Grade A	78	43 (10)	59	19	37	41	16	62
Grade B	23	47 (7)	18	5	10	13	4	19
Grade C	6	47 (5)	5	1	2	4	0	6
Grade D	1	46	1	0	0	1	0	1
Total	108	45 (10)	83	25	49	59	20	88
Total	320	46 (9)	130	190	208	112	133	187