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Characteristics of study participants
| Characteristic | No. (%) | Mean age, years (SD) | Women, no. (%) |
|---|---|---|---|
| Total | 2,020 (100) | 55.9 (16.1) | 1,219 (60.6) |
| Esophagitis | 58 (2.9) | 54.4 (16.9) | 30 (51.7) |
| Gastritis | 1,558 (77.1) | 56.5 (16.2) | 583 (37.5) |
| Esophagitis and gastritis | 363 (18.0) | 53.5 (15.4) | 162 (44.8) |
| Normal | 41 (2.0) | 57.9 (14.2) | 18 (45.0) |
| P value | 0.01 | 0.01 |
