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| Variables | Patients, No. (%) |
|---|---|
| Endoscopic findings | |
| Group 1 (normal) | 21 (12.4) |
| Group 2 (abnormal nonulcerative) | 62 (36.4) |
| Group 3 (ulcerative) | 29 (17.1) |
| Group 4 (combination of groups 2 and 3) | 58 (34.1) |
