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Study group presenting or not presenting H. pylori infection.
| Infection with H. pylori | % | |
|---|---|---|
| absent | 1215 | 69.2 |
| present | 542 | 30.8 |
| Headache | ||
| absent | 1627 | 92.6 |
| present | 130 | 7.4 |
| Sex | ||
| female | 1210 | 68.9 |
| male | 547 | 31.1 |
| Area of living | ||
| urban | 643 | 36.6 |
| rural | 1114 | 63.4 |
