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Characteristics of H pylori-positive Costa Rican patients
| Group A | Group B | P-value | |
| Number of patients | 101 | 90 | |
| Gender (male/female) | 49/52 | 33/57 | 0.81 |
| Mean age (yr, ± SD) | 50.4 ± 11.5 | 50.9 ± 13.6 | 0.99 |
| AG-positive (%) | 36 (35.6) | 24 (26.7) | 0.12 |
| IM-positive (%) | 17 (16.3) | 6 (6.7) | 0.02 |
