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Associations between babA2 and oipA, cagA, and the s and m alleles of vacA
| babA2 | ||
| Positive | Negative | |
| oipA | ||
| On | 17 | 19 |
| Off | 3 | 21 |
| χ2=7.81; p<0.01 | ||
| cagA | ||
| Positive | 57 | 48 |
| Negative | 3 | 59 |
| χ2=42.39; p<0.001 | ||
| s vacA | ||
| s1 | 57 | 48 |
| s2 | 3 | 59 |
| χ2=42.39; p<0.001 | ||
| m vacA | ||
| m1 | 30 | 34 |
| m2 | 29 | 74 |
| χ2=5.99; p<0.05 | ||
The number of Helicobacter pylori isolates belonging to each category is reported. The data were analysed by means of the χ2 test.
