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| Total | Positive | ||
|---|---|---|---|
| East-Asian-type cagA/vacA s1m1 | 222 | 5 | (2.3%) |
| East-Asian-type cagA/vacA s1m2 | 20 | 2 | (10.0%) |
| Western-type cagA/vacA s1m1 | 14 | 8 | (57.1%) |
| Western-type cagA/vacA s1m2 | 37 | 31 | (83.8%) |
| Western-type cagA/vacA s2m2 | 0 | 0 | (0.0%) |
| cag A-negative/vacA s2m2 | 43 | 0 | (0.0%) |
cagA type was determined based on the 3′ region of cagA sequence
