Helicobacter pylori vacA s1a and s1b alleles from clinical isolates from different regions of Chile show a distinct geographic distribution

Figure 3 Analysis of gastropathies outcome frequencies respect to VacA. genotype, gender and patient age; A: Relationship between pathologies and alleles. Minitab Release 12 PA.USA and χ2 test for categorical variables was used (P<0.05). P <0.05 was considered significant. The s2m2 allele was excluded of the statistics test due a low frequency (3%); B: Relationship between gastropathies and gender. F: female, M: male. A total of 43 females and 32 males were studied (P >0.5), four patients carrying strains with s2 m2 allele were excluded from this study; C: Relationship between gastropathies and patient age (P>0.5).