Table 4

Prevalence of virulence genotypes in subgroups of functional dyspepsia among H. pylori infected patients

Pure PDS
% (n)
Pure EPS
% (n)
Pure overlap
% (n)
p Value
CagA0.044
 Positive98.4% (60/61)89.1% (41/46)85.7% (42/49)
 Negative1.6% (1/61)10.9% (5/46)14.3% (7/49)
VacA0.749
 S195.1% (58/61)97.9% (46/47)95.8% (46/48)
 S24.9% (3/61)2.1% (1/47)4.2% (2/48)
VacA0.318
 M160.0% (36/60)45.5% (20/44)56.9% (29/51)
 M240.0% (24/60)54.5% (24/44)17.6% (9/51)
  • p Values calculated using χ2 test or Fisher's exact test as appropriate.

  • EPS, epigastric pain syndrome; PDS, postprandial distress syndrome.