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Table 4 Prevalence of H. pylori virulence factors in Hanoi and Ho Chi Minh

From: Helicobacter pylori infection and gastroduodenal diseases in Vietnam: a cross-sectional, hospital-based study

  Hanoi (n = 53) Ho Chi Minh (n = 47) p (Hanoi vs. Ho Chi Minh)
cagA    N.S
   Positive 51 (96.2%) 44 (93.6%)  
   Negative 2 (3.8%) 3 (6.4%)  
cagE    N.S
   Positive 49 (92.5%) 39 (83.0%)  
   Negative 4 (7.5%) 3 (6.4%)  
vacA m    0.034
   m1 31 (58.%) 17 (36.2%)  
   m2 22 (41.5% 30 (63.8%)  
vacA s    N.S
   s1 53 (100%) 48 (100%)  
   s2 0 (0%) 0 (0%)  
vacA i    N.S
   i1 50 (94.3%) 44 (93.6%)  
   i2 3 (5.7%) 3 (6.4%)  
babA    N.S
   Positive 50 (94.3%) 42 (89.4%)  
   Negative 3 (5.7%) 5 (10.6%)  
oipA status    N.S
   On 53 (100%) 48 (100%)  
   Off 0 (0%) 0 (0%)  
iceA    N.S
   iceA1 26 (49.1%) 24 (51.1%)  
   iceA2 23 (43.4%) 21 (44.7%)  
   Both iceA1/2 2 (3.8%) 1 (2.1%)  
   None 2 (3.8%) 1 (2.1%)  
homB    N.S
   Positive 19 (35.8%) 20 (42.6%)  
   Negative 34 (64.2%) 27 (57.4%)  
Quadruple positivity    0.046
   Yes 29 (54.7%) 16 (34.0%)  
   No 24 (45.3%) 31 (66.0%)  
  1. N.S, not significant.