Table 1.

Seroprevalence of H. pylori infection and CagA-specific IgG in the study cohort

Cohort (age in yr)No. of subjectsNo. of H. pylori-positive subjects (%)aNo. of CagA-positive subjects (% of H. pylori-positive subjects)
All2,3181,029 (44.4)446 (43.3)
0-20487 (14.6)5 (71.4)
21-3024154 (22.4)22 (40.7)
31-4018575 (40.6)29 (38.7)
41-50268122 (45.5)67 (54.9)
51-60329167 (50.8)72 (43.1)
61-70371167 (45.0)69 (41.3)
71-80497251 (50.5)100 (39.8)
81-90352175 (49.7)77 (44.0)
>912711 (40.7)5 (45.5)
<3028961 (21.1)27 (44.3)
>302,029968 (47.7)419 (43.3)
  • a Subjects were considered H. pylori positive based on the presence of H. pylori-specific IgG (≥30 EIU) and/or the presence of anti-CagA IgG.