Skip to main content

Table 1 Characteristics of H. pylori studies

From: The association between Acute Lymphoblastic Leukemia in children and Helicobacter pylori as the marker for sanitation

Country H. pylori prevalencea Min. ageb Max. agec No.d Methodf Population sourceg Level of urbanizationh Yeari Regionk Reference
Algeria 45 0 9 42 Serology Clinic Urban 1987 Africa Megraud et al. [23]
Brazil 36.7 3 5 60 Serology Clinic Urban 1992 Americas Oliveira et al. [24]
Colombia 61 2 5 373 UBT Community Rural 1992 Americas Goodman et al. [25]
Costa Rica 60 7 10 60 Serology Community Rural 1984-1988 Americas Sierra et al. [26]
USA 35 1 5 182 Serology Clinic Both 1998 Americas Elitsur et al. [27]
China 53 3 4 19 UBT Community Rural 1994 Western Pacific Ma et al. [28]
India 6 3 10 30 Serology Clinic Urban 1989 Southeast Asia Graham et al. [29]
Japan 12.5 1 4 56 Serology Clinic Urban 1994 Western Pacific Matsukura et al. [30]
Korea 6 1 3 52 Serology Clinic Both 1998j Western Pacific Malaty et al. [31]
Vietnam 13 0 9 61 Serology Clinic Urban 1987 Western Pacific Megraud et al. [23]
Belgium 6.4 1 5 n/ae Serology Clinic Both 1995 j Europe Blecker et al. [32]
Estonia 4.9 9 9 94 Serology Community Both 1993-1996 Europe Vorobja et al. [33]
Finland 6 3 3 131 Serology Community Both 1980 Europe Ashorn et al. [34]
France 4 0 9 113 Serology Clinic Urban 1987 Europe Megraud et al. [23]
Germany 8.3 3 5 36 Serology Clinic Urban 1984 Europe Hornemann et al. [35]
Iceland 9 0 9 13 Serology Clinic Both 1991-1992 Europe Bergenzaum et al. [36]
Italy 22 1 10 32 Serology Clinic Urban 1995 Europe Luzza et al. [37]
Netherlands 9 6 8 80 Serology Clinic Urban 1993 Europe Roosendaal et al. [38]
Poland 16.6 3 5 60 Serology Clinic Urban 1996 Europe Czkwianianc et al. [39]
Portugal 42.6 3 6 n/ae Serology Clinic Urban 1994 j Europe Quina et al. [40]
Russia 30 1 4 44 Serology Community Urban 1996 Europe Malaty et.al [41]
Spain 11 2 9 203 Serology Clinic Both 1991-1992 Europe Cilla et al. [42]
Sweden 7.7 1 4 661 Serology Clinic Urban 1984-1995 Europe Grandstorm et al. [43]
Switzerland 7 5 7 432 UBT Community Both 1998 Europe Boltshauser et al. [44]
Australia 25 2 4 20 Serology Clinic Urban 1991 Western Pacific Hardikar et al. [45]
Gambia 31 0 5 353 Serology Community Rural 1990 Africa Sullivan et al. [46]
Singapore 3 0 4 305 Serology Community Urban 1992 Western Pacific [17]
Thailand 74 1 4 27 Serology Community Urban 1990 Southeast Asia Perez-Perez et al. [18]
  1. a H. pylori prevalence (%).
  2. b Minimum age of children in the studies.
  3. c Maximum age of children in the studies.
  4. d Number of children in the age group.
  5. e Only the prevalence rate was available.
  6. f Method of detection was either by serological assay using IgG (serology) or urea breath test (UBT).
  7. g Population source was either clinic-based or community-based.
  8. h Studies were conducted in urban, rural or both areas.
  9. i The year the H. pylori study was done.
  10. j The year H. pylori study was published.
  11. k World Health Organization region a country is situated.