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Table 4 Distribution of Helicobacter pylori strains included in the study (n = 455), according to the geographical origin, gender and patient's age.

From: Allelic diversity and phylogeny of homB, a novel co-virulence marker of Helicobacter pylori

Origin

No. of strains

Gender, % male

Median age ± SD (years)

Western countries

Portugal

115

47.3

51.8 ± 15.4

France

35

82.9

47.7 ± 14.1

Sweden

27

58.8

66.6 ± 11.2

Germany

20

50.0

58.6 ± 11.9

USA

29

67.9

48.7 ± 12.0

Brazil

56

52.4

52.8 ± 16.4

Colombia

19

57.9

50.0 ± 12.7

East Asian countries

Japan

72

57.9

44.3 ± 12.7

South Korea

71

76.1

44.7 ± 9.9

African country

Burkina Faso

11

N.A.

N.A.

  1. No., number
  2. SD, standard deviation
  3. N.A. not available