Table 1 Seroprevalence of H pylori antibodies (IgG) in O-87, O-97 and BD-97 groups.

15–24

31

21

9

12(38.7)

3(14.2)

1(11.1)

25–34

39

33

30

20(51.3)

12(36.4)

11(36.6)

35–44

31

42

42

21(67.7)

21(50.0)

22(52.4)

45–54

32

43

27

25(78.1)†

23(53.5)†

16(59.2)

55–64

37

43

12

24(64.8)

29(67.4)

8(66.6)

> 65

30

19

–

17(56.7)

11(57.9)

–

Total

200

201

120

119(59.5)‡

99(49.2)‡

58(48.3)