Table 2.

H. pylori prevalence by different characteristics among control subjects

H. pylori +/total (% positive)
Age (years in quintiles)
    <4372/130 (55.4)
    43-5690/123 (73.2)
    57-6798/126 (77.8)
    68-7376/99 (76.8)
    >7394/125 (75.2)
P value trend0.001
Number of residencies during lifetime
    115/29 (51.7)
    237/66 (56.1)
    3-5171/243 (70.4)
    >5207/265 (78.1)
P value trend<0.001
Sharing bed with siblings during childhood
    Yes186/246 (75.6)
    No244/357 (68.3)
P value0.053
Taking more medicines than siblings during childhood
    Yes31/54 (57.4)
    No394/543 (72.6)
P value0.019
Taking more antibiotics than siblings during childhood
    Yes25/45 (55.6)
    No400/552 (72.5)
P value0.016
Total430/603 (71.3)