Table 1 Frequency and risk of H. pylori seropositivity among persons residing in rural Tanzania (May to June, 1985)
From: H. pylori-infection and antibody immune response in a rural Tanzanian population
Characteristic | No. H. pylori positive/Total No. (%) | OR | 95% CI | P value |
|---|---|---|---|---|
Sex * | 0.87 | |||
Female | 402/436 (92%) | Ref. | ||
Male | 322/351 (92%) | 1.04 | 0.67–1.62 | |
Age group, years* | <0.001 | |||
0–4 | 138/181 (76%) | Ref. | ||
5–9 | 168/180 (93%) | 4.4 | 2.42–7.81 | |
10–17 | 148/152 (97%) | 11.5 | 4.22–31.4 | |
≥18 | 264/268 (99%) | 20.6 | 7.57–56.2 | |
Birth order† | <0.001 | |||
1 | 79/105 (75%) | Ref. | ||
2 | 82/101 (91%) | 3.3 | 1.7–6.8 | |
≥3 | 136/139 (97%) | 11.1 | 3.7–34 | |
Next-older sibling ± | 0.08 | |||
Seronegative | 23/29 (79%) | Ref. | ||
Seropositive | 189/208 (91) | 2.70 | 0.90–8.34 | |
Location of village | 0.25 | |||
Hill | 272/290 (94%) | Ref. | ||
Valley | 453/498 (91%) | 0.66 | 0.33–1.33 |