Odds ratios for H pylori seropositivity according to living conditions in childhood
| No of subjects | % H pylori positive | OR (95% CI) | p for trend4-150 | |
|---|---|---|---|---|
| No of people per room | ||||
| ⩽ 0.5 | 72 | 35 | 1.0 | |
| – 0.7 | 132 | 30 | 0.8 (0.4 to 1.5) | |
| – 0.8 | 141 | 43 | 1.4 (0.7 to 2.4) | |
| – 1.0 | 145 | 50 | 1.9 (1.1 to 3.4) | |
| – 1.5 | 137 | 53 | 2.0 (1.1 to 3.7) | |
| > 1.5 | 102 | 53 | 2.1 (1.1 to 3.8) | 0.001 |
| Bedroom and bed sharing | ||||
| Shared neither | 256 | 35 | 1.0 | |
| Shared bedroom | 133 | 41 | 1.3 (0.9 to 2.0) | |
| Shared bed | 426 | 53 | 2.1 (1.5 to 2.9) | 0.02 |
| Inside water tap | ||||
| Yes | 553 | 43 | 1.0 | |
| No | 184 | 47 | 1.1 (0.8 to 1.6) | 0.5 |
| Inside flush lavatory | ||||
| Yes | 191 | 41 | 1.0 | |
| No | 516 | 47 | 1.2 (0.9 to 1.7) | 0.2 |
| Mains drainage | ||||
| Yes | 496 | 43 | 1.0 | |
| No | 197 | 49 | 1.2 (0.8 to 1.7) | 0.3 |
| Hot water supply | ||||
| Yes | 86 | 44 | 1.0 | |
| No | 610 | 45 | 1.0 (0.6 to 1.6) | 1.0 |
| Separate bathroom | ||||
| Yes | 160 | 37 | 1.0 | |
| No | 536 | 47 | 1.5 (1.0 to 2.1) | 0.03 |
The living conditions variables are calculated for age 0-10. Number of people per room is the maximum number of people per room at any time during 0-10 years. Bedroom and bed sharing refers to sharing a bedroom or bed regularly at any time during 0-10 years. Fot the remaining variables: ‘Yes’ means the amenity was present throughout 0-10 years. Subjects were omitted if unable to recall the information.
↵4-150 By logistic regression, allowing for sex.
OR = odds ratio; CI = confidence interval.