Table 1.
Prevalence and risk factors – active Helicobacter pylori infection in an American Indian Population, 2005–2006
| Population characteristics (N = 166) | Distribution | |||
|---|---|---|---|---|
| Unweighted | Weighted | |||
| Mean | (range) | Mean | (95% CI) | |
| Continuous variables (n =missing) | ||||
| Risk factors | ||||
| Age, years (n = 1) | 36·3 | (5–88) | 31·4 | (27·5–35·3) |
| Household size (n = 0) | 3·8 | (1–11) | 4·6 | (4·0–5·1) |
| Number of rooms in house (n = 1) | 5·4 | (1–10) | 5·6 | (5·3–5·8) |
| Paternal education level, by grade (n = 31) | 2·7 | (0–6) | 2·8 | (2·6–3·0) |
| Categorical variables (n =missing) | No. | (%) | Prevalence | (95% CI) |
| Main outcome measure | ||||
| Positive urea breath test (n = 0) | ||||
| No | 79 | (47·6) | 45·0 | (35·0–55·1) |
| Yes | 87 | (52·4) | 55·0 | (44·9–65·0) |
| Risk factors | ||||
| History of H. pylori infection (n = 2) | ||||
| No | 147 | (88·6) | 92·0 | (86·9–97·1) |
| Yes | 17 | (10·2) | 8·0 | (2·9–13·1) |
| Sex (n = 0) | ||||
| Male | 81 | (48·8) | 52·0 | (42·0–62·0) |
| Female | 85 | (51·2) | 48·0 | (38·0–58·0) |
| Current smoker (n = 1) | ||||
| No | 107 | (64·4) | 61·9 | (52·4–71·5) |
| Yes | 58 | (34·9) | 38·0 | (28·5–47·6) |
| Living in most populated area now (n = 1) | ||||
| No | 66 | (39·8) | 45·2 | (35·2–55·3) |
| Yes | 99 | (59·6) | 54·8 | (44·7–64·8) |
| Living in most populated area, age 10 years to now (n = 1) | ||||
| No | 60 | (36·1) | 41·7 | (31·7–51·7) |
| Yes | 105 | (63·2) | 58·3 | (48·3–68·3) |
| Living in most populated area, birth to age 10 years (n = 0) | ||||
| No | 104 | (62·6) | 64·0 | (54·3–73·7) |
| Yes | 61 | (36·7) | 36·0 | (26·3–45·7) |
| Public water supply as home water source (n = 0) | ||||
| No | 86 | (51·8) | 56·3 | (46·4–66·3) |
| Yes | 79 | (47·6) | 43·6 | (33·7–53·6) |
| Public water supply as primary drinking water (n = 0) | ||||
| No | 150 | (90·4) | 91·2 | (85·9–96·4) |
| Yes | 16 | (9·6) | 8·8 | (3·6–14·1) |
CI, Confidence interval.