Table 4.
Unadjusted and adjusted prevalence ratios for acute respiratory illness (ARI) in persons in counties affected by water service interruptions, Alabama, 2010 (N = 1283)
| Persons with ARI, N (%)* | Unadjusted*† | Adjusted*†‡ | |||
|---|---|---|---|---|---|
| PR | 95% CI | PR | 95% CI | ||
| Sampling area | |||||
| Area under boil water advisory | 122 (13·7) | 0·8 | 0·5–1·3 | 0·7 | 0·4–1·2 |
| Area not under boil water advisory | 72 (16·2) | 1·0 | 1·0 | ||
| Household water service interruption | |||||
| No loss of service or pressure | 40 (13·9) | 1·0 | 1·0 | ||
| Yes, low pressure and/or loss of service | 154 (15·3) | 1·1 | 0·6–2·0 | 0·9 | 0·5–1·7 |
| Loss of service and loss of pressure | 40 (13·9) | 1·4 | 0·8–2·6 | 1·1 | 0·6–2·2 |
| Loss of service only | 18 (9·3) | 0·6 | 0·2–1·6 | 0·5 | 0·2–1·4 |
| Loss of pressure only | 40 (13·9) | 1·0 | 0·5–2·0 | 1·0 | 0·5–1·9 |
| No loss of service or pressure | 96 (18·5) | 1·0 | 1·0 | ||
| Loss of service | |||||
| None | 80 (13·8) | 1·0 | 1·0 | ||
| <7 days | 50 (13·7) | 1·0 | 0·6–1·8 | 0·8 | 0·4–1·5 |
| ≥7 days | 64 (19·0) | 1·5 | 0·9–2·5 | 1·2 | 0·6–2·4 |
| Ptrend | 0·16 | 0·49 | |||
| Loss of pressure | |||||
| None | 59 (12·7) | 1·0 | 1·0 | ||
| 1–2 days | 53 (12·8) | 1·0 | 0·6–1·9 | 0·9 | 0·5–1·7 |
| 3–6 days | 47 (20·5) | 1·8 | 1·0–3·3 | 1·8 | 0·9–3·3 |
| ≥7 days | 35 (22·8) | 2·0 | 1·0–4·2 | 1·9 | 0·8–4·4 |
| Ptrend | 0·02 | 0·06 | |||
| Tap water access and use | |||||
| Unaffected household | 40 (13·9) | 1·0 | 1·0 | ||
| Affected household, non-potable use of tap water only | 16 (12·5) | 0·9 | 0·3–2·4 | 1·0 | 0·3–2·9 |
| Affected household, used boiled tap water for potable purposes§ | 10 (12·5) | 0·9 | 0·3–2·3 | 0·6 | 0·2–1·8 |
| Affected household, use unboiled tap water for potable purposes§ | 50 (14·8) | 1·1 | 0·6–2·1 | 0·9 | 0·5–1·8 |
| Did not report obtaining tap water | 78 (17·2) | 1·3 | 0·7–2·4 | 1·0 | 0·5–1·9 |
| Burst pipes | |||||
| No | 121 (13·1) | 1·0 | 1·0 | ||
| Yes | 73 (19·7) | 1·6 | 1·0–2·6 | 1·5 | 0·9–2·6 |
*
Estimates are weighted by inverse of sampling probability, adjusted for non-response.
†
Prevalence ratios (PR) and 95% confidence intervals (CI) estimated from weighted logistic regression models.
‡
All results shown are from separate models, each adjusted for age, race, employment, dwelling type, county of residence, and chronic health problems (respiratory or diabetes).
§
Potable purposes defined as drinking, cooking, brushing teeth, or preparing infant formula; regardless of treatment.