Longitudinal analysis of gas stove and wood fireplace use and health care utilisation at 18 month follow up
| Emergency department visits | Hospital admissions | |||
|---|---|---|---|---|
| Exposure | OR (95% CI)* | Multivariate† | OR (95% CI)* | Multivariate† |
| *Logistic regression analysis to evaluate impact of baseline exposure on outcome at 18 months, controlling for baseline severity of asthma. | ||||
| †Logistic regression analysis controlling for baseline severity of asthma score and additional covariates:age, sex, income, educational attainment. | ||||
| ‡During an average winter week. | ||||
| OR (95% CI) | OR (95% CI) | |||
| Personal gas stove use: | ||||
| Baseline use | ||||
| None | – | – | – | – |
| Lower use (1–6 times/week) | 1.2 (0.5 to 2.7) | 1.2 (0.5 to 2.7) | 1.6 (0.5 to 5.5) | 1.5 (0.4 to 5.0) |
| Higher use (≥7 times/week) | 1.1 (0.4 to 2.9) | 1.1 (0.4 to 3.1) | 0.4 (0.1 to 3.7) | 0.4 (0.05 to 3.8) |
| Change in use over time | ||||
| No use, either interview | – | – | – | – |
| Continued use | 1.0 (0.4 to 2.4) | 1.0 (0.4 to 2.4) | 0.9 (0.3 to 3.3) | 0.9 (0.2 to 3.4) |
| Increased use | 1.9 (0.7 to 5.2) | 1.8 (0.6 to 5.1) | 0.9 (0.2 to 5.5) | 1.1 (0.2 to 6.9) |
| Decreased use | 1.7 (0.5 to 5.1) | 1.8 (0.6 to 5.7) | 0.9 (0.1 to 8.6) | 1.1 (0.1 to 9.9) |
| Wood fireplace or stove use: | ||||
| Baseline use‡ | ||||
| None | – | – | – | – |
| Lower use (1–4 times/week) | 1.0 (0.3 to 2.8) | 1.0 (0.3 to 3.0) | 1.9 (0.4 to 8.9) | 2.5 (0.5 to 11) |
| Higher use (≥5 times/week) | 0.7 (0.2 to 2.1) | 0.7 (0.2 to 2.5) | 0.3 (0 to 3.0) | 0.4 (0 to 4.8) |
| Change in use over time | ||||
| No use, either interview | – | – | – | – |
| Continued use | 0.8 (0.2 to 2.4) | 0.9 (0.3 to 3.0) | 0.6 (0.1 to 5.5) | 1.1 (0.1 to 11.1) |
| Increased use | 0.6 (0.2 to 2.3) | 0.7 (0.2 to 2.5) | 0.5 (0 to 4.5) | 0.8 (0.1 to 7.8) |
| Decreased use | 0.8 (0.2 to 2.5) | 0.8 (0.2 to 2.6) | 0.7 (0.1 to 4.4) | 0.9 (0.1 to 5.9) |