Table 4.
The odds ratios (OR) and 95% confidence intervals (CIs) of asthma occurrence according to the level of greenness exposure in subjects from 6 to 17 years old.
| Greenness Exposure | Model 1 | Model 2 | ||
|---|---|---|---|---|
| OR (95% CI) | p-Value | OR (95% CI) | p-Value | |
| 0–20% | Reference | Reference | ||
| 21–40% | 1.17 (0.96–1.43) | 0.1226 | 1.17 (0.96–1.43) | 0.1314 |
| 41–60% | 1.25 (0.97–1.62) | 0.0840 | 1.24 (0.96–1.60) | 0.0946 |
| 61–80% | 1.36 (1.02–1.81) | 0.0344 | 1.36 (1.03–1.81) | 0.0332 |
| 81–100% | 1.17 (0.82–1.67) | 0.3963 | 1.15 (0.81–1.64) | 0.4315 |
| p for trend | 0.1309 | 0.1442 | ||
Model 1 was adjusted for urbanization level, frequency of healthcare provider visits, mean township family income, CO, and PM2.5. Model 2 was adjusted for urbanization level, frequency of healthcare provider visits, mean township family income, NO2, and PM2.5. OR and 95% CI values were estimated using a conditional logistic regression model. The p-trends were calculated using the continuous scale of the level of greenness exposure in the corresponding models.