Table 3:
Sensitivity analyses for associations between asthma control status and air quality and pollen severity indexa, b
| Scenarios | No. of subjects | No. of observations | PM2.5 | O3 | Pollen |
|---|---|---|---|---|---|
| Beta (95% CI) | Beta (95% CI) | Beta (95% CI) | |||
| ≥ 1 monitoring days | |||||
| 0≤ Distance ≤20km | 108 | 1806 | 0.32** (0.11,0.53) | −0.20* (−0.39, −0.02) | 0.42┼ (−0.02, 0.86) |
| 0≤ Distance ≤30km | 146 | 2471 | 0.31*** (0.13, 0.49) | −0.16┼ (−0.32, 0.01) | 0.50** (0.13, 0.86) |
| Distance ≥0km | 181 | 3016 | 0.22** (0.07, 0.38) | −0.16* (−0.31, −0.01) | 0.37* (0.05, 0.68) |
| ≥ 3 monitoring days | |||||
| 0≤ Distance ≤20km | 103 | 1541 | 0.37** (0.13, 0.61) | −0.21* (−0.41, −0.01) | 0.38 (−0.09, 0.84) |
| 0≤ Distance ≤30km | 141 | 2153 | 0.37*** (0.17, 0.56) | −0.16┼ (−0.34, 0.02) | 0.44* (0.06, 0.83) |
| Distance ≥0km | 175 | 2629 | 0.26** (0.08, 0.43) | −0.17* (−0.33, −0.01) | 0.35* (0.02, 0.68) |
| ≥ 5 monitoring days | |||||
| 0≤ Distance ≤20km | 90 | 1437 | 0.42** (0.16, 0.67) | −0.23* (−0.44, −0.02) | 0.35 (−0.13, 0.84) |
| 0≤ Distance ≤30km | 124 | 2013 | 0.40*** (0.19, 0.62) | −0.19* (−0.38, −0.01) | 0.45* (0.06, 0.85) |
| Distance ≥0km | 153 | 2429 | 0.31** (0.12, 0.49) | −0.23** (−0.40, −0.06) | 0.36* (0.01, 0.70) |
a
Sensitivity analyses were adjusted for the season and socio-demographic variables, including the child’s age, sex, race/ethnicity, and number of chronic conditions and the parent’s age, marital status, and educational background.
b
Higher scores indicate worse asthma control status.
┼
p<0.1;
*
p<0.05;
**
p<0.01;
***
p<0.001.