Table 1.
Regression coefficients and confidence intervals (CI) at 95% indicating the change of indoor T-PM2.5, NO2, and BC per NDVI increase at 270 and 1230 m of the school boundaries and road proximity.
| Model | NDVI 270 m | NDVI 1230 m | Road distance | |||
|---|---|---|---|---|---|---|
| Coefficients (95% CI) | p | Coefficients (95% CI) | p | Coefficients (95% CI) | p | |
| T-PM2.5 | ||||||
| Unadjusted | −0.068 (−0.124, −0.013) | <0.01 | −0.101 (−0.156, −0.046) | <0.01 | −5.48e-05 (−1.24e-04, −1.46e-05) | 0.12 |
| Adjusteda | −0.109 (−0.149, −0.068) | <0.01 | −0.136 (−0.174, −0.098) | <0.01 | −1.00e-04 (−1.48e-04, −5.39e-05) | <0.01 |
| NO2 | ||||||
| Unadjusted | −0.139 (−0.185, −0.092) | <0.01 | −0.122 (−0.169, −0.075) | <0.01 | −1.21e-04 (−1.61e-04, −8.10e-05) | <0.01 |
| Adjusteda | −0.550 (−0.843, −0.262) | <0.01 | −0.361 (−0.656, −0.067) | 0.016 | −6.69e-05 (−1.03e-04, −3.07e-05) | <0.01 |
| BC | ||||||
| Unadjusted | −0.060 (−0.115, −0.005) | 0.032 | −0.080 (−0.136, −0.026) | 0.004 | −1.20e-05 (−8.01e-05, −5.64e-05) | 0.18 |
| Adjusteda | −0.069 (0.119, −0.019) | 0.048 | −0.103 (−0.147, −0.058) | <0.01 | −8.62e-05 (−1.35e-04, −3.68e-05) | <0.01 |
aAdjusted model for regional pollution levels, wind speed, temperature, seasonality, number of windows, window orientation, and school ventilation.