Estimated change in PEFR by lag: all schools together, according to site of air pollution monitor (community or local)
| Pollutant | Lag 0 | Lag 1 | Lag 2 | Mean (0–4) |
|---|---|---|---|---|
| Results expressed as estimate (95% CI). | ||||
| In addition to pollutant, the individual regression models included the following predictors: 24 hour average outside temperature; date. | ||||
| Mean (0–4) is five day average. | ||||
| NA, not available as SO42− was not locally measured. | ||||
| NO2 24 h ave. | ||||
| Community | 0.01 (−0.06 to 0.09) | 0.01 (−0.05 to 0.08) | 0.03 (−0.04 to 0.10) | 0.11 (−0.04 to 0.25) |
| Local | 0.02 (−0.05 to 0.09) | 0.03 (−0.04 to 0.10) | −0.03 (−0.10 to 0.04) | −0.01 (−0.15 to 0.13) |
| NO2 1 h max. | ||||
| Community | 0.03 (−0.01 to 0.08) | 0.00 (−0.04 to 0.04) | 0.01 (−0.04 to 0.06) | 0.13 (0.02 to 0.24) |
| Local | 0.02 (−0.02 to 0.05) | 0.02 (−0.01 to 0.06) | 0.00 (−0.04 to 0.04) | 0.04 (−0.05 to 0.13) |
| O3 1 h max. | ||||
| Community | 0.01 (−0.05 to 0.06) | 0.01 (−0.04 to 0.06) | −0.01 (−0.06 to 0.03) | −0.03 (−0.12 to 0.06) |
| Local | 0.01 (−0.05 to 0.07) | 0.01 (−0.05 to 0.06) | −0.01 (−0.06 to 0.05) | −0.01 (−0.11 to 0.08) |
| O3 8 h mma | ||||
| Community | 0.01 (−0.05 to 0.07) | 0.01 (−0.05 to 0.07) | 0.00 (−0.05 to 0.05) | −0.04 (−0.15 to 0.06) |
| Local | 0.03 (−0.04 to 0.09) | 0.00 (−0.06 to 0.06) | 0.02 (−0.04 to 0.08) | −0.01 (−0.11 to 0.09) |
| SO2 24 h ave. | ||||
| Community | 0.05 (−0.05 to 0.16) | −0.04 (−0.13 to 0.06) | −0.08 (−0.19 to 0.04) | −0.23 (−0.65 to 0.18) |
| Local | −0.01 (−0.10 to 0.07) | 0.02 (−0.05 to 0.10) | −0.09 (−0.18 to 0.01) | −0.09 (−0.25 to 0.07) |
| SO42− 24 h ave. | ||||
| Community | −0.30 (−0.84 to 0.23) | −0.23 (−0.80 to 0.34) | 0.18 (−0.27 to 0.63) | 0.15 (−0.76 to 1.05) |
| Local | NA | NA | NA | NA |
| PM10 24 h ave. | ||||
| Community | −0.04 (−0.11 to 0.03) | 0.03 (−0.04 to 0.05) | −0.01 (−0.07 to 0.05) | −0.10 (−0.25 to 0.05) |
| Local | −0.01 (−0.06 to 0.03) | 0.04 (0.01 to 0.08) | 0.01 (−0.04 to 0.05) | 0.04 (−0.05 to 0.13) |