Summary of results for single pollutant analysis of consultations for LRD (excluding asthma). Percentage change in number of consultations for a 10–90th percentile change in each pollutant presented at its most significant single/cumulative lag
| Age group | Pollutant | Single day lag | % change in number of consultations (95% CI) | p value | Cumulative measure | % change in number of consultations (95% CI) | p value |
|---|---|---|---|---|---|---|---|
| All ages | NO2 | 1 | 1.3 (−0.4 to 3.0) | 0.1 | 0 to 2 | 1.2 (−0.7 to 3.1) | 0.2 |
| O3 | 0 | −3.9 (−6.1 to −1.6) | 0.001 | 0 and 1 | −3.3 (−6.1 to −0.5) | 0.02 | |
| SO2 | 2 | 1.8 (0.2 to 3.4) | 0.03 | 0 to 2 | 2.2 (0.4 to 4.1) | 0.02 | |
| BS | 2 | 1.3 (−0.3 to 2.8) | 0.1 | 0 to 2 | 0.7 (−1.2 to 2.5) | 0.5 | |
| CO | 2 | 2.0 (0.5 to 3.4) | 0.007 | 0 to 2 | 1.8 (0.1 to 3.6) | 0.04 | |
| PM10 | 2 | 2.1 (0.4 to 3.8) | 0.02 | 0 to 2 | 1.9 (0.1 to 3.8) | 0.04 | |
| 0–14 | NO2 | 2 | 4.8 (1.3 to 8.3) | 0.006 | 0 to 3 | 4.5 (0.4 to 8.7) | 0.03 |
| O3 | 0 | −6.1 (−10.0 to −2.1) | 0.003 | 0 and 1 | −7.6 (−12.4 to −2.6) | 0.00 3 | |
| SO2 | 2 | 4.5 (1.4 to 7.8) | 0.004 | 0 to 3 | 5.7 (1.7 to 9.7) | 0.00 4 | |
| BS | 2 | 3.7 (0.7 to 6.8) | 0.01 | 0 to 3 | 2.2 (−1.6 to 6.1) | 0.3 | |
| CO | 2 | 4.4 (1.7 to 7.1) | 0.001 | 0 to 3 | 3.0 (−1.0 to 7.2) | 0.1 | |
| PM10 | 1 | 2.5 (−0.7 to 5.8) | 0.1 | 0 to 3 | 3.6 (−0.2 to 7.5) | 0.06 | |
| 15–64 | NO2 | 2 | 1.1 (−1.1 to 3.4) | 0.3 | 0 to 2 | 0.8 (−1.8 to 3.5) | 0.6 |
| O3 | 3 | −1.9 (−4.5 to 0.8) | 0.2 | 0 to 3 | −2.3 (−5.9 to 1.5) | 0.2 | |
| SO2 | 1 | 1.5 (−0.7 to 3.7) | 0.2 | 0 to 3 | 1.6 (−0.9 to 4.1) | 0.2 | |
| BS | 1 | −0.8 (−2.8 to 1.2) | 0.4 | 0 to 3 | −1.2 (−3.6 to 1.3) | 0.3 | |
| CO | 2 | 1.1 (−0.7 to 3.0) | 0.2 | 0 and 1 | −0.7 (−2.9 to 1.5) | 0.5 | |
| PM10 | 2 | 2.2 (−0.0 to 4.5) | 0.05 | 0 to 2 | 2.7 (0.2 to 5.3) | 0.03 | |
| 65+ | NO2 | 0 | −1.7 (−4.3 to 1.1) | 0.2 | 0 and 1 | −1.0 (−4.2 to 2.3) | 0.5 |
| O3 | 1 | 3.6 (−0.5 to 7.9) | 0.08 | 0 and 1 | 1.5 (−3.0 to 6.3) | 0.5 | |
| SO2 | 0 | −2.2 (−4.9 to 0.6) | 0.1 | 0 and 1 | −1.4 (−4.4 to 1.7) | 0.4 | |
| BS | 2 | 1.5 (−1.3 to 4.5) | 0.3 | 0 to 2 | 0.7 (−2.6 to 4.0) | 0.7 | |
| CO | 3 | −2.6 (−4.8 to −0.3) | 0.03 | 0 to 3 | −1.6 (−5.1 to 2.0) | 0.4 | |
| PM10 | 2 | 3.7 (0.3 to 7.2) | 0.03 | 0 to 3 | 2.8 (−0.8 to 6.5) | 0.1 |
Single day lag 0 = pollutant measure on day of consultation, lag 1 = pollutant measure on one day prior to consultation, etc.
Cumulative measure (0,1) = average value of pollutant measure on lag 0 and lag 1, etc.
Summary of pollutant measures: (10th, 90th centile single lag, mean (0,1), mean (0,1,2), mean (0,1,2,3) days), daily measure and units of measurement:
NO2 (22,46; 23,46; 24,45; 25,44) 24 h average (ppb);
O3 (4,30; 5,30; 6,30; 6,29) 8 h moving average (ppb);
SO2 (13,31; 14,30; 14,29; 15,29) 24 h average (μg/m3);
BS (6,22; 6,21; 7,21; 7,20) 24 h average (μg/m3);
CO (0.5,1.3; 0.5,1.3; 0.5,1.2; 0.5,1.2) 24 h average (ppm);
PM10 (16,47; 17,45; 17,44; 18,44) 24 h average (μg/m3).
All p values have been rounded to one significant digit.