Table 3 Distribution of air pollutant concentrations in the study
| Â | Short-term exposure | Long-term exposure | ||||||
|---|---|---|---|---|---|---|---|---|
Lag 0 | Lag 0-1 | Lag 0-2 | Lag 0-3 | Lag 0-4 | Lag 0-5 | Lag 0-6 | Â | |
PM2.5 | ||||||||
 Mean (SD) | 42.4 (33.6) | 42.3 (31.1) | 42.3 (29.2) | 42.3 (27.8) | 42.2 (26.7) | 42.2 (25.8) | 42.2 (25.2) | 45.3 (13.7) |
 Median (IQR) | 33.0 (21.0, 52.0) | 34.0 (22.5, 52.0) | 34.7 (23.5, 52.0) | 35.0 (24.3, 51.7) | 35.4 (24.8, 51.6) | 35.7 (25.3, 51.5) | 36.0 (25.7, 51.3) | 43.1 (36.3, 53.3) |
 Min | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.6 |
 Max | 771.0 | 613.0 | 463.0 | 370.0 | 327.8 | 302.0 | 280.0 | 115.3 |
PM10 | ||||||||
 Mean (SD) | 73.2 (53.0) | 73.2 (48.8) | 73.2 (46.0) | 73.1 (44.0) | 73.0 (42.5) | 73.0 (41.3) | 73.0 (40.4) | 77.5 (25.9) |
 Median (IQR) | 60.0 (40.0, 91.0) | 61 (41.5, 90.5) | 61.3 (42.7, 90.3) | 62.0 (43.5, 90.0) | 62.6 (44.2, 89.6) | 63.0 (44.7, 89.8) | 63.5 (45.1, 89.6) | 73.3 (57.5, 88.7) |
 Min | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 25.1 |
 Max | 1908.0 | 1132.5 | 792.3 | 676.5 | 819.4 | 710.8 | 637.9 | 193.0 |
NO2 | ||||||||
 Mean (SD) | 38.4 (18.4) | 38.4 (17.2) | 38.4 (16.4) | 38.4 (15.9) | 38.3 (15.4) | 38.3 (15.1) | 38.3 (14.8) | 39.8 (9.0) |
 Median (IQR) | 35.0 (25.0, 49.0) | 35.5 (26.0, 48.0) | 36.0 (26.7, 47.7) | 36.0 (27.0, 47.8) | 36.2 (27.2, 47.7) | 36.4 (27.3, 47.7) | 36.4 (27.5, 47.6) | 41.8 (34.8, 45.1) |
 Min | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.6 |
 Max | 181.0 | 161.0 | 158.3 | 147.0 | 141.6 | 136.2 | 130.1 | 63.0 |
O3 | ||||||||
 Mean (SD) | 60.3 (32.0) | 60.2(30.4) | 60.2(29.4) | 60.2(28.7) | 60.2(28.2) | 60.3 (27.7) | 60.3(27.4) | 61.0 (9.1) |
 Median (IQR) | 56.2(36.1, 80.4) | 56.5(36.9, 79.5) | 56.8 (37.5,79.3) | 56.9 (38.0, 79.2) | 57.3(38.3, 78.9) | 57.4 (38.6,78.9) | 57.6 (38.8, 78.7) | 60.1(54.6, 67.7) |
 Min | 1 | 1.9 | 2.5 | 2.8 | 2.8 | 2.8 | 3.1 | 33.2 |
 Max | 233.6 | 232.0 | 224.3 | 214.2 | 210.5 | 200.6 | 193.6 | 107.0 |
SO2 | ||||||||
 Mean (SD) | 11.2 (9.2) | 11.2 (8.7) | 11.2 (8.5) | 11.2 (8.3) | 11.2 (8.2) | 11.2 (8.2) | 11.2 (8.1) | 13.0 (7.7) |
 Median (IQR) | 9.0 (6.0, 13.0) | 35.5 (26.0, 48.0) | 9.0 (6.3, 13.0) | 9.0 (6.5, 13.0) | 9.0 (6.4, 13.0) | 9.0 (6.5, 13.0) | 9.0 (6.6, 13.0) | 11.4 (8.0, 15.1) |
 Min | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.6 |
 Max | 342.0 | 161.0 | 225.7 | 215.0 | 207.8 | 202.8 | 192.1 | 115.4 |
CO | ||||||||
 Mean (SD) | 0.8 (0.4) | 0.8 (0.4) | 0.8 (0.3) | 0.8 (0.3) | 0.8 (0.3) | 0.8 (0.3) | 0.8 (0.3) | 0.9 (0.2) |
 Median (IQR) | 0.8 (0.6, 1.0) | 0.8 (0.6, 1.0) | 0.8 (0.6, 1.0) | 0.8 (0.6, 1.0) | 0.8 (0.6, 1.0) | 0.8 (0.6, 1.0) | 0.8 (0.6, 1.0) | 0.8 (0.7, 1.0) |
 Min | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 |
 Max | 6.4 | 5.6 | 5.7 | 5.4 | 4.8 | 4.7 | 4.3 | 2.4 |