Table 2.
Distribution of study variables (daily values)
| Madrid |
Barcelona |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) | P5* | P25 | P50 | P75 | P95 | Mean (SD) | P5 | P25 | P50 | P75 | P95 | |
| Myocardial infarction, n | 13.5 (4.5) | 7 | 10 | 13 | 16 | 21 | 9.7 (3.4) | 4 | 7 | 9 | 12 | 15 |
| Cerebrovascular disease, n | 11.5 (3.8) | 6 | 9 | 11 | 14 | 18 | 8.9 (3.1) | 4 | 7 | 9 | 11 | 14 |
| COPD†, n | 11.3 (5.8) | 4 | 7 | 10 | 14 | 22 | 10.9 (5.7) | 4 | 7 | 10 | 10 | 22 |
| Asthma, n | 3.3 (2.3) | 0 | 1 | 3 | 5 | 7 | 0.8 (1.0) | 0 | 0 | 1 | 1 | 3 |
| Flu, n | 366 (622) | 7 | 27 | 106 | 343 | 1650 | 138 (248) | 9 | 21 | 55 | 141 | 541 |
| Acute respiratory infections, n | 5.2 (4.8) | 0 | 2 | 4 | 7 | 16 | 8.3 (5.5) | 2 | 5 | 7 | 11 | 18 |
| Temperature, °C | 20.4 (9) | 7.8 | 12.4 | 18.3 | 28 | 34.2 | 19.8 (7.6) | 8.4 | 13.4 | 19.5 | 26.1 | 32 |
| PM10, 24 h µg m3 | 36.9 (18.7) | 13.6 | 22 | 34.1 | 47.3 | 72.1 | 40.5 (15.8) | 19 | 29.6 | 38.5 | 49.2 | 68.5 |
| SO2, 24 h µg m3 | 12.6 (6.2) | 6.8 | 8.3 | 10.2 | 15.1 | 26.2 | 3.8 (3.5) | 1 | 1.1 | 2.4 | 5 | 10.9 |
| NO2, 24 h µg m3 | 60.7 (18.6) | 34.1 | 47 | 58.5 | 71.9 | 96.1 | 73.4 (23.4) | 39 | 55.4 | 71.9 | 89.1 | 114.5 |
| O3, 8 h µg m3 | 52.9 (27.1) | 11.5 | 31.1 | 52.7 | 72.2 | 98.2 | 43.5 (26.3) | 8 | 23 | 39 | 60 | 94 |
| Poaceae, grains/m3 | 4.3 (16.4) | 0 | 0 | 1 | 3 | 18 | 3 (7.5) | 0 | 0 | 0.7 | 2.1 | 16.1 |
| Plantago, grains/m3 | 0.8 (2.8) | 0 | 0 | 0 | 0 | 4.9 | 0.9 (1.9) | 0 | 0 | 0 | 0.7 | 4.9 |
| Olea, grains/m3 | 2.9 (21.1) | 0 | 0 | 0 | 0 | 10 | 3.3 (13.5) | 0 | 0 | 0 | 0.7 | 19.5 |
| Urticaceae, grains/m3 | 0.8 (2.1) | 0 | 0 | 0 | 1 | 4 | 5.1 (7.9) | 0 | 0.7 | 2.1 | 5.6 | 21.7 |
Madrid and Barcelona (Spain), 2003–2006 period.
*Percentile.
†Chronic obstructive pulmonary disease.