SO2 and hospital admissions daily averages (SD) by diagnosis, age group, and city; APHEA 2 study
| Asthma | |||||
|---|---|---|---|---|---|
| City (years) | SO2 (μg/m3) | <15 y | 14–64 y | COPD + asthma (>64 y) | All respiratory (>64 y) |
| Birmingham (1992–94) | 24.3 (12.7) | 8.1 (4.4) | 4.9 (2.5) | 6.7 (3.3) | 19.4 (7.4) |
| London (1992–94) | 23.6 (23.7) | 20.3 (10.3) | 14.1 (5.8) | 22.9 (7.6) | 58.4 (19.5) |
| Milan (1990–97) | 32.5 (37.5) | 0.7 (1.0) | 0.5 (0.7) | 2.9 (2.2) | 9.2 (4.7) |
| Netherlands (1988–95) | 8.5 (7.7) | 5.9 (3.5) | 5.2 (2.7) | 27.0 (11.3) | 53.6 (21.8) |
| Paris (1992–96) | 17.7 (12.5) | 5.8 (3.8) | 7.7 (3.7) | 5.4 (3.2) | 23.4 (9.4) |
| Rome (1995–97) | 9.8 (9.9) | 1.8 (1.7) | 2.0 (1.6) | 9.2 (4.0) | 19.4 (7.1) |
| Stockholm (1988–96) | 6.8 (6.2) | 1.3 (1.3) | 1.3 (1.2) | 5.0 (2.5) | 10.3 (4.5) |