Table 1 Patient characteristics
N = 4492 n (%) | ||
|---|---|---|
Age (years)a | < 30 | 850 (19.0) |
30–60 | 3077 (68.8) | |
> 60 | 543 (12.2) | |
Sexb | Male | 1819 (40.5) |
Female | 2672 (59.5) | |
Asthma historyb | Yes | 293 (6.5) |
No | 4168 (92.8) | |
Unknown | 30 (0.7) | |
Smoking statusb | Never | 3381 (75.3) |
Ever | 635 (14.1) | |
Current | 475 (10.6) | |
Area of residenceb | Urban | 3208 (71.4) |
Rural | 1283 (28.6) | |
Allergy historyb | Yes | 992 (22.1) |
No | 2832 (63.1) | |
Unknown | 667 (14.9) | |
GINA 2006 severitya | Intermittent | 173 (3.9) |
Mild | 538 (12.0) | |
Moderate | 1013 (22.6) | |
Severe | 2767 (61.6) |