Confirmation of severe asthma in the analysed population
| Confirmed severe asthma | Not confirmed severe asthma | Missing data | Total | |
| Subjects | 1377 | 78 | 10 | 1465 |
| GINA step | ||||
| Step 1 | 0 | 1 (1) | 1 (0) | |
| Step 2 | 0 | 0 | 0 | |
| Step 3 | 24 (2) | 8 (10) | 32 (2) | |
| Step 4 | 565 (41) | 41 (53) | 606 (41) | |
| Step 5 | 788 (57) | 28 (36) | 816 (56) | |
| Unknown | 10 | 10 (1) | ||
| Patient follow-up <6 months | 0 | 73 (94) | 73 (5) |
Data are presented as n or n (%). GINA: Global Initiative for Asthma.