Bronchodilator use and symptom frequency of controlled and uncontrolled patients
| Subjects n | Use of as-needed bronchodilator per week | Days with asthma symptoms per week | Nights with asthma symptoms per week | ||||||||||
| 0 | 1–3 | 4–7 | >7 | 0 | 1–2 | 3–4 | 5–7 | 0 | 1–2 | 3–4 | 5–7 | ||
| Controlled | 4282 | 66 | 34 | 0 | 0 | 69 | 31 | 0 | 0 | 100 | 0 | 0 | 0 |
| Uncontrolled | 6023 | 23 | 29 | 25 | 22 | 13 | 31 | 27 | 30 | 35 | 37 | 17 | 11 |
Data are presented as %, unless otherwise stated.