Table E2.
BTS Step classification and medication of participants with asthma in the planar dynamic and SPECT/CT protocol
| BTS Asthma step (no. of patients in each category) | Median (range) daily ICS dose (μg BDP equivalent) | Oral daily prednisolone dose (mg) | Median (range) long-acting β2-adrenoceptor dose/d (μg) |
Therapies in addition to prn salbutamol (no. of patients) | |
|---|---|---|---|---|---|
| Formoterol | Salmeterol | ||||
| Step 1 (3) | 0 | 0 | 0 | 0 | Aminophylline (1) |
| Step 2 (1) | 400 | 0 | 0 | 0 | None |
| Step 3 (6) | 800 (700-800) | 0 | 24 (24-24) | 0 | Montelukast (2) |
| Step 4 (3) | 1200 (1000-1200) | 0 | 0 | 75 (50-100) | Montelukast (1) Tiotropium (1) |
| Step 5 (2) | 800 (800-800) | 7.5 (5-10) | 24 (24-24) | 0 | Tiotropium (2) Montelukast (1) |
BDP, Beclometasone dipropionate; BTS, British Thoracic Society.