Patient flow
| Budesonide/formoterol | Budesonide | Formoterol | Placebo | Total | |
| Patients randomised | 208 | 198 | 201 | 205 | 812 |
| Patients discontinued after randomisation# | 59 (28)*** | 62 (31)* | 64 (32)* | 90 (44) | 275 |
| Patients discontinued due to COPD deterioration# | 20 (10)*** | 23 (12)* | 29 (14)* | 43 (21) | 115 |
| Patients discontinued due to AEs other than COPD deterioration | 16 (8) | 13 (7) | 12 (6) | 17 (8) | 58 |
| Patients completing study | 149 (72) | 136 (69) | 137 (68) | 115 (56) | 537 |
Data are presented as n (%) unless otherwise stated
*: p<0.05
***: p<0.001 versus placebo
#: Cox regression model