Baseline characteristics of all randomised general practitioners(GPs)
| Expert support group | Control group | |
| GPs n | 36 | 42 |
| Type of practice | ||
| Single handed | 2 (5) | 4 (10) |
| Duo | 9 (25) | 9 (21) |
| Group (≥3 GPs) | 15 (42) | 19 (45) |
| Multidisciplinary healthcare centre | 10 (28) | 10 (24) |
| Male % | 64 | 57 |
| GP's experience with spirometry in yrs | 5.5±4.3 | 5.3±3.3 |
| Spirometry results interpreted per week | 1.4±0.8 | 1.4±0.7 |
| Prior experience with expert support % yes | 47 | 36 |
Data are presented as n (%) or mean±sd, unless otherwise indicated.