Table II.
Characteristics of practices and patients (SD).
| Intervention group | Control group | |
| Characteristics of practices | ||
| Number of practices | 22 | 22 |
| Number of general practitioners | 29 | 28 |
| Urban practice (>80 000 inhabitants) (%) | 38 | 27 |
| Single-handed practices (%) | 27 | 52 |
| Mean population/FTE | 2519 (346) | 2746 (414) |
| Mean number of asthma/COPD patients/1000 patients1 | 47 (25) | 51 (19) |
| Practices with active recall system (%) | 0 | 0 |
| Characteristics of patients in sample | ||
| Number of patients | 137 | 123 |
| Mean age | 59 (12) | 58 (10) |
| Males (%) | 42 | 48 |
| Dyspnoea score 1 or 2 (%) | 62 | 61 |
1Twelve intervention practices and 11 control practices could not supply these data.