Characteristics of participating and non-participating general practitioners (GPs)
| Mean (SD) age in 1994 | Percentage of women | Mean (SD) number of GPs working together | Percentages of GPs board certified as specialists | |
|---|---|---|---|---|
| *Data from records of doctors in Norway. | ||||
| **Data given in the return letters from GPs invited to participate in the study. | ||||
| Participating GPs (n=199) | 44.1 (7.4) | 22.6 | 2.4 (1.3) | 66.8 |
| Non-participating GPs | 45.3 (10.0) | 21.6 | 2.5 (1.5) | 39.2 |
| n=432* | n=435* | n=182** | n=434* | |