Table 2

Characteristics of participating and non-participating general practitioners (GPs)

Mean (SD) age in 1994Percentage of womenMean (SD) number of GPs working togetherPercentages 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)22.62.4 (1.3)66.8
Non-participating GPs45.3 (10.0)21.62.5 (1.5)39.2