Change in knowledge of general practitioners during their professional careers.

In this study the level of knowledge of general practitioners (GPs) in different stages of their career, from the undergraduate level onwards to more than 20 years after certification, has been investigated. The total body of knowledge as well as the knowledge about different aspects of care was established. Participants were 108 medical students, 445 postgraduate trainees in six different stages of their training and 351 GPs with 5 to more than 20 years of experience. They all took the same written test, designed to assess knowledge closely related to patient care. An increase in test score was found from the start of postgraduate training onwards followed by a decrease starting 5-10 years after certification. The curves for the different aspects of care varied. It is concluded that the body of knowledge of GP-trainees increases during postgraduate training and reaches the level of knowledge of GPs who are less than 10 years certified. From 10 years after certification onwards the knowledge decreases as well as changes over time. The latter had also been found in two American studies relating to the knowledge of certified GPs and internists. The results seem important for the organization and content of postgraduate training and continuous medical education.