As the number of practicing neurologists has increased in the United States, the scope of neurologic practice has changed as well. It has been projected that the number of neurologists in the United States will have increased from 1920 in 1960 to 8078 in 1990, a change of 321%.1 Unless the roles of neurologists in the provision of health services in 1960 and 1990 are specified, however, the effects of this large and rapid increase in the total number of neurologists cannot be determined. Practice studies, therefore, are of great importance, since they may be expected to identify the scope and content of neurologic practice and care, ie, the role definition of a neurologist at a certain point in time. Moreover, comparative practice studies (over time, and in different regions) provide the scientific information that is necessary to examine the consequences that follow from differences in, and modifications of
Menken M. The 1985 National Ambulatory Medical Care Survey of Neurologists: A Clinician's Perspective. Arch Neurol. 1989;46(12):1346–1348. doi:10.1001/archneur.1989.00520480090025
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