Multiple Sclerosis in Rural Norway

Abstract

THE investigation of the distribution of cases of multiple sclerosis in Switzerland between the years 1918 and 1922 seems to have established that the frequency of this disease can vary greatly in different geographic locations.¹ The subsequent studies by Gram² in Denmark and more recent investigations in the United States^{3 , 4} leave little doubt that these variations may be real and not due to technical errors in diagnosis, methods of collecting the data and so forth.In another study, Swank⁵ has suggested the possibility that these variations are related directly to the amount (and possibly the nature) of the fat consumption. . . .