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Acta Neurol Scand. 1984 Aug;70(2):96-103.

An increase in the incidence of multiple sclerosis in western Norway.


In the county of Hordaland, Western Norway, the prevalence of MS has been shown to have increased from 20/100,000 in 1963 to 60/100,000 in 1983. This study shows that the increase in prevalence was caused by a highly significant and marked increase in incidence over a 30-year period. The average annual incidence of about 2 per 100,000 population in 1953-1962 increased to 4 per 100,000 in the period 1968-1977. The rise in incidence was parallel for both sexes until 1970. In the last 10 years, the incidence has continued to increase among females, whereas a decrease has been observed among males.

[Indexed for MEDLINE]

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