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An increase in the incidence of multiple sclerosis in Western Norway
Author(s) -
Larsen Jan P.,
Kvaale Gunnar,
Riise Trond,
Nyland Harald,
Aarli Johan A.
Publication year - 1984
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1984.tb00809.x
Subject(s) - incidence (geometry) , demography , population , medicine , multiple sclerosis , epidemiology , immunology , physics , sociology , optics
– 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.