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. 2014 Nov;20(13):1780-2.
doi: 10.1177/1352458514525871. Epub 2014 Mar 6.

High prevalence and no latitude gradient of multiple sclerosis in Norway

P Berg-Hansen  1 , S M Moen  2 , H F Harbo  2 , E G Celius  2
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High prevalence and no latitude gradient of multiple sclerosis in Norway

P Berg-Hansen et al. Mult Scler. 2014 Nov.

Abstract

The prevalence of multiple sclerosis (MS) is increasing, and the presence of a latitude gradient for MS risk is still discussed. We present the first nationwide prevalence estimates for Norway, spanning the latitudes from 58-71 degrees North, in order to identify a possible latitude gradient. Information from the Oslo MS Registry and the Norwegian MS Registry and Biobank was combined with data from the Norwegian Patient Registry, the Norwegian Prescription Database and Statistics Norway. We estimated a crude prevalence of 203/100,000 on 1 January 2012. The prevalence in the Northern and Southern regions were not significantly different. MS prevalence in Norway is among the highest reported worldwide. We found no evidence of a latitude gradient.

Keywords: Epidemiology; Norway; latitude; latitude gradient; multiple sclerosis; prevalence.

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