Effect of immigration on multiple sclerosis sex ratio in Canada: the Canadian Collaborative Study.

@article{Orton2010EffectOI,
  title={Effect of immigration on multiple sclerosis sex ratio in Canada: the Canadian Collaborative Study.},
  author={S M Orton and Sreeram V Ramagopalan and D. Brocklebank and Blanca Marcela Herrera and David A Dyment and Irene Mei Ling Yee and Adele Dessa Sadovnick and George Cornell Ebers},
  journal={Journal of neurology, neurosurgery, and psychiatry},
  year={2010},
  volume={81 1},
  pages={31-6}
}
BACKGROUND The ratio of female to male (F:M) multiple sclerosis (MS) cases varies geographically, generally being greater in areas of high prevalence. In many regions, including Canada, rising MS incidence in women has been implied by the marked increase in F:M ratio. METHODS We examined the F:M ratio over time in MS patients in the Canadian Collaborative Study born outside Canada, with onset postmigration (n = 2531). We compared the trends to native-born Canadians, by region of origin and… CONTINUE READING

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