Reproduction and the risk of multiple sclerosis

Background: The incidence of multiple sclerosis (MS) in Denmark has doubled in women since 1970, whereas it has been almost unchanged in men. Objectives: To investigate whether age at first childbirth and number of births have an effect on the risk of developing MS. Methods: The cohort consisted of...

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Veröffentlicht in:Multiple sclerosis 2013-10, Vol.19 (12), p.1604-1609
Hauptverfasser: Magyari, Melinda, Koch-Henriksen, Nils, Pfleger, Claudia C, Sørensen, Per Soelberg
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Sprache:eng
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Zusammenfassung:Background: The incidence of multiple sclerosis (MS) in Denmark has doubled in women since 1970, whereas it has been almost unchanged in men. Objectives: To investigate whether age at first childbirth and number of births have an effect on the risk of developing MS. Methods: The cohort consisted of 1403 patients with MS of both sexes, identified through the Danish Multiple Sclerosis Registry, with clinical onset between 2000 and 2004. For each case, 25 control persons were drawn by random from the Danish Civil Registration System matched by sex, year of birth, and residential municipality. Results: More female cases than controls had no childbirths or fewer births before clinical onset (p=0.018) but only in the last five years preceding onset (p
ISSN:1352-4585
1477-0970
DOI:10.1177/1352458513481397