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Home > Medical Reference > Patient EducationServices at Maryland GeneralA complete list of inpatient and outpatient healthcare services at MGH.Multiple sclerosis - Risk Factors
DescriptionAn in-depth report on the causes, diagnosis, and treatment of MS.Risk Factors:About 400,000 Americans and 2.5 million people worldwide suffer from MS. AgeOnset occurs between the ages of 20 and 50 years in 70% of patients with the average age about 30. The disease also occurs in both younger and older individuals. It rarely develops before age 15 or after age 60, however. GenderMS is about 2.5 times more common among women than men. The gender gap is strongest among people who develop MS at a younger age. However, some research indicates that men may be more disabled by the disease than women. Race and EthnicityMultiple sclerosis occurs worldwide but is most common in Caucasian people of northern European origin, especially those of Scottish descent. Family HistoryA family history of the disease may put some people at risk for MS, although the risk for someone inheriting all the genetic factors contributing to MS is only about 2 - 4%. Some research indicates that family members who have MS tend to develop the disease at around the same age. However, family history does not predict whether one family member will experience the same disease severity as another family member. Possible Protective FactorsEstrogen and Oral Contraceptives. Higher estrogen levels may temporarily lower the risk of developing multiple sclerosis. Studies indicate that oral contraceptives (which contain estrogen) and pregnancy delay the onset of multiple sclerosis. The risk for a first clinical attack increases, however, in the 6 months after a woman gives birth. Resources
ReferencesCalabresi P. Multiple sclerosis and demyelinating conditions of the central nervous system. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 436. Correale J, Fiol M, Gilmore W. The risk of relapses in multiple sclerosis during systemic infections. Neurology. 2006 Aug 22;67(4):652-9. Epub 2006 Jul 26. Farinotti M, Simi S, Di Pietrantonj C, McDowell N, Brait L, Lupo D, Filippini G. Dietary interventions for multiple sclerosis. Cochrane Database Syst Rev. 2007 Jan 24;(1):CD004192. Goodin DS, Cohen BA, O'Connor P, Kappos L, Stevens JC; Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology. Assessment: the use of natalizumab (Tysabri) for the treatment of multiple sclerosis (an evidence-based review): report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology. Neurology. 2008 Sep 2;71(10):766-73 International Multiple Sclerosis Genetics Consortium, Hafler DA, Compston A, Sawcer S,Lander ES, Daly MJ, et al. Risk alleles for multiple sclerosis identified by a genomewide study. N Engl J Med. 2007 Aug 30;357(9):851-62. Epub 2007 Jul 29. Kappos L, Freedman MS, Polman CH, Edan G, Hartung HP, Miller DH, et al. Effect of early versus delayed interferon beta-1b treatment on disability after a first clinical event suggestive of multiple sclerosis: a 3-year follow-up analysis of the BENEFIT study. Lancet. 2007 Aug 4;370(9585):389-97. Khan F, Ng L, Turner-Stokes L. Effectiveness of vocational rehabilitation intervention on the return to work and employment of persons with multiple sclerosis. Cochrane Database Syst Rev. 2009 Jan 21;(1):CD007256002819. Lovera J, Bagert B, Smoot K, Morris CD, Frank R, Bogardus K, et al. Ginkgo biloba for the improvement of cognitive performance in multiple sclerosis: a randomized, placebo-controlled trial. Mult Scler. 2007 Apr;13(3):376-85. Epub 2007 Jan 29. Multiple Sclerosis Therapy Consensus Group (MSTCG), Wiendl H, Toyka KV, Rieckmann P, Gold R, Hartung HP, et al. Basic and escalating immunomodulatory treatments in multiple sclerosis: current therapeutic recommendations. J Neurol. 2008 Oct;255(10):1449-63. Epub 2008 Oct 29. Prakash RS, Snook EM, Lewis JM, Motl RW, Kramer AF. Cognitive impairments in relapsing-remitting multiple sclerosis: a meta-analysis. Mult Scler. 2008 Nov;14(9):1250-61. Epub 2008 Aug 13. Ransohoff RM. Natalizumab for multiple sclerosis. N Engl J Med. 2007 Jun 21;356(25):2622-9. Rojas JI, Romano M, Ciapponi A, Patrucco L, Cristiano E. Interferon beta for primary progressive multiple sclerosis. Cochrane Database Syst Rev. 2009 Jan 21;(1):CD006643. Schippling S, Heesen C, Zander A, Martin R. Stem cell transplantation in multiple sclerosis. J Neurol. 2008 Dec;255 Suppl 6:43-7. Wiendl H, Hohlfeld R. Multiple sclerosis therapeutics: unexpected outcomes clouding undisputed successes. Neurology. 2009 Mar 17;72(11):1008-15.
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