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Age at Menarche and Risk of Multiple Sclerosis (Ms): A Systematic Review and Meta-Analysis Publisher Pubmed



Azimi A1 ; Hanaei S2, 3 ; Sahraian MA1 ; Mohammadifar M4 ; Ramagopalan SV5 ; Ghajarzadeh M6
Authors
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Authors Affiliations
  1. 1. Multiple Sclerosis Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Research Center for Immunodeficiencies (RCID), Tehran University of Medical Sciences (TUMS), Tehran, Iran
  3. 3. Universal Scientific Education and Research Network (USERN), Tehran university of medical sciences, Tehran, Iran
  4. 4. Department of Radiology, Zanjan University of Medical Sciences, Zanjan, Iran
  5. 5. Bristol-Myers Squibb, Uxbridge, United Kingdom
  6. 6. Universal Council of Epidemiology (UCE), Universal Scientific Education and Research Network (USERN), Tehran University of Medical Sciences, Tehran, Iran

Source: BMC Neurology Published:2019


Abstract

Background: Some studies have looked at the age at menarche and risk of Multiple Sclerosis (MS).We aimed to conduct a systematic review and meta-analysis to estimate a pooled odds ratio of developing MS by increasing age at menarche. Methods: We searched PubMed, Scopus, EMBASE, CINAHL, Web of Science, Ovid, google scholar and gray literature (references of references, congress abstracts) up to 10th April 2019. Results: The literature search found 312 articles. After eliminating duplicates, reviews, case reports and trials, 18 articles remained. Three articles were ultimately included in the final analysis. Two studies were from Iran, and one from Canada. The pooled odds ratio (OR) for increasing 1 year of age at menarche was 0.88 (95% CI:0.82-0.94), with no significant heterogeneity (I2 = 49%, p = 0.1). Mean age at menarche was significantly different between case and control groups (mean difference = - 0.22, 95% CI = -0.42,-0.02). Conclusion: The result of this systematic review showed that the risk of MS decreases by increasing age at menarche. © 2019 The Author(s).
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