Journal
MULTIPLE SCLEROSIS JOURNAL
Volume 22, Issue 2, Pages 193-200Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1352458515581873
Keywords
Multiple sclerosis; outcome measurement; relapsing-remitting
Categories
Funding
- Questcor
- National Multiple Sclerosis Society
- foundation for the Consortium of Multiple Sclerosis Centers
- NIH Building Interdisciplinary Research Careers in Women's Health (BIRCWH) program [5K12HD052163]
- NIH [R01NS071463]
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Background: Multiple sclerosis (MS) predominantly affects women with a sex ratio of 3:1 in contrast with a 1:1 sex ratio seen in pre-pubertal onset. Thus, puberty may influence MS risk differentially in males and females. How puberty may be associated with MS clinical features and disease course remains unknown. Objective: The objective of this paper is to determine the association of menarche with disease course in girls with MS. Methods: This is a longitudinal retrospective study from the UCSF Regional Pediatric MS Center database. We categorized patients by time of disease onset: pre-menarche, peri-menarche and post-menarche. Poisson regression models were used for within-subject relapse analyses offset by follow-up time. Results: Seventy-six girls were included (pre-menarche onset = 17; peri-menarche onset = 9; post-menarche onset = 50). Age of menarche was similar in all groups (Kruskal-Wallis p = 0.19). Relapse rate was the same in all three groups during the first two years of follow-up. In girls with follow-up overlapping at least two time periods, within-subject analyses showed increased relapses during the peri-menarche compared to post-menarche period (adjusted IRR = 8.5, 95% CI 2.5-28.7, p = 0.001). Conclusion: Pubertal status may influence MS course at least in female patients. Understanding how puberty influences MS clinical features may offer new insights into important factors regulating disease processes.
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