1. Seasonality and clinical characteristics of MS in an equatorial country.
- Author
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Cárdenas-Robledo S, Arenas-Vargas LE, Carvajal-Parra MS, Guío-Sánchez C, and López-Reyes L
- Subjects
- Humans, Case-Control Studies, Disease Progression, Risk Factors, Multiple Sclerosis diagnosis, Multiple Sclerosis epidemiology, Multiple Sclerosis, Chronic Progressive, Multiple Sclerosis, Relapsing-Remitting
- Abstract
Background: Month and season of birth have been associated with risk of multiple sclerosis (MS), but there is relatively little evidence regarding their influence on the timing and severity of disease at onset., Objective: To assess whether month and season of birth influence the age and phenotype at onset of MS as well as its severity in a cohort of Colombian patients., Methods: This study is an analysis on MS cases only, drawn from a previously published case-control study. MS cases confirmed with current diagnostic criteria cared for at least once in our center were included. We assessed the influence of the month and season of birth in the age at MS onset, MS severity score, and age-related MS severity score using multiple and pairwise comparisons. Age at onset was also studied using Kaplan-Meier survival estimates compared with the log-rank test. The likelihood of progressive MS onset was evaluated with OR estimated from logistic regression models adjusted for age at onset and sex., Results: 668 MS cases were included. No significant differences were found in the age at MS onset according to month of birth or season of birth. Neither month of birth nor season of birth conferred significant differences in MS severity score or age-related MS severity score. No significant association was found between month (ORs ranging from 0.62 to 3.11, none significant) or season of birth (OR 0.91; 95 %CI: 0.46-1.84) with primary progressive MS., Conclusion: The month or season of birth do not appear to influence the age onset and phenotype of MS in our country., Competing Interests: Declaration of Competing Interest Simón Cárdenas-Robledo was a 2019–2020 ECTRIMS clinical fellow; in the past three years he has received travel expenses for scientific meetings from Merck and Genzyme; compensation for consulting services or participation on advisory boards from Merck, Biogen-Idec, Sanofi and Novartis; lecture fees from Novartis, Merck, Sanofi, Janssen and Biogen-Idec; and research support from Biogen-Idec. He is a subject editor on Multiple Sclerosis for Acta Neurológica Colombiana and a member of the editorial board of Frontiers of Neurology. Laura Estefanía Arenas-Vargas has received in the last three years travel expenses for scientific meetings from Biogen and Roche. Michael Steven Carvajal-Parra has nothing to disclose. Claudia Guío-Sánchez is an ECTRIMS clinical fellowship awardee 2022–2023; has received consulting fees from Novartis, Biogen-Idec, Sanofi-Genzyme, Merck, Bristol Myers Squibb, and Roche; travel expenses for scientific meetings from Sanofi-Genzyme, Biogen-Idec, Abbot, and Merck. Lorena López-Reyes has received in the last three years compensation for academic talks from Roche, Merck, and Biogen-Idec., (Copyright © 2023 Elsevier B.V. All rights reserved.)
- Published
- 2024
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