Journal
ARQUIVOS DE NEURO-PSIQUIATRIA
Volume 71, Issue 9A, Pages 573-579Publisher
ASSOC ARQUIVOS NEURO- PSIQUIATRIA
DOI: 10.1590/0004-282X20130098
Keywords
South America; multiple sclerosis; sun exposure
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Funding
- Latin American Congress of Treatment and Research in Multiple Sclerosis (LACTRIMS)
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Objective: To assess whether the month of birth in different latitudes of South America might influence the presence or severity of multiple sclerosis (MS) later in life. Methods: Neurologists in four South American countries working at MS units collected data on their patients' month of birth, gender, age, and disease progression. Results: Analysis of data from 1207 MS patients and 1207 control subjects did not show any significant variation in the month of birth regarding the prevalence of MS in four latitude bands (0-10; 11-20; 21-30; and 31-40 degrees). There was no relationship between the month of birth and the severity of disease in each Latitude band. Conclusion: The results from this study show that MS patients born to mothers who were pregnant at different Southern latitudes do not follow the seasonal pattern observed at high Northern latitudes.
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