Comparing functional impact of multiple sclerosis on two populations in France, in the Caribbean Sea and in Europe, in regard of care level

•There was no significant difference between population from Europe and population from Caribbean Sea across almost all demographic criteria, no effect of migration was observed in those two region of France•There was no significant difference on MSSS between the two French MS populations, one living in the Caribbean Sea and the other in Europe.•This study is the first comparing two region of France that highlights a sufficiently strong care system across France, allowing to absorb environmental and medical/paramedical demographic disparities for low EDSS patients.