Epidemiologic trends of multiple sclerosis in Puerto Rico (2013-2020).

Background: Previous studies have demonstrated higher multiple sclerosis (MS) incidence and prevalence in Puerto Rico (PR) than in other Caribbean and Latin American countries. Our objectives are to update the epidemiologic trends in MS incidence and prevalence rates for PR from 2017 through 2020 and compare them to prior rate data from 2013 to 2016.

Methods: We used the Puerto Rico MS Foundation's registry (PRMS Registry) data to identify all newly diagnosed MS cases between January 2017 and December 2020.