• J. Neurol. Neurosurg. Psychiatr. · Apr 2022

    Shift of multiple sclerosis onset towards older age.

    • Luca Prosperini, Matteo Lucchini, Serena Ruggieri, Carla Tortorella, Shalom Haggiag, Massimiliano Mirabella, Carlo Pozzilli, and Claudio Gasperini.
    • Dept. of Neurosciences, S. Camillo-Forlanini Hospital, Roma, Italy luca.prosperini@gmail.com.
    • J. Neurol. Neurosurg. Psychiatr. 2022 Apr 27.

    ObjectiveTo explore whether age at onset increased over time despite a shortened interval from the initial clinical demyelinating event to the diagnosis of multiple sclerosis (MS), as promoted by updated diagnostic criteria.MethodsThis was an independent, multicentre, retrospective study based on data from 4345 patients with relapsing-onset MS attending three tertiary MS Clinics in Italy. After stratifying the year of MS onset into four periods (<1991, 1991-2000, 2001-2010, 2011-2021), we analysed the temporal trends in age at onset and interval from onset to diagnosis; we then explored the female-to-male ratio and onset location across different classes of age at onset.ResultsWe observed an increased mean age at onset, and a shortened mean interval to diagnosis over time (p<0.0001). Accordingly, there were more MS onsets at the older age classes of 40-49, 50-59 and ≥60 years (p<0.0001). In cases with age at onset ≥40 years, we also found an increased female-to-male ratio (p=0.007), more frequent spinal cord (p=0.0004) and less frequent supratentorial onset (p=0.008).ConclusionOur study shows a forward shift towards an older age at onset of MS, thus suggesting considerable thought on the place-in-therapy of most currently used disease-modifying treatments, and on the standard of care to an older population.© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.

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