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  • Title: Comparative discontinuation, effectiveness, and switching practices of dimethyl fumarate and fingolimod at 36-month follow-up.
    Author: Vollmer B, Ontaneda D, Harris H, Nair K, Bermel RA, Corboy JR, Fox RJ, Vollmer T, Cohen JA, Alvarez E, Hersh CM.
    Journal: J Neurol Sci; 2019 Dec 15; 407():116498. PubMed ID: 31644992.
    Abstract:
    BACKGROUND: Dimethyl fumarate (DMF) and fingolimod (FTY) are approved oral disease modifying therapies (DMTs) for relapsing multiple sclerosis (MS). There are currently no known head-to-head studies comparing DMF and FTY over 36 months, which leaves their relative effectiveness unknown. OBJECTIVE: To assess real-world discontinuation, effectiveness, and switching practices of DMF and FTY over 36 months along with disease activity after switching DMT. METHODS: Patients prescribed DMF (n = 737) and FTY (n = 535) from two academic MS centers were retrospectively reviewed. Discontinuation and effectiveness outcomes were assessed using propensity score (PS) weighting. PS model covariates included sociodemographics and clinical and MRI characteristics. RESULTS: Discontinuation was more common in DMF (58.3%) versus FTY (45.2%) over 36 months [OR = 1.81, 95% CI (1.41-2.31), p < .001], largely driven by intolerance [OR = 1.63, 95% CI (1.18-1.73), p < .001]. There were no differences in clinical relapses [OR = 1.27, 95% CI (0.90-1.79), p = .17], gadolinium-enhancing (GdE) lesions [OR = 1.25, 95% CI (0.85-1.84), p = .26], or new T2-hyperintense lesions [OR = 0.99, 95% CI (0.74-1.32), p = .93]. Within 12 months of DMF/FTY discontinuation, switchers to highly effective therapy (HET) versus other DMTs (injectables/orals) had fewer relapses (DMF/HET, 5.9% versus DMF/Other, 14.2%, p = .03; FTY/HET, 11.6% versus FTY/Other, 18.0%, p = .04) and fewer GdE lesions post-FTY (DMF/HET, 10.3% versus DMF/Other, 14.3%, p = .36; FTY/HET, 11.9% versus FTY/Other, 21.5%, p = .04). CONCLUSION: This combined analysis showed similar effectiveness for DMF and FTY over 36 months with higher DMF discontinuations. Disease activity was lower in switchers to HET versus injectable/oral therapies after DMF/FTY cessation.
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