Journal
PHARMACEUTICALS
Volume 14, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/ph14020081
Keywords
dimethyl fumarate; natalizumab; drug efficacy; multiple sclerosis
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The study revealed that age plays a significant role in disability and treatment response in multiple sclerosis management. Patients treated with natalizumab were more likely to maintain a lower EDSS score and less likely to reach a higher score compared to those treated with dimethyl fumarate, with age being a key factor in these outcomes.
We investigated the comparative age-related efficacy of dimethyl fumarate (DMF) and natalizumab (NTZ) in clinical practice on multiple sclerosis (MS). Research in this area is lacking in the previous literature. In a three-year retrospective and clinical-paraclinical study, we compared 173 DMF patients and 94 NTZ patients with a similar average age (40 years) and disease duration (DD) (10 years). Expanded Disability Status Scale (EDSS) scores were higher in the NTZ group than in the DMF group at 3.5 vs. 2.5, respectively (p = 0.001). However, in both groups, age values correlated with DD (r = 0.42; p < 0.001), EDSS (r = 0.52; p < 0.001) and age at onset (r = 0.18; p < 0.001). Furthermore, age-adjusted Kaplan-Meier curves showed that NTZ-treated subjects maintained a 1.0-3.0 EDSS status score (p = 0.003) more frequently and a 3.5-7.0 score (p = 0.022) significantly less frequently compared with DMF-treated subjects. The EDSS percentage mean difference between NTZ and DMF groups was 81.6%, decreasing inversely with age (r = -0.34; p < 0.001). Finally, high EDSS score values were reached at the age of 39-40 years, regardless of their experimental group. We demonstrated age as a major contributor in disability and response to therapy in current management of MS. Thus, age should be considered in the risk/benefit evaluation in decision making for the disease modifying treatments in MS.
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