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Early high-efficacy treatment significantly reduces long-term disability in children with MS

By Priscilla Lynch - 04th Nov 2024

children with MS

New research presented at ECTRIMS 2024 suggests that initiating monoclonal antibody therapy during childhood, rather than delaying treatment until early adulthood, significantly reduces long-term disability in multiple sclerosis (MS) patients.

The study, which utilised data from the French MS Registry, Italian MS Register, and the global MS Base Registry, analysed the outcomes of 282 patients with paediatric-onset MS who began experiencing symptoms before the age of 18 years. Patients were divided into two groups based on when they initiated monoclonal antibody treatment: Either between the ages of 12-17 or 20-22 years.

To ensure comparability between the groups, the researchers used inverse probability treatment weighting based on propensity scores, which accounted for baseline differences in factors such as sex, age at symptom onset, time from onset to clinically definite MS, and the number of relapses. This approach enabled a clear assessment of how the timing of initiating high-efficacy therapy affects disability outcomes from ages 23 and over.

Using the Expanded Disability Status Scale (EDSS) to measure and monitor disability progression in MS, the study showed that patients who began treatment between the ages of 12-17 years (39 per cent of the study group) had a mean absolute increase of only 0.40 points on the EDSS, compared to a 0.95-point increase in those who started treatment later (61 per cent of the study group).

Between the ages of 23 and 27 years, the increase in EDSS scores from baseline was 0.57 points lower in the early treatment group compared to the late treatment group. The benefits of early treatment persisted throughout the median follow up period of 10.8 years.

Dr Sifat Sharmin, research fellow in the Clinical Outcomes Research (CORe) Unit at the University of Melbourne and leader of the study, said the findings highlight the critical importance of early intervention in paediatric-onset MS. “The substantially lower risk of progressing to higher disability levels in the early treatment group was particularly evident in the moderate disability range, where further progression was reduced by up to 97 per cent.”

Currently, regulatory restrictions, due to limited evidence of the efficacy, safety, and impact of monoclonal antibodies on children’s development, often delay access to these treatments for paediatric-onset MS patients until adulthood. “These findings are a strong argument for rethinking current treatment guidelines,” Dr Sharmin maintained. “By allowing earlier access to effective treatments, we can significantly enhance the quality-of-life for children with MS and reduce the burden of long-term disability.”

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