Abstract
Background
Treatments may become redundant in older patients with multiple sclerosis (MS). Our aim was to explore whether stopping treatments might be possible in patients aged over 50 with disease inactivity.
Methods
Patients over 50 were included from the population-based MS Lorraine registry if they had a relapsing–remitting course at onset and had experienced no relapse for ≥ 3 years. Patients who stopped treatments were defined as “stoppers”, and the others as “stayers”. The outcomes were the time to first relapse, to first disability progression, and to the occurrence of EDSS score of 6, assessed by multivariate analysis using a propensity score.
Results
132 stoppers and 366 stayers had a median follow-up of 7 years. There was no difference in Log-rank tests for the times to first relapse (p = 0.61) and to first disability progression (p = 0.22). In Cox models, stopping treatments was not associated with an increased risk of relapse (adjusted Hazard ratio (aHR) = 0.92 [0.72–1.16; p = 0.47]) or of an increase in EDSS score (aHR = 0.89 [0.71–1.13; p = 0.34]). However, stopping was associated with a higher risk of occurrence of EDSS score of 6 (aHR = 3.29 [2.22–4.86; p < 0.0001]), with a significant difference for the time to occurrence of EDSS score of 6 (p = 0.003).
Conclusion
Our study suggests that stopping injectable disease-modifying treatments, in patients over 50 with disease inactivity, is not associated with an increased risk of relapse or EDSS progression, but there might be a higher risk of reaching EDSS 6. These results have to be confirmed by interventional studies.
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Acknowledgements
The authors thank the patients and the research technicians for their contributions. The authors thank Felicity Neilson (Matrix Consultants) for medical English editing services.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Marc Soudant, Abdou Yacoubou Omorou, Guillaume Mathey and Anne-Laure Kaminsky. The first draft of the manuscript was written by Anne-Laure Kaminsky and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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The data collection for this study was approved by the French National Commission for Data Protection and Liberties (CNIL n° 8493536 and 8493536 bis).
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All the patients were informed that their data were recorded and that they may be used for research purposes according to the French Law concerning non-interventional research.
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Kaminsky, AL., Omorou, A.Y., Soudant, M. et al. Discontinuation of disease-modifying treatments for multiple sclerosis in patients aged over 50 with disease Inactivity. J Neurol 267, 3518–3527 (2020). https://doi.org/10.1007/s00415-020-10029-9
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DOI: https://doi.org/10.1007/s00415-020-10029-9