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. 2024 Aug;271(8):5074-5082.
doi: 10.1007/s00415-024-12448-4. Epub 2024 May 28.

Progression independent of relapse activity in relapsing multiple sclerosis: impact and relationship with secondary progression

Affiliations

Progression independent of relapse activity in relapsing multiple sclerosis: impact and relationship with secondary progression

Emilio Portaccio et al. J Neurol. 2024 Aug.

Erratum in

Abstract

Objectives: We investigated the occurrence and relative contribution of relapse-associated worsening (RAW) and progression independent of relapse activity (PIRA) to confirmed disability accrual (CDA) and transition to secondary progression (SP) in relapsing multiple sclerosis (MS).

Methods: Relapsing-onset MS patients with follow-up > / = 5 years (16,130) were extracted from the Italian MS Registry. CDA was a 6-month confirmed increase in Expanded Disability Status Scale (EDSS) score. Sustained disability accumulation (SDA) was a CDA with no EDSS improvement in all subsequent visits. Predictors of PIRA and RAW and the association between final EDSS score and type of CDA were assessed using logistic multivariable regression and multivariable ordinal regression models, respectively.

Results: Over 11.8 ± 5.4 years, 16,731 CDA events occurred in 8998 (55.8%) patients. PIRA (12,175) accounted for 72.3% of CDA. SDA occurred in 8912 (73.2%) PIRA and 2583 (56.7%) RAW (p < 0.001). 4453 (27.6%) patients transitioned to SPMS, 4010 (73.2%) out of 5476 patients with sustained PIRA and 443 (24.8%) out of 1790 patients with non-sustained PIRA. In the multivariable ordinal regression analysis, higher final EDSS score was associated with PIRA (estimated coefficient 0.349, 95% CI 0.120-0.577, p = 0.003).

Discussion: In this real-world relapsing-onset MS cohort, PIRA was the main driver of disability accumulation and was associated with higher disability in the long term. Sustained PIRA was linked to transition to SP and could represent a more accurate PIRA definition and a criterion to mark the putative onset of the progressive phase.

Keywords: Multiple sclerosis; Progression independent of relapse activity; Relapse-associated worsening; Secondary progression.

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Conflict of interest statement

E. Portaccio received compensation for travel grants, participation in advisory board and/or speaking activities from Biogen, Merck Serono, Sanofi, Teva, Roche, BMS Cellgene, Janssen and Novartis; serves on the editorial board of Frontiers in Neurology and Brain Sciences. M. Betti reports no disclosures. E. De Meo reports no disclosures. I. Addazio reports no disclosures. L. Pastò received research support from Novartis, Biogen and speaker honoraria from Teva. L. Razzolini received research support from Novartis. R. Totaro received funding for travel or speaker honoraria from Alfa Wasserman, Bayer, Biogen, CLS Bering, Merck Serono, Novartis, Sanofi Aventis, Roche, and Teva. D. Spitaleri received honoraria as a consultant on scientific advisory boards by Bayer Schering, Novartis and Sanofi Aventis and compensation for travel from Novartis, Biogen, Sanofi Aventis, Teva and Merck. A. Lugaresi served as a Biogen, Merck, Mylan, Novartis, Roche, Sanofi/Genzyme and Teva Advisory Board Member. She received congress and travel/accommodation expense compensations or speaker honoraria from Biogen, Merck, Mylan, Novartis, Sanofi/Genzyme, Teva and Fondazione Italiana Sclerosi Multipla (FISM). Her institutions received research grants from Novartis. E. Cocco received research grants and honoraria as a speaker and member of advisory boards by: Almirall, Bayer, Biogen Idec, Merck Serono, Novartis, Sanofi–Genzyme, Teva, Roche. M. Onofrj reports no disclosures. F. Di Palma reports no disclosures. F. Patti received honoraria for speaking activities by Almirall, Bayer Schering, Biogen Idec, Merck Serono, Novartis, Roche, Sanofi–Genzyme, and Teva; he also served as advisory board member the following companies: Alexion, Almirall, BMS Cellgene, Janssen, Bayer Schering, Biogen Idec, Merck Serono, Novartis, Roche, Sanofi–Genzyme, and Teva; he was also funded by Biogen, Merck, Novartis, Reload Association, Italian Health Minister, Italian University Minister University of Catania and FISM for epidemiological studies; he received grants for congress participation from Almirall, Bayer Schering, Biogen Idec, Merck Serono, Novartis, Roche, Sanofi–Genzyme, and Teva. D. Maimone received compensations for congress and travel expenses and participation in advisory boards by Bayer, Biogen, Bristo Myers Squibb, Merck, Novartis, Roche, Sanofi. P. Valentino received grants to attend scientific congresses or speaker honoraria from Biogen, Merck Serono, Novartis, and Roche. V. Torri Clerici received honoraria for speaking or writing from Novartis, Sanofi–Genzyme, Almirall, Bristol Meyer Squibb and Horizon; she acted as an Advisory Board member for Biogen, Lundbeck, Novartis, Sanofi–Genzyme, Bristol Meyer Squibb, Roche, Almirall and Merck Serono. She is involved as principal investigator in clinical trials for Sanofi–Genzyme, FISM, Bristol Meyer Squibb, Roche and Merck Serono; she has received support for research projects from Almirall. A. Protti reports no disclosures. D. Ferraro has received travel grants and/or fees for speaking and/or advisory boards from Alexion, Biogen, Bristol-Myers Squibb, Celgene, Merck, Novartis, Roche, Sanofi. G. Lus reports no disclosures. G.T. Maniscalco received personal compensation from Serono, Biogen, Novartis, Roche and Teva for public speaking and advisory boards. V. Brescia Morra received grants to attend scientific congresses or speaker honoraria from Biogen, Merck Serono, Novartis, Roche, Sanofi/Genzyme, and Teva. G. Salemi received grants to attend scientific congresses or speaker honoraria from Biogen, Merck Serono, Novartis, Roche, Sanofi/Genzyme, Teva. Alexion, BMS Cellgene, and Horizon. F. Granella received grants to attend scientific congresses or speaker honoraria from Biogen, Merck Serono, Novartis, Roche, Sanofi/Genzyme, and Teva. I. Pesci reports no disclosures. R. Bergamaschi has served on scientific advisory boards for Biogen, Merck Serono, Novartis, Sanofi–Genzyme; received research support from Almirall, Bayer, Biogen, Merck Serono, Novartis, Sanofi–Genzyme; received support for travel and congress from Biogen, Roche, Merck Serono, Sanofi–Genzyme, Teva; received honoraria for speaking engagement from Biogen, Merck Serono, Novartis, Sanofi–Genzyme. U. Aguglia received grants to attend scientific congresses or speaker honoraria from Biogen, Merck Serono, Novartis, Roche, Sanofi/Genzyme, and Teva. M. Vianello received compensation for travel grants or speaking activities from Biogen, Merck Serono, Roche, BMS Cellgene, Janssen and Novartis. M. Simone reports no disclosures. V. Lepore reports no disclosures. P. Iaffaldano received grants to attend scientific congresses or speaker honoraria from Biogen, Merck Serono, Novartis, Roche, Sanofi/Genzyme, and Teva. G. Comi received consulting fees from Actelion, Bayer Schering, Merck Serono, Novartis, Sanofi, and Teva, and lecture fees from Bayer Schering, Biogen Dompé, Merck Serono, Novartis, Sanofi, Serono, Symposia International Foundation, and Teva. M. Filippi is Editor-in-Chief of the Journal of Neurology; received compensation for consulting services and/or speaking activities from Bayer, Biogen Idec, Merck Serono, Novartis, Roche, Sanofi–Genzyme, Takeda, and Teva Pharmaceutical Industries; and still receives research support from Biogen Idec, Merck Serono, Novartis, Roche, Teva Pharmaceutical Industries, Italian Ministry of Health, Fondazione Italiana Sclerosi Multipla, and ARiSLA (Fondazione Italiana di Ricerca per la SLA). M. Trojano received travel and/or Speaker honoraria from Sanofi Aventis, Genzyme, Biogen Idec, Teva, Merck, Serono and Novartis reported receiving speaker honoraria and research grants to her institution from and serving on advisory boards of Biogen, Merck Serono, and Novartis. M.P. Amato served on scientific advisory boards for and has received speaker honoraria and research support from Biogen Idec, Merck Serono, Bayer Schering Pharma, and Sanofi Aventis, and serves on the editorial board of Multiple Sclerosis Journal and BMC Neurology.

Figures

Fig. 1
Fig. 1
Flow chart of the study population. MS Multiple sclerorsis, CIS Clinically isolated syndrome, RR Relapsing remitting, EDSS Expanded disability status scale

References

    1. Jakimovski D, Bittner S, Zivadinov R et al (2023) Multiple sclerosis. Lancet. 10.1016/S0140-6736(23)01473-3 10.1016/S0140-6736(23)01473-3 - DOI - PubMed
    1. Lublin FD, Reingold SC, Cohen JA et al (2014) Defining the clinical course of multiple sclerosis: the 2013 revisions. Neurology 83(3):278–286 10.1212/WNL.0000000000000560 - DOI - PMC - PubMed
    1. Kappos L, Wolinsky JS, Giovannoni G et al (2020) Contribution of relapse-independent progression vs relapse-associated worsening to overall confirmed disability accumulation in typical relapsing multiple sclerosis in a pooled analysis of 2 randomized clinical trials. JAMA Neurol 77(9):1132–1140. 10.1001/jamaneurol.2020.1568 10.1001/jamaneurol.2020.1568 - DOI - PMC - PubMed
    1. Lublin FD, Häring DA, Ganjgahi H et al (2022) How patients with multiple sclerosis acquire disability. Brain. 10.1093/brain/awac016 10.1093/brain/awac016 - DOI - PMC - PubMed
    1. Cree BAC, Hollenbach JA, Bove R et al (2019) Silent progression in disease activity-free relapsing multiple sclerosis. Ann Neurol 85(5):653–666. 10.1002/ana.25463 10.1002/ana.25463 - DOI - PMC - PubMed

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