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Risk of requiring a wheelchair in primary progressive multiple sclerosis: Data from the ORATORIO trial and the MSBase registry

  • Helmut Butzkueven
  • , Tim Spelman
  • , Dana Horakova
  • , Stella Hughes
  • , Claudio Solaro
  • , Guillermo Izquierdo
  • , Eva Kubala Havrdová
  • , Francois Grand'Maison
  • , Alexandre Prat
  • , Marc Girard
  • , Raymond Hupperts
  • , Marco Onofrj
  • , Alessandra Lugaresi
  • , Bruce Taylor
  • , the MSBase Study Group
  • , Gavin Giovannoni
  • , Ludwig Kappos
  • , Stephen L. Hauser
  • , Xavier Montalban
  • , Licinio Craveiro
  • Rita Freitas, Fabian Model, James Overell, Erwan Muros-Le Rouzic, Annette Sauter, Qing Wang, David Wormser, Jerry S. Wolinsky

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background and purpose: Reaching Expanded Disability Status Scale (EDSS) ≥7.0 represents the requirement for a wheelchair. Here we (i) assess the effect of ocrelizumab on time to EDSS ≥7.0 over the ORATORIO (NCT01194570) double-blind and extended controlled periods (DBP+ECP), (ii) quantify likely long-term benefits by extrapolating results, and (iii) assess the plausibility of extrapolations using an independent real-world cohort (MSBase registry; ACTRN12605000455662). Methods: Post hoc analyses assessing time to 24-week confirmed EDSS ≥7.0 in two cohorts of patients with primary progressive multiple sclerosis (baseline EDSS 3.0–6.5) were investigated in ORATORIO and MSBase. Results: In the ORATORIO DBP+ECP, ocrelizumab reduced the risk of 24-week confirmed EDSS ≥7.0 (hazard ratio = 0.54, 95% confidence interval [CI]: 0.31–0.92; p = 0.022). Extrapolated median time to 24-week confirmed EDSS ≥7.0 was 12.1 and 19.2 years for placebo and ocrelizumab, respectively (7.1-year delay [95% CI: −4.3 to 18.4]). In MSBase, the median time to 24-week confirmed EDSS ≥7.0 was 12.4 years. Conclusions: Compared with placebo, ocrelizumab significantly delayed time to 24-week confirmed wheelchair requirement in ORATORIO. The plausibility of the extrapolated median time to reach this milestone in the placebo group was supported by observed real-world data from MSBase. Extrapolated benefits for ocrelizumab over placebo could represent a truly meaningful delay in loss of ambulation and independence.

Original languageEnglish
Pages (from-to)1082-1090
Number of pages9
JournalEuropean Journal of Neurology
Volume29
Issue number4
DOIs
Publication statusPublished - Apr 2022

Keywords

  • disease progression
  • ocrelizumab
  • primary progressive multiple sclerosis
  • wheelchair

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