RT Journal Article T1 Anti-inflammatory disease-modifying treatment and short-term disability progression in SPMS. A1 Lorscheider, Johannes A1 Jokubaitis, Vilija G A1 Spelman, Tim A1 Izquierdo, Guillermo A1 Lugaresi, Alessandra A1 Havrdova, Eva A1 Horakova, Dana A1 Trojano, Maria A1 Duquette, Pierre A1 Girard, Marc A1 Prat, Alexandre A1 Grand'Maison, François A1 Grammond, Pierre A1 Pucci, Eugenio A1 Boz, Cavit A1 Sola, Patrizia A1 Ferraro, Diana A1 Spitaleri, Daniele A1 Lechner-Scott, Jeanette A1 Terzi, Murat A1 Van Pesch, Vincent A1 Iuliano, Gerardo A1 Bergamaschi, Roberto A1 Ramo-Tello, Cristina A1 Granella, Franco A1 Oreja-Guevara, Celia A1 Butzkueven, Helmut A1 Kalincik, Tomas A1 MSBase Study Group, AB To investigate the effect of disease-modifying treatment on short-term disability outcomes in secondary progressive multiple sclerosis (SPMS). Using MSBase, an international cohort study, we previously validated a highly accurate definition of SPMS. Here, we identified patients in MSBase who were either untreated or treated with a disease-modifying drug when meeting this definition. Propensity score matching was used to select subpopulations with comparable baseline characteristics. Disability outcomes were compared in paired, pairwise-censored analyses adjusted for treatment persistence, visit density, and relapse rates. Of the 2,381 included patients, 1,378 patients were matchable (treated n = 689, untreated n = 689). Median pairwise-censored follow-up was 2.1 years (quartiles 1.2-3.8 years). No difference in the risk of 6-month sustained disability progression was observed between the groups (hazard ratio [HR] 0.9, 95% confidence interval [CI] 0.7-1.1, p = 0.27). We also did not find differences in any of the secondary endpoints: risk of reaching Expanded Disability Status Scale (EDSS) score ≥7 (HR 0.6, 95% CI 0.4-1.1, p = 0.10), sustained disability reduction (HR 1.0, 95% CI 0.8-1.3, p = 0.79), or change in disability burden (area under the EDSS-time curve, β = -0.05, p = 0.09). Secondary and sensitivity analyses confirmed the results. Our pooled analysis of the currently available disease-modifying agents used after conversion to SPMS suggests that, on average, these therapies have no substantial effect on relapse-unrelated disability outcomes measured by the EDSS up to 4 years. This study provides Class IV evidence that for patients with SPMS, disease-modifying treatment has no beneficial effect on short-term disability progression. YR 2017 FD 2017-08-09 LK http://hdl.handle.net/10668/11492 UL http://hdl.handle.net/10668/11492 LA en DS RISalud RD Mar 14, 2025