ArticleJournal of neurology2026
HerMeS: a registry-based evaluation of the HERCULES criteria for identifying nonrelapsing SPMS.
Article in Journal of neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundSecondary progressive multiple sclerosis (SPMS) encompasses heterogeneous phenotypes that may or may not exhibit disease activity.
objectivesTo characterize a cohort of non-relapsing SPMS (nrSPMS) identified through a data-driven definition adapted from the HERCULES trial criteria, compared with neurologist-defined (ND) SPMS.
methodsRelapsing MS patients were retrospectively extracted from the Italian Multiple Sclerosis Register (RISM). ND was defined according to clinical criteria for SPMS and the HERCULES cohort adapting the trial inclusion criteria. Progression independent from relapse activity (PIRA) and relapse-associated worsening (RAW) events were assessed. Diagnostic performances of SPMS definitions were evaluated.
resultsAmong 20,306 patients, 866 (4.26%) were classified as SPMS by ND and 1603 (7.89%) by HERCULES criteria. The HERCULES group included older patients, less likely to relapse post-conversion. PIRA occurred in 88.8% of ND and 88.5% of HERCULES-defined cases, with a shorter median time to first PIRA in the latter. The HERCULES definition showed high specificity (93.4%) and low sensitivity (37.6%).
conclusionsHERCULES-adapted criteria identified a subgroup of 7.9% nrSPMS patients in the real-world cohort of RISM, characterized by fewer post-conversion relapses and earlier PIRA onset. These findings reinforce the value of applying standardized algorithmic definitions of SPMS in registry-based studies.
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