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Gain and loss of abilities in type II SMA: A 12-month natural history study

Lookup NU author(s): Robert Muni Lofra, Dr Andres Nascimento Osorio


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© 2020 Elsevier B.V.The advent of clinical trials in spinal muscular atrophy (SMA) has highlighted the need to define patterns of progression using functional scales. It has recently been suggested that the analysis of abilities gained or lost applied to functional scales better reflects meaningful changes. We defined as “gain” a positive change between scores from 0 to either 1 or 2 and as “loss” a negative change from either 2 or 1 to 0. The aim of this study was to describe, over 12 months, which abilities on the Hammersmith Functional Motor Scale Expanded (HFMSE) were more frequently lost or gained in patients with SMA II. The cohort included 614 12-month assessments from 243 patients (age range: 30 months - 63 years; mean 9.94, SD ±7.91). The peak of abilities gained occurred before the age of 5 years while the highest number of lost abilities was found in the group 5–13 years. A correlation between the HFMSE baseline score and the ordinal number of the items was found for both lost (p<0.001) or gained (p<0.001) activities. No correlation was found with SMN2 copy number. These findings will have implications for clinical trial design and for the interpretation of real-world data using new therapeutic approaches.

Publication metadata

Author(s): Coratti G, Lucibello S, Pera MC, Duong T, Muni Lofra R, Civitello M, D'Amico A, Goemans N, Darras BT, Bruno C, Sansone VA, Day J, Nascimento Osorio A, Muntoni F, Montes J, Sframeli M, Finkel R, Mercuri E

Publication type: Article

Publication status: Published

Journal: Neuromuscular Disorders

Year: 2020

Volume: 30

Issue: 9

Pages: 765-771

Print publication date: 01/09/2020

Online publication date: 13/07/2020

Acceptance date: 08/07/2020

ISSN (print): 0960-8966

ISSN (electronic): 1873-2364

Publisher: Elsevier Ltd


DOI: 10.1016/j.nmd.2020.07.004

PubMed id: 32893082


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