Minimal evidence of disease activity (MEDA) in relapsing-remitting multiple sclerosis.
J Neurol Neurosurg Psychiatry
; 91(3): 271-277, 2020 03.
Article
em En
| MEDLINE
| ID: mdl-31974130
ABSTRACT
OBJECTIVE:
This study aimed to define the minimal evidence of disease activity (MEDA) during treatment that can be tolerated without exposing patients with relapsing-remitting multiple sclerosis at risk of long-term disability.METHODS:
We retrospectively collected data of patients followed up to 10 years after starting interferon beta or glatiramer acetate. Survival analyses explored the association between the long-term risk of reaching an Expanded Disability Status Scale≥6.0 and early clinical and MRI activity assessed after the first and second year of treatment. Early disease activity was classified by the so-called 'MAGNIMS score' (low no relapses and <3 new T2 lesions; medium no relapses and ≥3 new T2 lesions or 1 relapse and 0-2 new T2 lesions; high 1 relapse and ≥3 new T2 lesions or ≥2 relapses) and the absence or presence of contrast-enhancing lesions (CELs).RESULTS:
At follow-up, 148/1036 (14.3%) patients reached theoutcome:
61/685 (8.9%) with low score (reference category), 57/241 (23.7%) with medium score (HR=1.94, p=0.002) and 30/110 (27.3%) with high score (HR=2.47, p<0.001) after the first year of treatment. In the low score subgroup, the risk was further reduced in the absence (49/607, 8.1%) than in the presence of CELs (12/78, 15.4%; HR=2.11, p=0.01). No evident disease activity and low score in the absence of CELs shared the same risk (p=0.54). Similar findings were obtained even after the second year of treatment.CONCLUSIONS:
Early marginal MRI activity of one to two new T2 lesions, in the absence of both relapses and CELs, is associated with a minor risk of future disability, thus representing a simple and valuable definition for MEDA.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Esclerose Múltipla Recidivante-Remitente
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article