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Multiple sclerosis relapses: a multivariable analysis of residual disability determinants

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Abstract:

Vercellino M, Romagnolo A, Mattioda A, Masera S, Piacentino C, Merola A, Chiò A, Mutani R, Cavalla P. Multiple sclerosis relapses: a multivariable analysis of residual disability determinants.

Acta Neurol Scand 2009: 119: 126–130.

© 2008 The Authors Journal compilation © 2008 Blackwell Munksgaard. Background – 

Recovery from multiple sclerosis (MS) relapses is variable. The factors influencing persistence of residual disability (RD) after a relapse are still to be thoroughly elucidated. Aims of study – 

To assess RD after MS relapses and to define the factors associated with persistence of RD. Methods – 

Data were retrospectively collected for all relapses in a population of relapsing–remitting MS patients during 3 years. Relapse severity and RD after 1 year were calculated on Expanded Disability Status Scale basis. A multivariable analysis for factors influencing RD and relapse severity was performed (variables: age, gender, disease duration, oligoclonal bands, relapse severity, monosymptomatic/polysymptomatic relapse, immunomodulating treatment, incomplete recovery at 1 month). Results – 

A total of 174 relapses were assessed. RD after 1 year was observed in 54.5% of the relapses. Higher risk of RD was associated with occurrence of a severe relapse (P = 0.024). Incomplete recovery at 1 month was highly predictive of RD at 1 year (P < 0.0001). Risk of a severe relapse was associated with age ≤ 30 years (P = 0.025) and inversely associated with the use of immunomodulating treatment (P = 0.006). Conclusions – 

Incomplete recovery at 1 month is a predictor of long-term persistence of RD. Higher relapse severity is associated with higher risk of RD. Risk of severe relapses is lower in patients treated with immunomodulating drugs.

Keywords: Disability; multiple sclerosis; multivariable analysis; recovery; relapse; residual disability

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1600-0404.2008.01076.x

Publication date: February 1, 2009

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