Volume 89, Issue 5 pp. 1011-1022
Research Article

Early Predictors of 9-Year Disability in Pediatric Multiple Sclerosis

Ermelinda De Meo MD

Ermelinda De Meo MD

Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy

Vita-Salute San Raffaele University, Milan, Italy

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Raffaello Bonacchi MD

Raffaello Bonacchi MD

Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Lucia Moiola MD

Lucia Moiola MD

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Bruno Colombo MD

Bruno Colombo MD

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Francesca Sangalli MD

Francesca Sangalli MD

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Chiara Zanetta MD

Chiara Zanetta MD

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Maria Pia Amato MD

Maria Pia Amato MD

Department NEUROFARBA, Section of Neurosciences, University of Florence, Florence, Italy

IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy

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Vittorio Martinelli MD

Vittorio Martinelli MD

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Maria Assunta Rocca MD

Maria Assunta Rocca MD

Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy

Vita-Salute San Raffaele University, Milan, Italy

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

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Massimo Filippi MD

Corresponding Author

Massimo Filippi MD

Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy

Vita-Salute San Raffaele University, Milan, Italy

Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

Neurorehabilitation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy

Neurophysiology Service, IRCCS San Raffaele Scientific Institute, Milan, Italy

Address correspondence to Prof Massimo Filippi, Full Professor of Neurology, Vita-Salute San Raffaele University, Chair, Neurology Unit, Chair, Neurorehabilitation Unit, Director, Neurophysiology Service, Director, MS Center, Director, Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Via Olgettina, 60, 20132 Milan, Italy. E-mail: [email protected]

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First published: 17 February 2021
Citations: 22

Abstract

Objective

The purpose of this study was to assess early predictors of 9-year disability in pediatric patients with multiple sclerosis.

Methods

Clinical and magnetic resonance imaging (MRI) assessments of 123 pediatric patients with multiple sclerosis were obtained at disease onset and after 1 and 2 years. A 9-year clinical follow-up was also performed. Cox proportional hazard and multivariable regression models were used to assess independent predictors of time to first relapse and 9-year outcomes.

Results

Time to first relapse was predicted by optic nerve lesions (hazard ratio [HR] = 2.10, p = 0.02) and high-efficacy treatment exposure (HR = 0.31, p = 0.005). Predictors of annualized relapse rate were: at baseline, presence of cerebellar (β = −0.15, p < 0.001), cervical cord lesions (β = 0.16, p = 0.003), and high-efficacy treatment exposure (β = −0.14, p = 0.01); considering also 1-year variables, number of relapses (β = 0.14, p = 0.002), and the previous baseline predictors; considering 2-year variables, time to first relapse (2-year: β = −0.12, p = 0.01) entered, whereas high-efficacy treatment exposure exited the model. Predictors of 9-year disability worsening were: at baseline, presence of optic nerve lesions (odds ratio [OR] = 6.45, p = 0.01); considering 1-year and 2-year variables, Expanded Disability Status Scale (EDSS) changes (1-year: OR = 26.05, p < 0.001; 2-year: OR = 16.38, p = 0.02), and ≥ 2 new T2-lesions in 2 years (2-year: OR = 4.91, p = 0.02). Predictors of higher 9-year EDSS score were: at baseline, EDSS score (β = 0.58, p < 0.001), presence of brainstem lesions (β = 0.31, p = 0.04), and number of cervical cord lesions (β = 0.22, p = 0.05); considering 1-year and 2-year variables, EDSS changes (1-year: β = 0.79, p < 0.001; 2-year: β = 0.55, p < 0.001), and ≥ 2 new T2-lesions (1-year: β = 0.28, p = 0.03; 2-year: β = 0.35, p = 0.01).

Interpretation

A complete baseline MRI assessment and an accurate clinical and MRI monitoring during the first 2 years of disease contribute to predict 9-year prognosis in pediatric patients with multiple sclerosis. ANN NEUROL 2021;89:1011–1022

Potential Conflicts of Interests

Nothing to report.

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