Intramuscular interferon beta-1a therapy in patients with relapsing-remitting multiple sclerosis: A 15-year follow-up study

R. A. Bermel, B. Weinstock-Guttman, D. Bourdette, P. Foulds, X. You, R. A. Rudick

Research output: Contribution to journalArticle

63 Scopus citations

Abstract

Disease-modifying drugs are initiated early and continued for years in patients with multiple sclerosis. Long-term tolerability and impact are not known. The objective of this study was to evaluate long-term tolerability of intramuscular interferon beta-1a and effects on disability and quality of life. Patients were evaluated an average of 15 years after randomization into a placebo-controlled, double-blind trial of intramuscular interferon beta-1a for relapsing multiple sclerosis. Patient-reported Expanded Disability Status Scale, the Short Form-36, a visual analog scale of self-care independence, and a living situation questionnaire were administered. Status was ascertained in 79% (136/172) of eligible patients. Analysis focused on 122 living patients. Despite open-label, non-standardized treatment after the 2-year clinical trial, 46% (n= 56) of the patients remained on intramuscular interferon beta-1a. Expanded Disability Status Scale scores were correlated highly with Short Form-36 subcategories and visual analog scale scores. Patients currently using intramuscular interferon beta-1a had a significantly lower mean Expanded Disability Status Scale score (p= 0.011), less progression to Expanded Disability Status Scale milestones, significantly better scores on the physical component of the Short Form-36 (p< 0.0001), and reported better general health and greater independence. We conclude that patients continuing to use intramuscular interferon beta-1a had less disability and better quality of life compared with patients not currently using intramuscular interferon beta-1a 15 years after randomization into a clinical trial.

Original languageEnglish (US)
Pages (from-to)588-596
Number of pages9
JournalMultiple Sclerosis
Volume16
Issue number5
DOIs
StatePublished - May 1 2010

Keywords

  • Disease-modifying therapy
  • EDSS
  • Interferon beta-1a
  • Long-term
  • Multiple sclerosis
  • Quality of life
  • SF-36

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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