Journal
JAMA NEUROLOGY
Volume 70, Issue 2, Pages 214-222Publisher
AMER MEDICAL ASSOC
DOI: 10.1001/jamaneurol.2013.599
Keywords
-
Categories
Funding
- Italian Multiple Sclerosis Foundation (FISM)
- German Ministry for Education and Research (BMBF)
- European Committee for Treatment and Research in Multiple Sclerosis
- European Union Seventh Framework Programme
- BMBF
- Budeswirtschaftsministerium (Germany Ministry for Economic Affairs)
- Hertie Foundation
- American Academy of Neurology Foundation/Consortium of Multiple Sclerosis Centers John F. Kurtzke Clinician-Scientist award, a Goodger Scholarship (University of Oxford)
- National Institute for Health Research Biomedical Research Centre, Oxford
- Medical Research Council UK
- UK Multiple Sclerosis Society/UK Stem Cell Foundation
- FISM [2008/R/16]
- Bayer Schering Pharma
- Sanofi-Aventis
- Roche
- UCB
- Multiple Sclerosis Society of the United Kingdom
- Multiple Sclerosis Society of Canada Scientific Research Foundation
- Medical Research Council [G0800679]
- MS Society of Canada
- UK MS Society
- BMBF/German Competence Network [01GI0904, 01GI0920]
- MRC [G0800679] Funding Source: UKRI
- Medical Research Council [G0800679] Funding Source: researchfish
Ask authors/readers for more resources
Objectives: To investigate the relationship among attacks in the first 2 years (early relapses), secondary progression (SP), and late disability in multiple sclerosis (MS). Design: Cohort study with follow-up of 28 years. Setting: Referral MS center. Patients: Patients (N = 730) with relapsing-remitting MS diagnosed according to Poser criteria, from the database of the London Multiple Sclerosis Clinic, London, Ontario, Canada. Main Outcome Measure: Long-term evolution of patients with high (>= 3 attacks) and early (within the first 2 years of the disease) frequency of relapses. In the total SP population and in patients grouped by numbers of early relapses, we assessed the predictive effect of latency to progression (time to SP) on times to attain cane requirement (Disability Status Scale score of 6 [DSS 6]) and bed-ridden status (DSS 8). Results: Among the group with frequent early relapses (n = 158), outcomes were variable. Although 103 (65.2%) experienced rapid conversion to SP MS (median duration, 5 years) and rapidly attained DSS 6 and DSS 8 scores (7 and 17 years, respectively), the remainder (n = 55) did not enter the SP phase, despite adverse early relapse features. Among the total SP population, longer latency to progression was associated with lower probability of attaining DSS 6 (odds ratio, 0.76 [95% CI, 0.69-0.84] and 0.44 [95% CI, 0.37-0.52] for 5- and 15-year latency, respectively) and longer times to severe disability. The same association between time to onset of SP and late outcomes was observed even in patients matched by number of early attacks. However, duration of the relapsing-remitting phase did not influence the times from SP onset to DSS levels. Conclusions: Our results indicate dissociation between early inflammatory attacks and onset of the SP phase and further question the validity of relapse frequency as a surrogate marker for late disability. Among the group with frequent early relapses, we observed a large variability of outcomes, ranging from one extreme to the opposite. JAMA Neurol. 2013;70(2):214-222. Published online November 19, 2012. doi:10.1001/jamaneurol.2013.599
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available