کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9880229 | 1535221 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Prospective assessment of changing from placebo to IFN beta-1a in relapsing MS: The PRISMS study
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
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چکیده انگلیسی
The efficacy of interferon (IFN) beta has been shown in several placebo-controlled, parallel-group studies in relapsing-remitting multiple sclerosis (RRMS). PRISMS, the largest such study to date, clearly demonstrated the efficacy of IFN beta-1a on all outcome measures over 2 years during the placebo-controlled, parallel-group phase. However, this study's placebo-crossover design also provided us with a unique opportunity to conduct a prospective within-group assessment, eliminating the impact of inter-patient variability. At the start of year 3, patients receiving placebo during years 1-2 were re-randomized in a dose-blinded fashion to receive IFN beta-1a, 22 or 44 mcg subcutaneously three times weekly, during years 3 and 4. Clinic visits occurred 3-6 monthly and T2 MRI scans were obtained after 1 and 2 years on therapy. Comparison of the mean relapse count per patient over 2 years (the primary outcome measure) during time on placebo (years 1 and 2) with that during active treatment (years 3 and 4) revealed a decrease from 2.6 to 1.2 in both dose groups (54% relative reduction; p < 0.001). Disability progression, T2 MRI lesion activity and accumulation of T2 lesion burden were also significantly improved with therapy (p < 0.01). No new safety issues were noted. These data provide further support for IFN beta-1a's efficacy in RRMS. The ability to detect significant treatment effects with reduced patient numbers in this type of before/after analysis, may be due to the reduction in inter-patient variability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Neurological Sciences - Volume 237, Issues 1â2, 15 October 2005, Pages 45-52
Journal: Journal of the Neurological Sciences - Volume 237, Issues 1â2, 15 October 2005, Pages 45-52
نویسندگان
J. Oger, G. Francis, P. Chang, On behalf of the PRISMS Study Group On behalf of the PRISMS Study Group,