Cumulative effects of long-term treatment with abobotulinumtoxinA in cervical dystonia: Findings from a prospective, observational study.
File(s)
Published version
OA Location
Author(s)
Type
Journal Article
Abstract
OBJECTIVE: Patients with cervical dystonia (CD) require regular injections of botulinum neurotoxin type A (BoNT-A) to maintain treatment effectiveness. In this secondary analysis of a large routine-practice study, we assessed the response to abobotulinumtoxinA over repeated cycles and compared the responses of patients previously naïve to BoNT treatment to those already treated with BoNT-A. METHODS: INTEREST IN CD2 was a prospective, 3-year, observational study following CD patients treated with BoNT-A. Patients were assessed at each injection visit using the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) and Tsui scale; patient satisfaction with symptom control (previous cycle) was recorded. RESULTS: This analysis included 466 patients treated with abobotulinumtoxinA over 3 years. TWSTRS-Total scores continually decreased; the mean ± SD reduction from baseline to 36 months was -7.4 ± 11.9. BoNT-naïve patients tended to show greater reductions in TWSTRS scores than already treated patients, particularly in the first 6 months. Incremental improvements were also seen in Tsui-tremor scores. Overall levels of patient satisfaction at peak effect (84.1-91.2%) were consistently higher than at the end of cycle (47.2-53.2%). The most frequently reported adverse events were dysphagia (6.8%) and muscular weakness (3.7%). CONCLUSIONS: These data support the long-term effectiveness and safety of abobotulinumtoxinA in a real-world setting.
Date Issued
2020-07-09
Date Acceptance
2020-07-05
Start Page
117015
Journal / Book Title
J Neurol Sci
Volume
416
Copyright Statement
© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/32682125
S0022-510X(20)30352-X
Subjects
AbobotulinumtoxinA
Botulinum toxin
Cervical dystonia
Dysport
Observational study
INTEREST IN CD2 study group
1103 Clinical Sciences
1109 Neurosciences
1701 Psychology
Publication Status
Published online
Coverage Spatial
Netherlands