by Joseph Jankovic, MD, Alberto Esquenazi, MD, Darcy Fehlings, MD, Fred Freitag, DO, Amy M. Lang, MD, Marcus Naumann, MD.
Parkinson’s Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, TX, USA.
This review systematically examines the effects of botulinum toxin type A (BTX-A) on patient-reported outcomes across disorders using evidence-based criteria. The evidence provided by these studies ranged from randomized, controlled trials to case series. The effects of BTX-A on quality of life or global treatment outcomes were assessed in 48 studies across 16 different conditions. All but 7 of these reported benefits of BTX-A over baseline or the comparator condition (placebo or other treatment). The effects of BTX-A on impairment, activities, or participation were assessed in 46 studies across 17 different conditions. All but 4 reported benefits of BTX-A over baseline or the comparison group. The effects of BTX-A on satisfaction or preference were assessed in 14 studies across 11 different conditions, all of which reported high rates of satisfaction with BTX-A or preference over the comparator. These studies provide evidence that BTX-A exerts meaningful benefits on the quality of life of patients treated with this biologic agent.
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