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Very Early Constraint-Induced Movement during Stroke Rehabilitation (VECTORS): A single-center RCT.
A W Dromerick1, C E Lang, R L Birkenmeier
1Department of Rehabilitation Medicine, Georgetown University and National Rehabilitation Hospital, Washington, DC, USA. Alexander.w.dromerick@medstar.net
Neurology
|May 22, 2009
Summary
Constraint-induced movement therapy (CIMT) showed equal effectiveness to traditional therapy for upper extremity (UE) motor recovery post-stroke. However, high-intensity CIMT led to less improvement, suggesting an inverse dose-response relationship in early stroke rehabilitation.
Area of Science:
- Neurorehabilitation
- Stroke recovery
- Motor function restoration
Background:
- Constraint-induced movement therapy (CIMT) is a leading approach for upper extremity (UE) motor recovery after stroke.
- The optimal intensity and timing of CIMT during acute inpatient rehabilitation remain under investigation.
Purpose of the Study:
- To compare the efficacy of dose-matched and high-intensity CIMT versus traditional therapy for UE motor recovery in acute stroke patients.
- To investigate the dose-response relationship of CIMT intensity in early stroke rehabilitation.
Main Methods:
- The Very Early Constraint-Induced Movement during Stroke Rehabilitation (VECTORS) trial was a single-blind, phase II study.
- Participants received 2 weeks of either dose-matched CIMT, high-intensity CIMT, or traditional UE therapy.
- The primary outcome was the Action Research Arm Test (ARAT) score at 90 days post-stroke, analyzed using a mixed-effects model.
Main Results:
- A total of 52 participants were randomized early after stroke onset (mean 9.65 days).
- High-intensity CIMT showed significantly less motor improvement at 90 days compared to other groups (p < 0.01).
- No significant differences in motor improvement were observed between dose-matched CIMT and traditional therapy groups.
Conclusions:
- During acute inpatient stroke rehabilitation, CIMT is not superior to an equal dose of traditional therapy for UE motor recovery.
- Higher intensity CIMT demonstrated an inverse dose-response effect, leading to reduced motor gains at 90 days.
- Motor intervention studies should carefully consider and control for treatment dose, as higher doses are not always more beneficial, especially early post-stroke.