http://nnr.sagepub.com/content/29/6/517.full
A Randomized Controlled Multisite Trial
- Gyrd Thrane, MSc1,2
- Torunn Askim, PhD3,4
- Roland Stock, MSc5
- Bent Indredavik, MD, PhD5
- Ragna Gjone, MSc6
- Anne Erichsen, MSc7
- Audny Anke, MD, PhD1,2
- 1UiT The Arctic University of Norway, Tromsø, Norway
- 2University Hospital of North Norway, Tromsø, Norway
- 3Norwegian University of Science and Technology, Trondheim, Norway
- 4Sør-Trøndelag University College, Trondheim, Norway
- 5Trondheim University Hospital, Norway
- 6Vestfold Hospital Trust, Norway
- 7Oslo University Hospital, Norway
- Gyrd Thrane, MSc, Department of Health and Care Sciences, University of Tromsø, Faculty of Health Sciences, NO-9037 Tromsø, Norway. Email: gyrd.thrane@uit.no
Abstract
Background. There is limited evidence for
the effects of constraint-induced movement therapy (CIMT) in the early
stages of stroke recovery.
Objective. To evaluate the effect of a modified CIMT within 4 weeks poststroke.
Methods.
This single-blinded randomized multisite trial investigated the effects
of CIMT in 47 individuals who had experienced a
stroke in the preceding 26 days. Patients were
allocated to a CIMT or a usual care (control) group. The CIMT program
was 3
h/d over 10 consecutive working days, with mitt use
on the unaffected arm for up to 90% of waking hours. The follow-up time
was 6 months. The primary outcome was the Wolf
Motor Function test (WMFT) score. Secondary outcomes were the Fugl-Meyer
upper-extremity
motor score, Nine-Hole Peg test (NHPT) score, the
arm use ratio, and the Stroke Impact Scale. Analyses of covariance with
adjustment for baseline values were used to assess
differences between the groups. Results. After treatment, the
mean timed WMFT score was significantly better in the CIMT group
compared with the control group. Moreover,
posttreatment dexterity, as tested with the NHPT,
was significantly better in the CIMT group, whereas the other test
results
were similar in both the groups. At the 6-month
follow-up, the 2 groups showed no significant difference in arm
impairment,
function, or use in daily activities.
Conclusions. Despite a favorable effect of CIMT on timed movement measures immediately after treatment, significant effects were not
found after 6 months.
Introduction
Constraint-induced movement therapy (CIMT)
is designed to improve upper-extremity motor function after stroke and
consists
of 3 key components: (1) repetitive, task-oriented
training; (2) adherence-enhancing behavioral strategies (transfer
package);
and (3) constraining the use of the less-affected
arm, usually by wearing a mitt.1,2 The original protocol was developed for patients with chronic stroke and included 10 days of therapy for 6 h/d and constraining
the less-affected arm during 90% of the time awake.3
There is a critical window for neuroplasticity and ability to relearn impaired activities within the first weeks after stroke.4,5 Modified forms of CIMT have already been tested in the early stages of stroke rehabilitation (<10 weeks).5 In 2000, Dromerick et al6 published the results from a small-scale trial of 23 patients and reported that a 2-hour/10-day CIMT program was associated
with less arm impairment at the end of treatment. Another study of 23 patients by Boake et al7
reported trends favoring a 3-hour/10-day CIMT program over standard
therapy of equal duration. However, their only significant
finding was improved Fugl-Meyer assessment scores
immediately after treatment; no long-term effects were found. In the
VECTORS
study,8
3 groups of stroke patients received 10 days of treatment within 4
weeks after stroke. The low-intensity CIMT group (2 h/d,
6-hour constraint) had significantly better
improvement in the Action Research Arm test (ARAT), whereas the
high-intensity
CIMT group (3 h/d, 90% constraint) scored
significantly worse than the control group. Yet another modification of
CIMT was
reported by Page et al,9
who reported increased use of the affected arm and improved motor
impairment after 0.5 hours of training, 3 d/wk for 10 weeks
of CIMT in a sample of 10 patients. In summary, the
existing evidence on the effect of CIMT in the early stages of
rehabilitation
is limited to 5 trials that included 64 CIMT
patients and 41 controls.10 These 5 trials included at least 3 different protocols and reported wide confidence intervals and large variations in treatment
effects. Of particular concern are the negative results of the VECTORS trial.8 Because of the limited data and diversity of the results between previous trials, the effect of CIMT in the early stroke
rehabilitation is still uncertain.
The aim of the present study was to assess
the effect of a modified CIMT protocol in the early phase of
rehabilitation after
stroke. The primary hypothesis was that patients
who completed a modified CIMT protocol in the early phase after stroke
would
have better arm motor function measured with the
Wolf Motor Function test (WMFT) 6 months after the intervention compared
with patients who received the usual care. The
secondary aims were to evaluate the effect of CIMT on arm motor
impairment,
dexterity, arm use in daily activities, and overall
health status after stroke.
More at link.