Comparative effects of EMG-driven robot-assisted therapy versus task-oriented training on motor and daily function in patients with stroke: a randomized cross-over trial.
Yen-Wei Chen, Wei-Chi Chiang, Chia-Ling Chang and 2 others
PMID 35034664WHAT IT FOUND
Both robot-assisted hand therapy and task-oriented training improved upper limb function in chronic stroke.
Robot therapy was better for speed of task completion; task-oriented training was better for spontaneous arm use in daily life.
Key findings
01Robot-assisted therapy significantly improved task completion time (WMFT-Time, p = .004), while task-oriented training did not (p = .21). Conversely, task-oriented training significantly increased spontaneous arm use in daily activities (MAL-AOU, p = .014), while robot-assisted therapy did not (p = .57).
02For body function (FMA-UE), the effect depended on order: the robot-first group improved after both interventions (p = .031 and .013), while the task-first group improved only after task-oriented training (p = .018) and not after robot-assisted therapy (p = .816).
03For functional ability (WMFT-FAS) and upper limb performance (ARAT), both interventions produced significant improvements with no significant difference between them (p = .12 and p = .87 respectively).
STILL TO COME
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What it does not show
Seven of the 31 participants dropped out during the first period, leaving only 14 in one group and 10 in the other, which limits how much weight to put on group comparisons. The two groups differed in age (mean 54.6 vs 65.0 years, p = .02), though the authors note baseline impairment levels were similar. Participants were allowed to practice upper limb movements during the 1-month washout, so some carryover of skills is possible despite the statistical test showing none. Only one specific robot (the Hand of Hope exoskeleton) was tested, so results may not generalise to other devices. The outcome scales are ordinal (whole-number scores), which may miss small but meaningful changes in motor performance.
Declared interests
Funded by Chang Gung Memorial Hospital. No other conflicts of interest are declared in the text provided.
The easy way to misread this
Do not read this as proof that robot-assisted therapy is superior to task-oriented training. The two interventions were better in different domains: robot therapy improved task speed, task-oriented training improved spontaneous arm use. For body function, the result depended on which intervention came first, not on which one was better.
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