Playfully Assessing Lower Extremity Selective Voluntary Motor Control in Children With Cerebral Palsy: Psychometric Study.
Annina Fahr, Julia Balzer, Jeffrey W Keller and 1 others
PMID 36525299WHAT IT FOUND
A playful game using leg sensors could separate children with cerebral palsy from peers, but it did not match standard clinical scores well.
It may add detail, not replace usual assessment.
Key findings
01Children with cerebral palsy had worse leg selective movement control on the game than neurologically intact peers.
02The game did not match the SCALE or GMFCS well, but its involuntary movement score showed moderate agreement with a physiotherapist's rating.
03Total game scores were reasonably stable on repeat testing, but individual leg involuntary movement scores had wider uncertainty.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The sample was small: 20 children with CP were analysed, and 4 of 24 who consented could not complete the game because of cognitive understanding or visual impairment. The study used convenience sampling from one rehabilitation centre. There is no accepted gold standard for selective voluntary motor control, so validity had to be judged against imperfect comparators. The game did not correlate well with the SCALE or GMFCS, so its relationship with current clinical measures is unclear. Three of 20 children did not have a second measurement, and the repeat testing intervals varied. The game requires cognitive understanding and at least 10 degrees active range of motion; ankle contractures led to missing ankle data. Engagement with the game varied and may have affected scores. Absolute reliability was less reassuring: the minimal detectable change was 25% to 99% of the average patient score. The setup is time consuming and not yet practical for routine use.
The easy way to misread this
Do not treat the game as a replacement for the SCALE or as proof it can detect treatment change. It separated children with CP from peers, but it did not match standard clinical scores well, and the paper says responsiveness still needs future study.