Using accelerometry for measurement of motor behavior in children: Relationship of real-world movement to standardized evaluation.
Catherine R Hoyt, Shelby K Brown, Sarah K Sherman and 7 others
PMID 31783278WHAT IT FOUND
Wrist accelerometers can objectively measure how much children with hemiparesis use their affected arm in daily life.
The movement data correlated moderately with clinical test scores, suggesting this affordable tool can help screen for asymmetry and guide therapy intensity.
Key findings
01Children with hemiparesis showed significantly lower use of their non-dominant arm compared to typically developing peers, as measured by accelerometry.
02Real-world unilateral movement (MAUI) correlated moderately with clinical scores for dexterity and fluency, indicating it reflects functional capacity.
03Some children with a hemiparesis diagnosis had movement patterns similar to typically developing peers, correlating with high clinical scores and milder impairment.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study had a small sample size of 52 children. The wide age range (1.9 to 16.4 years) means developmental stage could influence the relationship between accelerometry and clinical scores. Caregivers chose when to wear the devices, so some children wore them only on weekdays or weekends, which may affect movement patterns. The participant group was predominantly white and from higher socioeconomic backgrounds, limiting generalizability. Accelerometers measure wrist movement and do not directly capture fine hand movements, which may explain why correlations with dexterity were moderate rather than strong.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not assume accelerometry replaces clinical assessment. The correlations were moderate, indicating the devices measure a related but not identical construct to the MA-2. It is a screening tool for asymmetry, not a diagnostic replacement for evaluating movement quality.