Using Compositional Data Analysis to Explore Movement Behaviors in People Who Have Experienced a Stroke.
George D Fulk, Karen J Klingman, Sandra A Billinger and 6 others
PMID 42226084WHAT IT FOUND
Stroke survivors' daily mix of activity, sedentary time, and sleep was associated with physical function.
The whole-day pattern related to function more closely than each behavior considered separately.
Key findings
01The composition of active, sedentary, and nighttime sleep behaviors was associated with SIS-16 physical function.
02The compositional model explained more of the variation in SIS-16 physical function scores than the model that analyzed the behaviors separately.
03Participants spent an average of 105.7 minutes in active behavior, 836.1 minutes in sedentary behavior, and 498.2 minutes in nighttime sleep per day.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The analysis was cross-sectional, so it reported an association rather than the effect of changing movement behaviors. Most participants were still receiving rehabilitation while wearing the monitors, so their daily movement may not reflect stroke survivors who are not in therapy. Only nighttime sleep was measured as sleep; daytime naps were counted as sedentary time. Sleep was estimated from movement with actigraphy, which can carry error. Only 68 participants had full-day monitor data, and they were recruited from inpatient rehabilitation hospitals in the United States.
Declared interests
The authors declared no conflict of interest.
The easy way to misread this
Do not read this as evidence that increasing active time or reducing sedentary time will improve physical function. The study measured an association at one time point and did not test a behavior change intervention.