Accuracy in the Estimation of Self-Reported Knee Brace Wear Time in Young Adults With a Symptomatic Knee Following ACL Reconstruction: Secondary Analysis of a Pilot Randomized Controlled Trial.
Matthew Savage, Benjamin F Mentiplay, Harriette Slater and 5 others
PMID 42202269WHAT IT FOUND
Self-reported knee brace wear time varied widely from sensor data day-to-day, with differences up to 3.5 hours.
However, averaging self-reports over the entire 6-week period or using 7-day rolling averages significantly improved accuracy compared to daily logs.
Key findings
01Daily self-reported wear time showed wide limits of agreement with sensor data, potentially differing by up to 3.5 hours per day.
02Participants tended to overreport the number of days they wore the brace, with 90% overreporting compared to sensor data.
03Averaging self-reported wear time across the entire intervention period resulted in excellent agreement with sensor data, smoothing out day-to-day errors.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The analysis included only 10 participants, making the results preliminary and hypothesis-generating. The temperature sensor was not specifically validated for knee braces, so factors like skin contact or sweating could affect accuracy. Environmental factors like entering a hot car or air-conditioned room could have influenced the temperature readings used to detect brace wear. Two participants failed to complete their daily logs, highlighting the difficulty of relying on self-reported data.
Declared interests
None declared. Funding was provided by university scholarships and a National Health and Medical Research Council grant, with no role for funders in the study design or manuscript preparation.
The easy way to misread this
Do not assume the temperature sensor data is a perfect gold standard, as it was not validated for knee braces and could be influenced by environmental temperature changes. The findings are based on a very small sample of 10 people and should be viewed as preliminary evidence that daily self-reports are inaccurate, rather than definitive proof of sensor reliability.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →