Development and evaluation of the sedentary behavior and light-intensity physical activity questionnaire.
Rumi Tanaka, Kimie Fujita, Kiyoko Makimoto and 6 others
PMID 33642686WHAT IT FOUND
For patients with hip or knee replacements who mostly do light activity, this new 10-item questionnaire tracks light-intensity activity fairly well but poorly captures sedentary time.
Use it to measure how much people move, not how much they sit.
Key findings
01The questionnaire showed good test-retest reliability for both light-intensity activity and sedentary behavior, but validity against an accelerometer was moderate for light activity and low for sedentary behavior.
02Bland-Altman analysis showed no overall bias, but proportional biases were present, indicating the questionnaire reported higher activity times than the accelerometer.
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 population was restricted to patients with hip or knee replacements, so results may not generalize to other inactive older adults. Sedentary behavior items showed low validity against the accelerometer. Proportional bias suggests the questionnaire may overestimate activity duration compared to objective measures. Floor effects were present for several items, indicating many participants reported zero time for those activities.
Declared interests
There are no conflicts of interest to declare.
The easy way to misread this
Do not assume the questionnaire accurately measures how much time patients spend sitting or lying down. It showed only low correlation with accelerometer data for sedentary behavior, so use it for light-intensity activity tracking only.