Key result
Fatigue was a consistent predictor of lowered physical activity among older adults with knee osteoarthritis (β = −20.83, p < .001), regardless of actigraph location.
Why the study?
Fatigue is common in osteoarthritis and predicts worse functioning and decreased activity, but its relationship with subsequent physical activity required examination using accelerometry and experience sampling.
Do momentary reports of fatigue predict subsequent physical activity levels in older adults with knee osteoarthritis?
Observational (n=201)
Do momentary reports of fatigue predict subsequent physical activity levels in older adults with knee osteoarthritis?
Fatigue is a consistent predictor of lowered physical activity in older adults with knee osteoarthritis, regardless of whether activity is measured via wrist or waist actigraphy.
Fatigue may identify at-risk knee osteoarthritis patients; this Level 3 cohort study leaves open causal effects and intervention trials.
Objective: Fatigue is commonly reported by persons with osteoarthritis (OA) and predicts worse functioning and decreased activity. The current research used a combination of wrist and waist accelerometry along with experience sampling methodology to examine the relationship between reports of fatigue and subsequent physical activity among older adults with knee OA. Method: Two hundred one participants completed an interview followed by a 1-week period during which their activity was monitored and they reported symptoms of pain and fatigue. Multilevel models examined within-subjects versus between-subjects patterns of symptoms and their association with physical activity. Results: Fatigue was the most consistent predictor of lowered physical activity (β = −20.83, p < .001). Although wrist-worn actigraphs produced higher averaged activity counts than did waist actigraphs ( t = 34.68, p < .001), multilevel models showed consistent results regardless of placement. Discussion: Fatigue was a consistent predictor of lowered activity regardless of actigraph location.
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Smith et al. (2019) conducted an observational in Knee osteoarthritis (n=201). Fatigue was evaluated on Physical activity level (β = -20.83, p=< .001). Fatigue was a consistent predictor of lowered physical activity among older adults with knee osteoarthritis (β = −20.83, p < .001), regardless of actigraph location.
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