• Pain Med · Aug 2014

    Correlates of gait speed in advanced knee osteoarthritis.

    • Zachary A Marcum, Hanzi Lena Zhan, Subashan Perera, Charity G Moore, G Kelley Fitzgerald, and Debra K Weiner.
    • Department of Medicine (Geriatrics), University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
    • Pain Med. 2014 Aug 1;15(8):1334-42.

    ObjectiveThis study aims to evaluate correlates of gait speed, a measure of disability, in older adults with advanced knee osteoarthritis (OA) and chronic pain.Design/Setting/Subjects/MethodsBaseline data were analyzed from a clinical trial of 190 participants aged >50 with advanced knee OA (according to clinical and radiographic American College of Rheumatology criteria) and chronic pain. Data included 4-meter gait speed, quality of life (Short Form Health Survey 36 global health subscale), knee pain (Western Ontario and McMasters Universities Osteoarthritis Index [WOMAC]), depressive symptoms (Center for Epidemiologic Studies Depression Scale), coping strategies (catastrophizing subscale and Cognitive Strategies Questionnaire), self-efficacy (Athritis Self-efficacy Scale [ASES]), comorbidity (Cumulative Illness Rating Scale), analgesic use, and pain comorbidities (location, frequency, and intensity). A multivariable regression model was used to investigate these variables as they relate to gait speed.ResultsIn the univariate analysis, the following variables were associated with gait speed: knee pain (per WOMAC), age, depressive symptoms, global health, catastrophizing, ASES function and other, comorbidity, and opioid use (all P values <0.05). In the fully adjusted multivariate model, controlling for knee pain, significant associations between gait speed and age (β = -0.006; P < 0.001), ASES function (β = 0.003; P < 0.001), and opioid use (β = -0.082; P = 0.009) persisted. The correlation between opioid dose and gait speed (among opioid users) was not statistically significant (r = 0.04; P = 0.81).ConclusionIn a cross-sectional study of older adults with advanced knee OA and chronic pain, we found that age, arthritis function self-efficacy, and opioid use (but not dose) were significantly associated with decreased gait speed.Wiley Periodicals, Inc.

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