Relationship of Meeting Physical Activity Guidelines With Health-Related Utility

Arthritis care & research 07/2014; 66(7). DOI: 10.1002/acr.22262
Source: PubMed

ABSTRACT Objective: Health-related utility measures overall health status and quality of life and is commonly incorporated into cost-effectiveness analyses. This study investigates whether attainment of federal physical activity guidelines translates into better health-related utility in adults with or at risk for knee osteoarthritis (OA). Methods: Cross-sectional data from 1908 adults with or at risk for knee OA participating in the accelerometer ancillary study of the Osteoarthritis Initiative (OAI) were assessed. Physical activity was measured using 7 days of accelerometer monitoring and was classified as 1) Meeting Guidelines (≥150 bouted moderate-to-vigorous [MV] minutes per week); 2) Insufficiently Active (≥1 MV bout[s] per week but below guidelines); or 3) Inactive (zero MV bouts per week). A Short Form 6D (SF6-D) health-related utility score was derived from patient-reported health status. Relationship of physical activity levels to median health-related utility adjusted for socioeconomic and health factors was tested using quantile regression. Results: Only 13% of participants met physical activity guidelines; 45% were inactive. Relative to the Inactive, median health-related utility scores were significantly greater for the Meeting Guidelines (0.063; confidence interval [CI] 0.055-0.071) and Insufficiently Active (0.059; CI 0.054-0.064) groups. These differences showed a statistically significant linear trend and strong cross-sectional relationship with physical activity level even after adjusting for socioeconomic and health factors. Conclusions: We found a significant positive relationship between physical activity level and health-related utility. Interventions that encourage adults, including persons with knee OA, to increase physical activity even if recommended levels are not attained may improve their quality of life. © 2013 American College of Rheumatology.

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