Σφακιανάκης Αλέξανδρος
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Τρίτη 27 Δεκεμβρίου 2016

Qualitative Development of a Discrete Choice Experiment for Physical Activity Interventions to Improve Knee Osteoarthritis

Publication date: Available online 27 December 2016
Source:Archives of Physical Medicine and Rehabilitation
Author(s): Daniel Pinto, Margaret Danilovich, Paul Hansen, Daniel J. Finn, Rowland W. Chang, Jane L. Holl, Allen W. Heinemann, Ulf Bockenholt
ObjectiveTo describe the qualitative process used to develop attributes and attribute levels for inclusion in a discrete choice experiments (DCE) for older adult physical activity interventions.DesignFive focus groups (a total of 41 participants) were conducted, grounded in the Health Action Process Approach framework. Discussion emphasized identification and prioritization attributes for a DCE on physical activity. Semi-structured interviews (n=6) investigated attribute levels and lay-language for the DCE. A focus group with physical activity researchers and health care providers was the final stakeholder group used to establish a comprehensive approach for the generation of attributes and levels. A DCE pilot test was then conducted with individuals of the target patient population. All transcripts were analyzed using a constant comparative approach.SettingGeneral community and university-based research settingParticipantsVolunteers with age greater than 45 years and knee pain, aches or stiffness for at least one month over the previous 12 months.InterventionsNot applicable.Main outcome measuresInterview guides, attributes, attribute levels, discrete choice experiment.ResultsThe most influential identified attributes for physical activity were time, effort, cost, convenience, enjoyment, and health benefits. Each attribute had three levels that were understandable in the pilot test of the DCE.ConclusionsThe identification of six physical activity attributes that are most salient to adults with knee osteoarthritis resulted from a systematic qualitative process including attribute-ranking exercises. A DCE will provide insight into the relative importance of these attributes for participating in physical activity, which can guide intervention development.



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