Qualitative Development of a Discrete Choice Experiment for Physical Activity Interventions to Improve Knee Osteoarthritis.
Daniel Pinto, Margaret K Danilovich, Paul Hansen and 5 others
PMID 28034720WHAT IT FOUND
People with knee pain weighed time, effort, cost, convenience, enjoyment, and health benefits when choosing physical activity.
Physical therapists can ask about these before prescribing activity, but this study did not test whether doing so improves outcomes.
Key findings
0141 adults with knee pain took part in five focus groups, and analysis yielded 27 attributes for physical activity choices.
02All but two attributes were related to non-health benefits or process attributes, such as convenience and effort.
03Eight adults completed the pilot choice task in less than 15 minutes, and the choice task was acceptable, but labels and instructions needed refinement.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The sample came from one senior center service provider in Chicago, so it may not represent adults with knee osteoarthritis elsewhere. Participants were community-dwelling adults with knee pain who could walk, so findings may not apply to homebound adults, nursing home residents, or younger working adults. Focus-group participants were mostly older and female, which may limit fit for younger or male patients. Only a small number of interviews were used to define attribute levels, so those levels may not reflect the whole group. This was work to build a survey, not a test of whether a physical activity program works or improves patient outcomes. The pilot found labels and instructions needed refinement.
Declared interests
The supplied text does not include an author conflict-of-interest declaration. The article is listed as supported by U.S. government Public Health Service research.
The easy way to misread this
Do not treat this as evidence that a discrete choice experiment or preference-based physical activity program improves knee osteoarthritis outcomes. It identified and pilot-tested survey attributes. It did not test an intervention or patient outcomes.