Frequency of comorbid insomnia, pain, and depression in older adults with osteoarthritis: Predictors of enrollment in a randomized treatment trial

Participation in a group-format behavioral intervention for pain and insomnia was not related to participant clinical characteristics, but only to factors associated with ability to attend a daytime class (age and retirement status). We conclude that population-based recruitment yielded randomized trial participants who are clinically generalizable to the population of OA patients with significant pain and insomnia.