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Revision of the Facts on Osteoporosis Quiz
Rita L Ailinger1, Howard Lasus, Mary Ann Braun
1Health and Wellness Center, George Mason University, Fairfax, Virginia 22030-4444, USA. railinge@gmu.edu
Background:
Few instruments exist that measure knowledge of osteoporosis, a health risk for 28 million Americans. The original Facts on Osteoporosis Quiz (FOOQ), which was theoretically informed by Orem's (1995) Self-Care Theory, was published in 1998. In 2000, the National Institutes of Health (NIH) held a consensus conference on osteoporosis in which previous knowledge was modified based on current science.
Objectives:
The goal was to update the original instrument based on the latest scientific evidence and to determine its psychometric properties.
Method:
The quiz content was validated by osteoporosis experts and is theoretically informed by Orem's (2001) Self-Care Theory. An iterative process was used to design an instrument with an acceptable reading level. Reliability, item discrimination, and item difficulty were assessed in a convenience sample of 256 participants.
Results:
The revised quiz, content-based on the 2000 NIH osteoporosis consensus conference, includes 20 questions. The quiz has a content validity index of.87, an internal consistency reliability of.76 and a 6th grade reading level. Item difficulty and item discrimination are also reported.
Conclusions:
The revised version of the FOOQ provides a valid, reliable, and theoretically informed instrument with acceptable psychometric properties.