Revision of the Facts on Osteoporosis Quiz.

Abstract

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. The goal was to update the original instrument based on the latest scientific evidence and to determine its psychometric properties. 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. 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. The revised version of the FOOQ provides a valid, reliable, and theoretically informed instrument with acceptable psychometric properties.