title: Factors associated with the accuracy of self-reported osteoporosis in the community.
abstract: We examined the agreement between self-reported osteoporosis and bone mineral density (BMD) results through dual-energy x-ray absorptiometry (DXA) using data from a national representative sample taken from the US communities. Six-year data from the continuous National Health and Nutrition Examination Survey 2005-2006, 2007-2008, and 2009-2010 were merged. Participants included adults 50 years of age or older whose data appeared in both questionnaire and medical examination data files. Self-reported osteoporosis was defined by an affirmative response to a question in the osteoporosis questionnaire then compared with BMD-defined osteoporosis, defined by BMD values taken from the examination data. Agreement between self-reported osteoporosis and DXA results were low. Kappa was only 0.24 (95 % confidence interval = 0.21-0.27), and sensitivity and positive predictive value were 28.0 and 40.8 %, respectively. When stratified by gender or age group, agreement remained poor. Self-report of osteoporosis would not be suitable for accurate prevalence estimates for osteoporosis regardless of gender or age group.
authors.affiliation: The Center for Health Analytics and Discovery, Eastern Virginia Medical School, Harry Lester Building, 651 Colley Avenue, Norfolk, VA, 23507, USA. cunnintd@evms.edu.
authors.forename: Tina D
authors.initials: TD
authors.lastname: Cunningham
authors.affiliation: The Center for Health Analytics and Discovery, Eastern Virginia Medical School, Harry Lester Building, 651 Colley Avenue, Norfolk, VA, 23507, USA.
authors.forename: Sarah C
authors.initials: SC
authors.lastname: DeShields
mesh_terms: D015502:Absorptiometry, Photon; D000368:Aged; D015519:Bone Density / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000175:diagnosis / Q000453:epidemiology*; D015995:Prevalence; D057566:Self Report; D012680:Sensitivity and Specificity
keywords: Agreement; Bone density; Community survey; Osteoporosis; Sensitivity and specificity