title: Validation of the Quality-of-Life Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-26) in Korean population.
abstract: We aimed to evaluate the reliability and validity of the adapted Korean version of the Quality-of-Life Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-26). Translation/retranslation of the English version of QUALEFFO was conducted, and all steps of the cross-cultural adaptation process were performed. The Korean version of the visual analog scale measure of pain, QUALEFFO-26 and the previously validated Short Form-36 (SF-36) were mailed to 162 consecutive patients with osteoporosis. Factor analysis and reliability assessment by kappa statistics of agreement for each item, the intraclass correlation coefficient and Cronbach's α were conducted. Construct validity was also evaluated by comparing the responses of QUALEFFO-26 with the responses of SF-36 using Pearson's correlation coefficient. Factor analysis extracted 3 factors. All items had a kappa statistics of agreement greater than 0.6. The QUALEFFO-26 showed good test/retest reliability (QUALEFFO-26: 0.8271). Internal consistency of Cronbach's α was found to be very good (QUALEFFO-26: 0.873). The Korean version of QUALEFFO-26 showed good significant correlation with SF-36 total score and with single SF-36 domains scores. The adapted Korean version of the QUALEFFO-26 was successfully translated and showed acceptable measurement properties and, as such, is considered suitable for outcome assessments in the Korean-speaking patients with osteoporosis.
authors.affiliation: Department of Orthopaedic Surgery, School of Medicine, Medical Research Institute, Pusan National University, 1-10 Ami-Dong, Seo-Gu, Busan, 602-739, Republic of Korea, jungsublee@pusan.ac.kr.
authors.forename: Jung Sub
authors.initials: JS
authors.lastname: Lee
authors.forename: Jong Ki
authors.initials: JK
authors.lastname: Shin
authors.forename: Seung Min
authors.initials: SM
authors.lastname: Son
authors.forename: Sung Jin
authors.initials: SJ
authors.lastname: An
authors.forename: Sung Shik
authors.initials: SS
authors.lastname: Kang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000706:statistics & numerical data*; D001851:Bone Diseases, Metabolic / Q000208:ethnology*; D054521:Cultural Competency; D005260:Female; D050723:Fractures, Bone / Q000208:ethnology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000208:ethnology*; D011788:Quality of Life; D015203:Reproducibility of Results; D056910:Republic of Korea / Q000453:epidemiology; D011795:Surveys and Questionnaires / Q000592:standards*; D014175:Translating