Validity and reliability of the Korean version of the world health organization quality of life instrument-older adults module

Abstract

The World Health Organization Quality of Life Instrument-Older Adults Module (WHOQOL-OLD) is a scale that measures quality of life (QoL) based on the characteristics of older adults. This study aimed to evaluate the reliability and validity of the Korean version of the WHOQOL-OLD. It was administered to 273 older adults by convenience sampling in Jeonbuk, South Korea. The six-factor model was validated by confirmatory factor analysis (χ2=462.52 [p<.001], normed χ2=1.95, comparative fit index=0.94, Tucker–Lewis index=0.92, standardized root mean residual=0.06, root mean square error of approximation=0.059). Concurrent validity was demonstrated with the WHOQOL-BREF (r = 00.708), SF-12 (r = 0.508) and the Depression, Anxiety and Stress Scale (r=-0.499). In addition, the Korean version of the WHOQOL-OLD was evaluated for known group validity. Cronbach's alpha coefficient for the total scale was 0.897. The Korean version of the WHOQOL-OLD showed acceptable validity and reliability for measuring QoL in older Korean adults. © 2020 Elsevier Inc.