J Korean Gerontol Nurs.  2021 Feb;23(1):34-42. 10.17079/jkgn.2021.23.1.34.

A Psychometric Evaluation of a Korean Version of the Quality of Life in Late-Stage Dementia Scale

• Jeong E
• Park MS
• Lee YN
• Chang SO

• KMID: 2540544
• DOI: http://doi.org/10.17079/jkgn.2021.23.1.34

Abstract

Purpose
This study was conducted to translate and validate a Korean version of the Quality of Life in Late-Stage Dementia (QUALID-K) scale.

Methods
A cross-sectional design was applied to culturally adapt and validate the scale. A total of 197 participants from two long-term care hospitals in Korea were recruited. The psychometric properties of the QUALID-K scale, including dimensionality of subscales, concurrent, discriminant, and convergence validity, test-retest reliability, inter-rater reliability, and internal consistency were evaluated.

Results
The QUALID-K scale’s dimensionality differed from the original one-factor structure, and a three-factor model better fit the data. The validity analysis showed a significant association of the QUALID-K with cognitive function, activities of daily living, depressive symptoms, and pain. Test-retest and inter-rater analysis confirmed the measurement’s stability.

Conclusion
The QUALID-K scale appears to be a reliable and valid measurement to assess the quality of life for those with severe dementia in the Korean population.

Keyword

Aged; Dementia; Long-term care; Validation study; Quality of life