Examining the Psychometric Properties of the Taiwanese Version of the Hospice Quality of Life Index

Abstract

Quality of life is an important outcome for people with cancer throughout their cancer trajectory. Having a valid and reliable instrument to measure the quality of life is critical. This cross-sectional study examined the psychometric properties of the Taiwanese version of the Hospice Quality of Life Index among patients with advanced cancer in Taiwan. There were 3 phases: (1) translation of the Hospice Quality of Life Index from English to Mandarin, (2) pilot testing among 30 targeted participants, and (3) field testing to examine validity and reliability. The results of confirmatory factor analysis indicated that the original factor structure of the Hospice Quality of Life Index did not fit the data. After 5 items were deleted from the original questionnaire, principal factor extraction with oblique rotation for exploratory factor analysis yielded 3 subscales: Social/Spiritual Well-Being, Psychological Well-Being, and Functional/ Physiological Well-Being. For convergent validity, the small to moderate strength of associations showed shared variance with the Memorial Symptom Assessment Scale. The internal consistency was supported by Cronbach α ranging from 0.77 to 0.86. This study shows early evidence that the quality of life of people with advanced cancer can be appropriately assessed by the Taiwanese Hospice Quality of Life Index.