Psychometric evaluation of the WHOQOL-BREF, Taiwan version, across five kinds of Taiwanese cancer survivors: Rasch analysis and confirmatory factor analysis

Chung-Ying LIN, Jing-Shiang HWANG, Wen Chung WANG, Wu-Wei LAI, Wu-Chou SU, Tzu-Yi WU, Grace YAO, Jung-Der WANG

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Abstract

Background: Quality of life (QoL) is important for clinicians to evaluate how cancer survivors judge their sense of well-being, and WHOQOL-BREF may be a good tool for clinical use. However, at least three issues remain unresolved: (1) the psychometric properties of the WHOQOL-BREF for cancer patients are insufficient; (2) the scoring method used for WHOQOL-BREF needs to be clarify; (3) whether different types of cancer patients interpret the WHOQOL-BREF similarly.
Methods: We recruited 1000 outpatients with head/neck cancer, 1000 with colorectal cancer, 965 with liver cancer, 1438 with lung cancer and 1299 with gynecologic cancers in a medical center. Data analyses included Rasch models, confirmatory factor analysis (CFA), and Pearson correlations.
Results: The mean WHOQOL-BREF domain scores were between 13.34 and 14.77 among all participants. CFA supported construct validity; Rasch models revealed that almost all items were embedded in their expected domains and were interpreted similarly across five types of cancer patients; all correlation coefficients between Rasch scores and original domain scores were above 0.9.
Conclusions: The linear relationship between Rasch scores and domain scores suggested that the current calculations for domain scores were applicable and without serious bias. Clinical practitioners may regularly collect and record the WHOQOL-BREF domain scores into electronic health records. Copyright © 2018 Formosan Medical Association. Published by Elsevier Taiwan LLC. This is an open access article under the CCBY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Original languageEnglish
Pages (from-to)215-222
JournalJournal of the Formosan Medical Association
Volume118
Issue number1
Early online dateApr 2018
DOIs
Publication statusPublished - Jan 2019

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Taiwan
Psychometrics
Statistical Factor Analysis
Survivors
Licensure
Neoplasms
Electronic Health Records
Liver Neoplasms
Head and Neck Neoplasms
Colorectal Neoplasms
Lung Neoplasms
Research Design
Outpatients
Quality of Life

Bibliographical note

Lin, C.-Y., Hwang, J.-S., Wang, W.-C., Lai, W.-W., Su, W.-C., Wu, T.-Y., . . . Wang, J.-D. (2019). Psychometric evaluation of the WHOQOL-BREF, Taiwan version, across five kinds of Taiwanese cancer survivors: Rasch analysis and confirmatory factor analysis. Journal of the Formosan Medical Association, 118(1), 215-222. doi: 10.1016/j.jfma.2018.03.018

Keywords

  • Confirmatory factor analysis
  • Cancer
  • Psychometric properties
  • Quality of life
  • Rasch analysis