Factor construct of health-related quality of life in Taiwanese workers by WHOQOL-BREF questionnaire

Wen Miin Liang, Hsien Wen Kuo, Ching Fa Lin, Haw-Yaw Shy, Hung Wei Chen, Jian Jung Chen

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Purpose: To assess the factor construct of health-related quality of life (HRQL) in Taiwanese workers and to compare the factor construct with the theoretical factor construct of the World Health Organization Quality of Life (WHOQOL). Methods. A total of 1461 (669 females and 792 males; age range, 16 to 69 yr) workers were selected through a representative population survey (7,597,386 Taiwanese workers) in 1999 from the Taiwan Bureau of Labor Insurance by proportional probability sampling. The main outcome measures were HRQL scores assessed from the WHOQOL-BREF questionnaire. The factor construct was analyzed by exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) techniques. Results. EFA showed that only two main factors were meaningful. Factors 1 and 2 accounted for 98% of the total variance (80% for factor 1 and 18% for factor 2). Clearly, most psychological, social and environment items (14 out of 17) had high loading on factor 1 and most physical items (6 out of 7) had high loading on factor 2. Similar results were shown when EFA was applied to males and females separately. Results from CFA revealed that some items might be more influenced by a construct which was not assigned by the WHOQOL theoretical model. The theoretical WHOQOL-BREF factor construct was appropriate for Taiwanese workers after some adjustments were made using modification indices. Conclusions. The results from EFA and CFA were highly consistent. More information about workers' HRQL can be obtained from closely examining the adjustment of factor construct of the model that we analyzed by CFA. Our findings provide a deeper understanding of factor construct for Taiwanese workers' HRQL.

Original languageEnglish
Pages (from-to)113-122
Number of pages10
JournalMid-Taiwan Journal of Medicine
Issue number3
Publication statusPublished - 2005 Sep 1

All Science Journal Classification (ASJC) codes

  • Medicine(all)

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