Assessing health-related quality of life of Chinese-American breast cancer survivors: a measurement validation study

Authors

  • Kimlin Ashing-Giwa,

    Corresponding author
    • Center of Community Alliance for Research and Education (CCARE), Department of Population Sciences, City of Hope National Medical Center, San Dimas, CA, USA
    Search for more papers by this author
  • Chun Nok Lam,

    1. Center of Community Alliance for Research and Education (CCARE), Department of Population Sciences, City of Hope National Medical Center, San Dimas, CA, USA
    Search for more papers by this author
  • Bin Xie

    1. School of Community and Global Health, Claremont Graduate University, San Dimas, CA, USA
    Search for more papers by this author

Center of Community Alliance for Research and Education (CCARE), Department of Population Sciences, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010-3000, USA. E-mail: kashing@coh.org

Abstract

Background

This study reports on the internal consistency and construct validity of the Functional Assessment of Cancer Therapy – General (FACT-G v.4) and 12-item Short Form Health Survey (SF-12 v.2) health-related quality of life (HRQOL) instruments with Chinese-American breast cancer survivors (BCS).

Methods

Participants completed mailed questionnaires at baseline and 12-month follow-up. HRQOL was measured using the FACT-G and the SF-12. The measures were evaluated by construct validity and reliability tests. Factor analyses were performed in a two-wave assessment through exploratory and confirmatory analyses at baseline and follow-up.

Results

Seventy-four Chinese-American BCS participated. Excellent internal consistency (α > 0.85) and good construct validity for the FACT-G (five factors) and the SF-12 (two factors) were observed. Factor structure of both measures accounted for 70% of the common variance in physical, social/family, emotional, and functional well-being subscales for the FACT-G and in physical and mental components for the SF-12.

Conclusions

Our data demonstrated good internal consistency and construct validity of the measures. The psychometric findings demonstrate the utility of the FACT-G and the SF-12 to assess HRQOL among Chinese-American BCS. Copyright © 2012 John Wiley & Sons, Ltd.

Ancillary