Journal
EUROPEAN JOURNAL OF CANCER
Volume 47, Issue 4, Pages 554-560Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ejca.2010.10.027
Keywords
Quality of life; Palliative care; Advanced cancer; QUAL-E; FACT-G; Factor analysis; Psychometrics; Construct validity
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Funding
- Canadian Cancer Society (CCS) [020509]
- Ontario Ministry of Health and Long Term Care
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Objective: Improving quality of life is the main goal of palliative cancer care. However, there is a lack of measures validated specifically for advanced cancer. The purpose of this study was to validate the Quality of Life at the End of Life (QUAL-E) measure in a sample of patients with advanced cancer. Methods: Data were analysed for 464 patients with advanced cancer who were participating in a randomised controlled trial of early palliative care intervention versus routine care. Patients completed the 26-item QUAL-E, the Functional Assessment of Cancer Therapy (FACT-G) quality of life measure and measures of spiritual well-being, performance status, symptom burden, satisfaction with care and communication with health care providers. We conducted a confirmatory factor analysis on the QUAL-E to test for the hypothesised four-factor structure and examined construct validity by calculating correlations with relevant scales. Results: A 17-item reduced version of the QUAL-E, the QUAL-E-Cancer (QUAL-EC) achieved an acceptable fit to a four-factor model. Both the full and reduced versions of the QUAL-E were internally reliable and showed good construct validity. Symptom Control was correlated with other measures of physical functioning; Relationship with Healthcare Provider was correlated with satisfaction with care and better physician and nurse communication; Preparation for End of Life was strongly associated with emotional well-being; and Life Completion was strongly associated with social and spiritual well-being. Conclusions: Due to its good factor structure and sound psychometrics, we recommend the reduced QUAL-EC scale to assess quality of life in patients with advanced cancer. (c) 2010 Elsevier Ltd. All rights reserved.
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