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. 2006 Dec 1:4:92.
doi: 10.1186/1477-7525-4-92.

Evaluation of the Quality of Life in Adult Cancer Survivors (QLACS) scale for long-term cancer survivors in a sample of breast cancer survivors

Nancy E Avis  1 , Edward Ip, Kristie Long Foley
Affiliations

Evaluation of the Quality of Life in Adult Cancer Survivors (QLACS) scale for long-term cancer survivors in a sample of breast cancer survivors

Nancy E Avis et al. Health Qual Life Outcomes. .

Abstract

Background: This paper evaluates psychometric properties of a recently developed measure focusing on the health-related quality of life (HRQL) of long-term cancer survivors, the Quality of Life in Adult Survivors scale (QLACS), in a sample of breast cancer survivors. This represents an important area of study, given the large number of breast cancer patients surviving many years post diagnosis.

Methods: Analyses are based on an 8-year follow-up of a sample of breast cancer survivors who participated in an earlier study conducted in 1995. Participants were re-contacted in 2003 and those who were reachable and agreed to participate (n = 94) were surveyed using a variety of measures including the QLACS. Additional follow-up surveys were conducted 2 weeks and one year later. Psychometric tests of the QLACS included test-retest reliability, concurrent and retrospective validity, and responsiveness.

Results: The QLACS domain and summary scores showed good test-retest reliability (all test-retest correlations were above .7) and high internal consistency. The Generic Summary Score showed convergent validity with other measures designed to assess generic HRQL. The Cancer-Specific Summary score exhibited divergent validity with generic HRQL measures, but not a cancer-related specific measure. The QLACS Cancer-Specific Summary Score demonstrated satisfactory predictive validity for factors that were previously shown to be correlated with HRQL. The QLACS generally demonstrated a high level of responsiveness to life changes.

Conclusion: The QLACS may serve as a useful measure for assessing HRQL among long-term breast cancer survivors that are not otherwise captured by generic measures or those specifically designed for newly diagnosed patients.

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Timeframe for Assessments.
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References

    1. Bottomley A. The cancer patient and quality of life. The Oncologist. 2002;7:120–125. doi: 10.1634/theoncologist.7-2-120. - DOI - PubMed
    1. Gotay CC, Korn EL, McCabe MS, Moore TD, Cheson BD. Quality-of-life assessment in cancer treatment protocols: research issues in protocol development. J Natl Cancer Inst. 1992;84:575–579. - PubMed
    1. Tanaka T, Gotay CC. Physicians' and medical students' perspectives on patients' quality of life. Acad Med. 1998;73:1003–1005. doi: 10.1097/00001888-199809000-00022. - DOI - PubMed
    1. Society AC. Cancer Facts and Figures, 2005. American Cancer Society. 2005.
    1. Gotay CC, Muraoka MY. Quality of life in long-term survivors of adult-onset cancers. J Natl Cancer Inst. 1998;90:656–667. doi: 10.1093/jnci/90.9.656. - DOI - PubMed

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