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Healthcare 2016, 4(4), 87; doi:10.3390/healthcare4040087

Construct Validity of the Late-Life Function and Disability Instrument in African American Breast Cancer Survivors

Institute of Healthy Aging, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
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Academic Editors: Joanne Reid and Helen Noble
Received: 3 August 2016 / Revised: 10 November 2016 / Accepted: 14 November 2016 / Published: 16 November 2016
(This article belongs to the Special Issue Holistic Needs of Those Living with and beyond Breast Cancer)
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Abstract

Limited data exist on the validity of the Late-Life Function and Disability (LLFD) instrument in cancer survivors. We examined the construct validity of the abbreviated LLFD instrument in a sample of African-American breast cancer survivors. African American breast cancer survivors (n = 181) aged 50 years and older completed the abbreviated LLFD instrument and questions about sociodemographic and lifestyle characteristics. Confirmatory factor analysis (CFA), Cronbach alphas, and structural models were used to evaluate the construct validity of these measures. Minor modifications were made to the three-factor functional component portion of the inventory to improve model fit. Cronbach alpha’s (range 0.85–0.92) and inter-factor correlations (r = 0.3–0.5, all p < 0.05) were appropriate. The two-factor disability component fit the data and Cronbach alpha’s (0.91 and 0.98) were appropriate with a high inter-factor correlation (r = 0.95, p < 0.01). The average variance extracted (range = 0.55–0.93) and composite reliabilities (range = 0.86–0.98) were in acceptable ranges. Floor effects ranged from 7% for advanced lower function to 74% for personal role disability. Education and number of comorbidities were correlated significantly with functional outcomes. The abbreviated LLFD instrument had adequate construct validity in this sample of African American breast cancer survivors. Further studies are needed that examine the stability of the instrument over time. View Full-Text
Keywords: African American; breast cancer, cancer survivorship; comorbid conditions; disability; education; functional status; validity; reliability African American; breast cancer, cancer survivorship; comorbid conditions; disability; education; functional status; validity; reliability
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pandya, E.; Mistry, J.; Dobhal, M.; Borra, S.; Paxton, R.J. Construct Validity of the Late-Life Function and Disability Instrument in African American Breast Cancer Survivors. Healthcare 2016, 4, 87.

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