Title |
Reliability and validity of the Functional Assessment of Cancer Therapy-Breast quality-of-life instrument.
|
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Published in |
Journal of Clinical Oncology, March 1997
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DOI | 10.1200/jco.1997.15.3.974 |
Pubmed ID | |
Authors |
M J Brady, D F Cella, F Mo, A E Bonomi, D S Tulsky, S R Lloyd, S Deasy, M Cobleigh, G Shiomoto |
Abstract |
This is the first published report on the validation of the Functional Assessment of Cancer Therapy-Breast (FACT-B), a 44-item self-report instrument designed to measure multidimensional quality of life (QL) in patients with breast cancer. The FACT-B consists of the FACT-General (FACT-G) plus the Breast Cancer Subscale (BCS), which complements the general scale with items specific to QL in breast cancer. The FACT-B was developed with an emphasis on patients' values and brevity and is available in nine languages. Two validation samples were used for this report. The first (n = 47) was tested twice over a 2-month period to assess sensitivity to change. Significant sensitivity to change in performance status rating (PSR) was demonstrated for the FACT-B total score, the Physical Well-Being (PWB) subscale, the Functional Well-Being (FWB) subscale, and the BCS. Sensitivity to change in QL as measured by the Functional Living Index-Cancer (FLIC) was documented in the FACT-B total score, PWB, FWB, and Emotional Well-Being (EWB). Additional validity and reliability data were obtained from a larger sample (n = 295). The alpha coefficient (internal consistency) for the FACT-B total score was high (alpha = .90), with subscale alpha coefficients ranging from .63 to .86. Evidence supported test-retest reliability, as well as convergent, divergent, and known groups validity. The FACT-B is appropriate for use in oncology clinical trials, as well as in clinical practice. It demonstrates ease of administration, brevity, reliability, validity, and sensitivity to change. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 5 | 1% |
Colombia | 2 | <1% |
Malaysia | 1 | <1% |
Chile | 1 | <1% |
Germany | 1 | <1% |
Brazil | 1 | <1% |
Hong Kong | 1 | <1% |
Romania | 1 | <1% |
Iran, Islamic Republic of | 1 | <1% |
Other | 0 | 0% |
Unknown | 382 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 55 | 14% |
Researcher | 52 | 13% |
Student > Bachelor | 52 | 13% |
Student > Master | 45 | 11% |
Student > Doctoral Student | 29 | 7% |
Other | 69 | 17% |
Unknown | 94 | 24% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 89 | 22% |
Nursing and Health Professions | 54 | 14% |
Psychology | 53 | 13% |
Agricultural and Biological Sciences | 14 | 4% |
Sports and Recreations | 14 | 4% |
Other | 53 | 13% |
Unknown | 119 | 30% |