Títol:
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Bladder cancer index: cross-cultural adaptation into Spanish and psychometric evaluation
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Autor/a:
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Schmidt, Stefanie, 1979-; Riel, Ricard; Frances, Albert; Lorente Garin, José Antonio; Bonfill, Xavier; Martínez Zapata, María José; Morales Suárez-Varela, María; Cruz, Javier de la; Emparanza, José Ignacio; Sánchez, María José; Zamora, Javier; Goñi, Juan Manuel Ramos; Alonso Caballero, Jordi; Ferrer Forés, Maria Montserrat; EMPARO-CU Study Group
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Abstract:
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Background: The Bladder Cancer Index (BCI) is so far the only instrument applicable across all bladder cancer patients, independent of tumor infiltration or treatment applied. We developed a Spanish version of the BCI, and assessed its acceptability and metric properties. Methods: For the adaptation into Spanish we used the forward and back-translation method, expert panels, and cognitive debriefing patient interviews. For the assessment of metric properties we used data from 197 bladder cancer patients from a multi-center prospective study. The Spanish BCI and the SF-36 Health Survey were self-administered before and 12 months after treatment. Reliability was estimated by Cronbach’s alpha. Construct validity was assessed through the multi-trait multi-method matrix. The magnitude of change was quantified by effect sizes to assess responsiveness./nResults: Reliability coefficients ranged 0.75-0.97. The validity analysis confirmed moderate associations between the BCI function and bother subscales for urinary (r = 0.61) and bowel (r = 0.53) domains; conceptual independence among all BCI domains (r ≤ 0.3); and low correlation coefficients with the SF-36 scores, ranging 0.14-0.48. Among patients reporting global improvement at follow-up, pre-post treatment changes were statistically significant for the urinary domain and urinary bother subscale, with effect sizes of 0.38 and 0.53. Conclusions: The Spanish BCI is well accepted, reliable, valid, responsive, and similar in performance compared to the original instrument. These findings support its use, both in Spanish and international studies, as a valuable and comprehensive tool for assessing quality of life across a wide range of bladder cancer patients. |
Abstract:
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This work was supported by grants from Instituto de Salud Carlos III FEDER(PS09/02139; PS09/01204; PS09/01619; PS09/02555; PI12/00772) and from AGAUR (2012FI_B1 00177; 2009 SGR 1095). |
Matèries:
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-Bufeta -- Càncer -Urinary bladder neoplasms -Quality of life -Patient outcomes -Validation studies -Psychometrics |
Drets:
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© 2014 Schmidt et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
http://creativecommons.org/licenses/by/2.0 |
Tipus de document:
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Article Article - Versió publicada |
Publicat per:
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BioMed Central
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