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Title: Bladder cancer index: cross-cultural adaptation into Spanish and psychometric evaluation.
Authors: Schmidt, Stefanie
Riel, Ricard
Frances, Albert
Lorente Garin, José Antonio
Bonfill, Xavier
Martinez-Zapata, María José
Morales Suarez-Varela, Maria
dela Cruz, Javier
Emparanza, José Ignacio
Sánchez, María-José
Zamora, Javier
Ramos Goñi, Juan Manuel
Alonso, Jordi
Ferrer, Montse
metadata.dc.contributor.authoraffiliation: [Schmidt,S; Alonso,J; Ferrer,M] Health Services Research Group, IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. [Schmidt,S; Alonso,J] Department of Experimental and Health Sciences, Universidad Pompeu Fabra (UPF), Barcelona, Spain. [Schmidt,S; Bonfill,X; Martinez-Zapata,MJ; Morales Suarez-Varela,M; dela Cruz,J; Emparanza,JI; Sánchez,MJ; Zamora,J; Alonso,J; Ferrer,M] CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain. [Riel,R] Center of Primary Health Care El Clot, Barcelona, Spain. [Frances,A; Lorente Garin,JA] Department of Urology, Hospital del Mar, Barcelona, Spain. [Bonfill,X; Martinez-Zapata,MJ] Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain. [ Bonfill,X; Ferrer,M] Universitat Autònoma de Barcelona (UAB), Barcelona, Spain. [Morales Suarez-Varela,M] Unit of Public Health and Environmental Care, Department of Preventive Medicine, University of Valencia, Valencia, Spain. [Morales Suarez-Varela,M] Center for Public Health Research (CSISP), Valencia, Spain. [dela Cruz,J] Hospital 12 de Octubre, Madrid, Spain. [Emparanza,JI] Clinical Epidemiology Unit, Hospital Universitario Donostia, BioDonostia, San Sebastian, Spain. [Sánchez,MJ] Escuela Andaluza de Salud Pública, Granada, Spain. [Sánchez,MJ] Instituto de Investigación Biosanitaria de Granada, Granada, Spain. [Zamora,J] Clinical Biostatistics Unit, Hospital Ramón y Cajal (IRYCIS), Madrid, Spain. [Ramos Goñi,JM HTA Unit of the Canary Islands Health Service (SESCS), Tenerife, Spain. [Ramos Goñi,JM] Health Services Research on Chronic Patients Network (REDISSEC), Bilbao, Spain. EMPARO-CU Study Group
Keywords: Urinary bladder neoplasms;Quality of life;Patient outcome;Validation studies;Psychometrics;Neoplasias de la Vejiga Urinaria;Calidad de Vida;Estudios de Validación;Psicometría
metadata.dc.subject.mesh: Medical Subject Headings::Diseases::Neoplasms::Neoplasms by Site::Urogenital Neoplasms::Urologic Neoplasms::Urinary Bladder Neoplasms
Medical Subject Headings::Disciplines and Occupations::Social Sciences::Quality of Life
Medical Subject Headings::Publication Characteristics::Study Characteristics::Validation Studies
Medical Subject Headings::Psychiatry and Psychology::Behavioral Disciplines and Activities::Psychological Tests::Psychometrics
Issue Date: 15-Feb-2014
Publisher: BioMed Central
Citation: Schmidt S, Riel R, Frances A, Lorente Garin JA, Bonfill X, Martinez-Zapata MJ, et al. Bladder cancer index: cross-cultural adaptation into Spanish and psychometric evaluation. Health Qual Life Outcomes 2014; 12:20
Abstract: 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. RESULTS 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.
Description: Journal Article; Research Support, Non-U.S. Gov't;
metadata.dc.identifier.doi: 10.1186/1477-7525-12-20
ISSN: 1477-7525 (Online)
Appears in Collections:01- Artículos - EASP. Escuela Andaluza de Salud Pública
01- Artículos - ibsGRANADA. Instituto de Investigación Biosanitaria de Granada

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