RT Journal Article
T1 Bladder cancer index: cross-cultural adaptation into Spanish and psychometric evaluation.
A1 Schmidt, Stefanie
A1 Riel, Ricard
A1 Frances, Albert
A1 Lorente Garin, José Antonio
A1 Bonfill, Xavier
A1 Martinez-Zapata, María José
A1 Morales Suarez-Varela, Maria
A1 dela Cruz, Javier
A1 Emparanza, José Ignacio
A1 Sanchez-Perez, Maria-Jose
A1 Zamora, Javier
A1 Ramos Goñi, Juan Manuel
A1 Alonso, Jordi
A1 Ferrer, Montse
K1 Urinary bladder neoplasms
K1 Quality of life
K1 Patient outcome
K1 Validation studies
K1 Psychometrics
K1 Neoplasias de la Vejiga Urinaria
K1 Calidad de Vida
K1 Estudios de Validación
K1 Psicometría
AB BACKGROUNDThe 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.METHODSFor 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.RESULTSReliability 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.CONCLUSIONSThe 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.
PB BioMed Central
YR 2014
FD 2014-02-15
LK http://hdl.handle.net/10668/1591
UL http://hdl.handle.net/10668/1591
LA en
NO 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
NO Journal Article; Research Support, Non-U.S. Gov't;
DS RISalud
RD Apr 10, 2025