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Inicio Actas Urológicas Españolas (English Edition) Quality-of-life survey for patients diagnosed with nonmuscle-invasive bladder ca...
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Vol. 40. Issue 4.
Pages 251-257 (May 2016)
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Vol. 40. Issue 4.
Pages 251-257 (May 2016)
Original article
DOI: 10.1016/j.acuroe.2016.02.019
Quality-of-life survey for patients diagnosed with nonmuscle-invasive bladder cancer
Cuestionario de calidad de vida para pacientes con cáncer de vejiga no músculo invasivo
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I. Abáigar-Pedrazaa,
Corresponding author
iramedi@hotmail.com

Corresponding author.
, J. Megías-Garrigósa, J. Sánchez-Payáb
a Servicio de Urología, Hospital General Universitario de Alicante, Alicante, Spain
b Unidad de Epidemiología, Servicio de Medicina Preventiva, Hospital General Universitario de Alicante, Alicante, Spain
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Tables (3)
Table 1. Assessment of the reliability of the questionnaire of quality of life.
Table 2. Association study between the results of the CAVICAVENMI questionnaire and the Functional Assessment of Cancer Therapy-Bladder Cancer (FACT-BL) questionnaire before surgery and on the second visit after the operation.
Table 3. Association study between variables of the CAVICAVENMI questionnaire (before surgery) and objective tumor characteristics of poorer quality of life.
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Abstract
Objective

To determine the reliability and validity of a quality-of-life survey for patients with nonmuscle-invasive bladder cancer.

Material and methods

A total of 180 patients were included in the study. We developed a survey with 21 questions grouped into 5 areas. The patients filled in this survey and the Functional Assessment of Cancer Therapy – Bladder Cancer (FACT-BL) survey. To assess reliability, we calculated Cronbach's alpha coefficient and the kappa index. To determine criterion validity, we studied the association between the scores obtained from our survey and those from the FACT-BL survey using the Pearson correlation coefficient. To determine the construct validity (factorial and discriminatory), we performed a factor analysis, comparing it with Student's t-test for the scores obtained according to the tumor characteristics of reduced quality of life (e.g., malignancies located at the trigone of the bladder).

Results

Cronbach's alpha reliability coefficient was .83, and the kappa index varied between .7 and 1. For the association study between the new survey and the FACT-BL survey, we measured an r=.82 for the overall score and between r=.68 (disease) and r=.97 (sex life) in the various measures. In the factor analysis, we measured a Kaiser-Meyer-Olkin index of .77 and performed the Barlett test (p<.001). The comparison between the scores, in the presence or absence of certain tumor characteristics, has shown a reduced quality of life when those characteristics are present, which was statistically significant (p<.05) in the majority of cases.

Conclusion

Our survey to measure the quality of life of patients with nonmuscle-invasive bladder cancer is reliable and valid.

Keywords:
Reliability
Validity
Quality of life
Superficial bladder cancer
Resumen
Objetivo

Evaluar la fiabilidad y validez de un cuestionario de calidad de vida en pacientes con cáncer de vejiga no músculo invasivo.

Materiales y métodos

Se incluyeron 180 pacientes. Se elaboró un cuestionario de 21 preguntas agrupadas en 5 áreas que los pacientes cumplimentaban. A su vez, los pacientes cumplimentaban el cuestionario Functional Assessment of Cancer Therapy- Bladder Cancer (FACT-BL). Para estudiar la fiabilidad se calculó el coeficiente Alfa de Cronbach y el Índice Kappa. Para estudiar la validez de criterio se estudió, con el coeficiente de correlación de Pearson, la asociación entre las puntuaciones obtenidas por el nuevo cuestionario y el FACT-BL. Para estudiar la validez de constructo (factorial y discriminante) se realizó análisis factorial, comparándose con la «t» de Student, las puntuaciones según características tumorales objetivas de peor calidad de vida (por ejemplo localización en trígono).

Resultados

El Alfa de Cronbach fue 0,83 y los Índices Kappa oscilaron entre 0,7 y 1. En el estudio de asociación del nuevo cuestionario y FACT-BL se obtuvo una r=0,82 para la puntuación global, y entre una r=0,68 (enfermedad) y una r=0,97 (vida sexual) en las diferentes dimensiones. En el análisis factorial se obtuvo KMO=0,77 y test de Barlett p<0,001. La comparación de las puntuaciones en presencia o ausencia de determinadas características tumorales han obtenido peores resultados de calidad de vida en presencia de las mismas, en la mayoría de ocasiones, estadísticamente significativas (p<0.05).

Conclusión

El cuestionario elaborado para medir la calidad de vida de los pacientes con cáncer de vejiga no músculo invasivo es fiable y válido.

Palabras clave:
Fiabilidad
Validez
Calidad de vida
Cáncer de vejiga superficial

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