RESUMO
OBJECTIVE: To validate the health-related quality of life questionnaire EORTC QLQ STO-22 for patients with gastric cancer in Peru, evaluating cultural and psychometric characteristics. MATERIALS AND METHODS: The first phase consisted in measure the content and appearance validity. In the second phase, the questionnaire was applied to patients diagnosed with gastric cancer and the internal consistency, test-retest reliability, convergent validity, discriminant validity and criterion validity was determined. RESULTS: After performing the content and appearance validity the questions/items 31 and 39 were changed. The global Cronbach's α was 0.90 and α coefficients greater than 0.7 in the multi-item subscales was obtained. The test-retest reliability showed an overall correlation of 0.924. When analyzing the convergent and discriminant validity, the values of Pearson's "r" were higher between an item and its own subscale, than the same item with other multi-item sub-scales. The criterion validity of the EORTC QLQ STO-22 compared with the EORTC QLQ C-30 showed a positive correlation of 0.727 with items evaluating symptomatology, and a negative correlation of -0.587 when comparing with functional status items, both statistically significant. CONCLUSION: The modified questionnaire EORTC QLQ STO-22 meets the reliability and validity criteria for assessing the quality of life in patients with gastric cancer in Peru.
Assuntos
Adenocarcinoma , Assistência à Saúde Culturalmente Competente , Indicadores Básicos de Saúde , Qualidade de Vida , Neoplasias Gástricas , Inquéritos e Questionários , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Peru , Estudos Prospectivos , Psicometria , Reprodutibilidade dos Testes , TraduçõesRESUMO
Realizar la adaptación cultural y validación psicométrica del cuestionario EORTC QLQ û STO 22 para evaluar la calidad de vida de los pacientes con cáncer gástrico en el Perú. Materiales y métodos: La primera fase consistió en evaluar la validez de contenido y de apariencia. En la segunda fase se aplicó el cuestionario a pacientes con diagnóstico de cáncer gástrico y se determinó la consistencia interna, confiabilidad test re-test, validez convergente, validez discriminante y validez de criterio. Resultados: La validez de contenido y de apariencia permitió modificar el cuestionario en dos preguntas/ítems (31 y 39). Se obtuvo un alfa de Cronbach global de 0,90 y coeficientes mayores a 0,7 en las sub-escalas multi-ítem. La fiabilidad test retest mostró una correlación global de 0,924. Al analizar la validez convergente y discriminante se encontró que los valores de r de Pearson fueron mayores entre un ítem y su propia sub-escala, y menores con sub-escalas diferentes a la propia. Al realizar la validez de criterio comparada con el cuestionario EORTC QLQ C-30 se halló una correlación de 0,727 con los ítems de sintomatología y una correlación de -0,587 con los ítems de funcionalidad, ambos estadísticamente significativos. Conclusión: El cuestionario EORTC QLQ STO 22 modificado cumple con los criterios confiabilidad y validez para evaluar la calidad de vida en pacientes con cáncer gástrico en el Perú...
To validate the health-related quality of life questionnaire EORTC QLQ STO-22 for patients with gastric cancer in Peru, evaluating cultural and psychometric characteristics. Materials and methods: The first phase consisted in measure the content and appearance validity. In the second phase, the questionnaire was applied to patients diagnosed with gastric cancer and the internal consistency, test-retest reliability, convergent validity, discriminant validity and criterion validity was determined. Results: After performing the content and appearance validity the questions/items 31 and 39 were changed. The global CronbachÆs alfa was 0.90 and alfa coefficients greater than 0.7 in the multi-item subscales was obtained. The test-retest reliability showed an overall correlation of 0.924. When analyzing the convergent and discriminant validity, the values of PearsonÆs ôrõ were higher between an item and its own subscale, than the same item with other multi-item sub-scales. The criterion validity of the EORTC QLQ STO-22 compared with the EORTC QLQ C-30 showed a positive correlation of 0.727 with items evaluating symptomatology, and a negative correlation of -0.587 when comparing with functional status items, both statistically significant. Conclusion: The modified questionnaire EORTC QLQ STO-22 meets the reliability and validity criteria for assessing the quality of life in patients with gastric cancer in Peru...
