Further evaluation of the EORTC QLQ-C30 psychometric properties in a large Brazilian cancer patient cohort as a function of their educational status

Purpose The European Organization for Research and Treatment of Cancer Core Quality of Life Questionnaire (EORTC QLQ-C30) is considered a valid instrument for use in Brazil. However, the previous Brazilian validation study included only 30 lung cancer patients and only measured test-retest reliabili...

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Veröffentlicht in:Supportive care in cancer 2014-08, Vol.22 (8), p.2151-2160
Hauptverfasser: Paiva, Carlos Eduardo, Carneseca, Estela Cristina, Barroso, Eliane Marçon, de Camargos, Mayara Goulart, Alfano, Ana Camila Callado, Rugno, Fernanda Capella, Paiva, Bianca Sakamoto Ribeiro
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container_end_page 2160
container_issue 8
container_start_page 2151
container_title Supportive care in cancer
container_volume 22
creator Paiva, Carlos Eduardo
Carneseca, Estela Cristina
Barroso, Eliane Marçon
de Camargos, Mayara Goulart
Alfano, Ana Camila Callado
Rugno, Fernanda Capella
Paiva, Bianca Sakamoto Ribeiro
description Purpose The European Organization for Research and Treatment of Cancer Core Quality of Life Questionnaire (EORTC QLQ-C30) is considered a valid instrument for use in Brazil. However, the previous Brazilian validation study included only 30 lung cancer patients and only measured test-retest reliability. The aim of this study was to evaluate the psychometric properties of the EORTC QLQ-C30 in a sample of cancer patients at different educational levels who completed the instrument administered by an interviewer. Methods Data from six prospective studies conducted by the same group of researchers were combined in this study ( N  = 986). Results Reliability was assessed using Cronbach’s alpha coefficient, all values of which were >0.7, with the exception of cognitive functioning, social functioning, and nausea and vomiting ( α  = 0.57, α  = 0.69, and α  = 0.68, respectively). In multi-trait scaling analysis, convergent and divergent validity were considered adequate (validity indices were 91.6 and 97.4 %). In general, moderate to strong correlations were found between the subscales of the EORTC QLQ-C30 and its respective dimensions from the WHOQOL-bref, the hospital anxiety and depression scale, and the Edmonton Symptom Assessment System (ESAS) instruments. In addition, the EORTC QLQ-C30 was able to differentiate groups of patients with distinct performance statuses and types of treatment (known-group validation). Statistical analyses were also performed on educational status, yielding similar results. Conclusions Detailed psychometric property data using the EORTC QLQ-C30 in Brazil are added by this study. In addition, we demonstrated that this instrument is in general reliable and valid regardless of the patient educational level.
doi_str_mv 10.1007/s00520-014-2206-3
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However, the previous Brazilian validation study included only 30 lung cancer patients and only measured test-retest reliability. The aim of this study was to evaluate the psychometric properties of the EORTC QLQ-C30 in a sample of cancer patients at different educational levels who completed the instrument administered by an interviewer. Methods Data from six prospective studies conducted by the same group of researchers were combined in this study ( N  = 986). Results Reliability was assessed using Cronbach’s alpha coefficient, all values of which were &gt;0.7, with the exception of cognitive functioning, social functioning, and nausea and vomiting ( α  = 0.57, α  = 0.69, and α  = 0.68, respectively). In multi-trait scaling analysis, convergent and divergent validity were considered adequate (validity indices were 91.6 and 97.4 %). In general, moderate to strong correlations were found between the subscales of the EORTC QLQ-C30 and its respective dimensions from the WHOQOL-bref, the hospital anxiety and depression scale, and the Edmonton Symptom Assessment System (ESAS) instruments. In addition, the EORTC QLQ-C30 was able to differentiate groups of patients with distinct performance statuses and types of treatment (known-group validation). Statistical analyses were also performed on educational status, yielding similar results. Conclusions Detailed psychometric property data using the EORTC QLQ-C30 in Brazil are added by this study. 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However, the previous Brazilian validation study included only 30 lung cancer patients and only measured test-retest reliability. The aim of this study was to evaluate the psychometric properties of the EORTC QLQ-C30 in a sample of cancer patients at different educational levels who completed the instrument administered by an interviewer. Methods Data from six prospective studies conducted by the same group of researchers were combined in this study ( N  = 986). Results Reliability was assessed using Cronbach’s alpha coefficient, all values of which were &gt;0.7, with the exception of cognitive functioning, social functioning, and nausea and vomiting ( α  = 0.57, α  = 0.69, and α  = 0.68, respectively). In multi-trait scaling analysis, convergent and divergent validity were considered adequate (validity indices were 91.6 and 97.4 %). In general, moderate to strong correlations were found between the subscales of the EORTC QLQ-C30 and its respective dimensions from the WHOQOL-bref, the hospital anxiety and depression scale, and the Edmonton Symptom Assessment System (ESAS) instruments. In addition, the EORTC QLQ-C30 was able to differentiate groups of patients with distinct performance statuses and types of treatment (known-group validation). Statistical analyses were also performed on educational status, yielding similar results. Conclusions Detailed psychometric property data using the EORTC QLQ-C30 in Brazil are added by this study. 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However, the previous Brazilian validation study included only 30 lung cancer patients and only measured test-retest reliability. The aim of this study was to evaluate the psychometric properties of the EORTC QLQ-C30 in a sample of cancer patients at different educational levels who completed the instrument administered by an interviewer. Methods Data from six prospective studies conducted by the same group of researchers were combined in this study ( N  = 986). Results Reliability was assessed using Cronbach’s alpha coefficient, all values of which were &gt;0.7, with the exception of cognitive functioning, social functioning, and nausea and vomiting ( α  = 0.57, α  = 0.69, and α  = 0.68, respectively). In multi-trait scaling analysis, convergent and divergent validity were considered adequate (validity indices were 91.6 and 97.4 %). In general, moderate to strong correlations were found between the subscales of the EORTC QLQ-C30 and its respective dimensions from the WHOQOL-bref, the hospital anxiety and depression scale, and the Edmonton Symptom Assessment System (ESAS) instruments. In addition, the EORTC QLQ-C30 was able to differentiate groups of patients with distinct performance statuses and types of treatment (known-group validation). Statistical analyses were also performed on educational status, yielding similar results. Conclusions Detailed psychometric property data using the EORTC QLQ-C30 in Brazil are added by this study. In addition, we demonstrated that this instrument is in general reliable and valid regardless of the patient educational level.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>24652051</pmid><doi>10.1007/s00520-014-2206-3</doi><tpages>10</tpages></addata></record>
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subjects Adult
Aged
Analysis
Brazil
Cancer
Cancer patients
Care and treatment
Cohort Studies
Educational attainment
Educational Status
Female
Humans
Lung cancer
Male
Medicine
Medicine & Public Health
Middle Aged
Neoplasms - physiopathology
Neoplasms - psychology
Nursing
Nursing Research
Oncology
Original Article
Pain Medicine
Psychometrics - methods
Psychometrics - standards
Quality of Life
Quantitative psychology
Rehabilitation Medicine
Reproducibility of Results
Surveys and Questionnaires
title Further evaluation of the EORTC QLQ-C30 psychometric properties in a large Brazilian cancer patient cohort as a function of their educational status
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