Construct validity of the EORTC quality of life questionnaire information module

Purpose Providing sufficient information about diagnosis and treatment is an important feature of high-quality patient care in oncology. To measure patient satisfaction with information received, the European Organisation for Research and Treatment of Cancer Quality of Life Group has recently develo...

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Bibliographic Details
Published in:Quality of life research 2013-02, Vol.22 (1), p.123-129
Main Authors: Singer, Susanne, Engelberg, Philipp M., Weißflog, Gregor, Kuhnt, Susanne, Ernst, Jochen
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Breast cancer
Cancer therapies
Communicable disease control
Construct validity
Cronbach's alpha
Discriminant analysis
Disease models
Factor analysis
Factor Analysis, Statistical
Female
Genital Neoplasms, Female - psychology
Genital Neoplasms, Female - therapy
Germany
Humans
Information
Male
Medicine
Medicine & Public Health
Middle Aged
Modeling
Oncology
Patient Satisfaction
Psychometrics
Psychometrics - instrumentation
Public Health
Quality of Life
Quality of Life Research
Questionnaires
Reproducibility of Results
Socioeconomic Factors
Sociology
Surveys and Questionnaires - standards
Urologic Neoplasms - psychology
Urologic Neoplasms - therapy
Validation studies
Validity
Variables
Young Adult
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Summary:Purpose Providing sufficient information about diagnosis and treatment is an important feature of high-quality patient care in oncology. To measure patient satisfaction with information received, the European Organisation for Research and Treatment of Cancer Quality of Life Group has recently developed a new tool, the information module (INFO25). The aim of this study was to evaluate the scale structure of the INFO25. Methods A total of n = 423 patients completed the INFO25 after finishing cancer therapy. The internal consistency of multi-item subscales was calculated using Cronbach's Alpha. The scale structure was evaluated using multi-trait methods and confirmatory factor analysis. Results Cronbach's Alpha of the multi-item scales ranged from 0.79 to 0.88. Only two items correlated somewhat higher with another scale than with their own, indicating a good scale structure. Construct validity with latent variable models, including a general information factor and four multi-item scales, resulted in the following fit indices CFI = 0.96, RMSEA = 0.08, TLI = 0.99 and WRMR = 1.03. Conclusion The suggested construct of the INFO25 with a total score (general factor) in addition to the subscales is valid.
ISSN:0962-9343
1573-2649
DOI:10.1007/s11136-012-0114-x