Development, internal reliability and preliminary construct validity of the Dutch Dietary Intention Evaluation Tool for In-patients (DIETI)
Nutrition Metabolism and Cardiovascular Diseases, vol. 33, pp. 56–64
Abstract
Background and aims Diet is important in prevention and management of non-communicable disease and in particular, cardiovascular disease. Recently, more hospitals gear towards healthier dietary policies, however, a tool to assess the effect of these interventions in patient populations is currently lacking. The Theory of Planned Behavior (TPB) is generally used to assess health-related behavior and offers a framework for development of questionnaires. In this study, we aim to evaluate the reliability, internal consistency and preliminary construct validity of the newly developed Dietary Intention Evaluation Tool for In-hospital patients (DIETI) which is based on the TPB. Methods and results An expert panel constructed the item list of the DIETI. A total of 312 patients admitted to the cardiology ward filled out the DIETI. Explanatory- and confirmatory factor analysis showed that our tool adequately discerns five TPB-consistent factors regarding a healthy diet in hospitalized patients. (N = 312, for the CFA model χ 2 = 313.072 (df = 160, p < 0.001, CFI = 0.939, RMSEA = 0.058). Subsequent analysis of reliability showed satisfactory to strong internal consistency of the questionnaire as a whole and all subscales (Cronbach's alpha for the subscales ranging between 0.65 and 0.88). Conclusions We conclude that the DIETI is an internally reliable tool to assess behavioral intentions regarding a healthy diet of in-hospital patients. Thus, this questionnaire can be used to evaluate the effect of dietary interventions aimed at hospitalized patients.
Authors 8
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
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Zsuzsa Bakk Aachen Section of Methodology and Statistics Department of Psychology, Leiden University
Affiliation as printed
Section of Methodology and Statistics, Department of Psychology, Leiden University, Leiden, the Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands. Electronic address: d.e.atsma@lumc.nl
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
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Leiden University · Leiden University Medical Center
Affiliation as printed
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands; Health, Medical and Neuropsychology, Leiden University, Leiden, the Netherlands
Department of Cardiology, Leiden University Medical Centre, Leiden, Netherlands
Health, Medical and Neuropsychology, Leiden University, Leiden, the Netherlands
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