Biomarker Evaluation Does Not Confirm Efficacy of Computer-tailored Nutrition Education
2011
Kroeze, Willemieke | Dagnelie, Pieter C. | Heymans, Martijn W. | Oenema, Anke | Brug, Johannes
OBJECTIVE: To evaluate the efficacy of computer-tailored nutrition education with objective outcome measures. DESIGN: A 3-group randomized, controlled trial with posttests at 1 and 6 months post-intervention. SETTING: Worksites and 2 neighborhoods in the urban area of Rotterdam. PARTICIPANTS: A convenience sample of healthy Dutch adults (n = 442). INTERVENTIONS: A computer-tailored intervention delivered on CD-ROM; a computer-tailored intervention delivered in print; and a generic information condition. MAIN OUTCOME MEASURES: Blood lipids (total, high-density lipoprotein, and low-density lipoprotein cholesterol, and triacylglycerol) were measured by analyzing venous blood samples. ANALYSIS: Linear mixed model procedure. RESULTS: There were no significant differences among the 3 intervention groups in total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and triacylglycerol. CONCLUSIONS AND IMPLICATIONS: Contrary to results based on self-report data, no effects of the computer-tailored interventions were found based on objective outcomes. This contradiction calls for a critical reflection on the use of computer-tailored nutrition education interventions and the need to improve those interventions. Furthermore, this study indicates that feasible methods are needed to objectively assess the impact of computer-tailored nutrition education interventions in free-living subjects.
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