Measurement Error in Dietary Data: Implications for the Epidemiologic Study of the Diet-Disease Relationship
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OBJECTIVES: To examine the effect of measurement error in dietary data on the relationship between diet and body mass index (BMI). To correct for the effect of measurement error on diet-BMI association by using replicate measurements of diet. The effect of measurement error on diet--BMI relationship was simulated, and its implications are discussed. DESIGN: Prospective study design. SETTING: The first and second China Health and Nutrition Survey conducted in 1989 and 1991, respectively. SUBJECTS: Three thousand, four hundred and seventy-nine adults age 20-45 y at the 1989 survey. METHODS: Statistical methods were used to demonstrate the effect of measurement error in dietary data on the diet-BMI association. RESULTS: By using the average of three replicate 24 h dietary recalls, the attenuation of diet-BMI association was reduced substantially. The regression coefficients of fat and energy intakes differed markedly from those computed by using only single measurement of diet. CONCLUSIONS: Measurement error in dietary data may significantly attenuate the diet-disease association. Where appropriate, specific emphasis may be needed to address the problem of measurement error in the study of diet-disease relationship.
JOUR
Paeratakul, Sahasporn
Popkin, Barry M.
Kohlmeier, L.
Hertz-Picciotto, I.
Guo, X.
Edwards, L. J.
1998
European Journal of Clinical Nutrition
52
10
722-7
10.1038/sj.ejcn.1600633
372