Background Differential underreporting of dietary intake by subgroups of body mass index (BMI) will confound associations between dietary intake and BMI-related diseases.
We estimated the magnitude of BMI-related underreporting for energy, protein, and potassium intake for the Dutch cohorts of the European Prospective Investigation into Cancer and Nutrition (EPIC).
Methods The study population consisted of 134 Dutch ten and women, aged 21-71 years, who participated in a pilot of EPIC.
Ratios of reported dietary intakes to bio-markers were used as measures for underreporting.
Dietary intake was assessed by a food frequency questionnaire (FFQ) and repeated 24-hour dietary recalls.
Biomarker for energy intake was calculated basal metabolic rate ; for protein and potassium intake the biomarker was 24-hour urinary nitrogen and potassium excretion, respectively.
The measures of underreporting were linearly regressed on BMI (in kg/m2).
Results Significant negative regression coefficients were observed when regressing energy ratio on BMI with adjustment for physical activity (FFQ : bêta - 0.04 for men, bêta=-0.02 for women ; 24-hour recalls : bêta=-0.03 for men, bêta=-0.04 for women).
In men, a significant negative regression coefficient (bêta=-0.03) was observed when regressing protein ratio on BMI ; for the recalls however only after adjustment for age and education (bêta=-0.02). (...)
Mots-clés Pascal : Indice masse corporelle, Poids corporel, Régime alimentaire, Protéine, Potassium, Apport énergie, Epidémiologie, Méthodologie, Erreur, Mesure, Homme, Europe, Questionnaire, Comportement, Biométrie, Alimentation
Mots-clés Pascal anglais : Body mass index, Body weight, Diet, Protein, Potassium, Energy input, Epidemiology, Methodology, Error, Measurement, Human, Europe, Questionnaire, Behavior, Biometrics, Feeding
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0252137
Code Inist : 002B29B. Création : 11/09/1998.