Relative and biomarker-based validity of a food-frequency questionnaire estimating intake of fats and cholesterol.
The relative validity of a 104-item food-frequency method to assess intakes of fats and cholesterol was tested against the dietary history of 191 men and women. Pearson correlation coefficients ranged from 0.38 for linoleic acid (% of energy) to 0.83 for energy intake, with 0.78 and 0.75 for the intakes of total fat and saturated fatty acids, respectively. Mean intakes were overestimated by the food-frequency questionnaire relative to the dietary history by 5% for energy and monounsaturated fatty acids (% of energy) and up to 30% for linoleic acid intake. Linoleic acid concentrations in erythrocytes and adipose tissue were used as biomarkers of intake. The correlation of the linoleic acid intake according to the food-frequency questionnaire with linoleic acid in erythrocytes and adipose tissue was 0.44 and 0.28, respectively, and the dietary history gave similar values. The food-frequency questionnaire gives results similar to those from the dietary history and is thus considered appropriate for classifying subjects according to their fat intake.
Department of Human Nutrition, Wageningen Agricultural University, The Netherlands.
G I
GI
Feunekes
W A
WA
Van Staveren
J H
JH
De Vries
J
J
Burema
J G
JG
Hautvast
D000328:Adult; D015415:Biomarkers / Q000032:analysis*; D002791:Cholesterol, Dietary / Q000008:administration & dosage*; D015930:Diet Records; D004041:Dietary Fats / Q000008:administration & dosage*; D004910:Erythrocyte Membrane / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis; D005260:Female; D006801:Humans; D019787:Linoleic Acid; D008041:Linoleic Acids / Q000032:analysis; D008297:Male; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires
D015415:Biomarkers; D002791:Cholesterol, Dietary; D004041:Dietary Fats; D005227:Fatty Acids; D008041:Linoleic Acids; D019787:Linoleic Acid