Social desirability bias in dietary self-report may compromise the validity of dietary intake measures.
Self-report of dietary intake could be biased by social desirability or social approval thus affecting risk estimates in epidemiological studies.
Social desirability and social approval biases were tested by comparing nutrient scores derived from multiple 24-hour diet recalls (24HR) on seven randomly assigned days with those from two 7-day diet recalls (7DDR) (similar in some respects to commonly used food frequency questionnaires), one administered at the beginning of the test period (pre) and one at the end (post).
Statistical analysis included correlation and multiple linear regression.
Cross-sectionally, no relationships between social approval score and the nutritional variables existed.
Social desirability score was negatively correlated with most nutritional variables.
In linear regression analysis, social desirability score produced a large downward bias in nutrient estimation in the 7DDR relative to the 24HR.
For total energy, this bias equalled about 50 kcal/point on the social desirability scale or about 450 kcal over its interquartile range.
Individuals having the highest 24HR-derived fat and total energy intake scores had the largest downward bias due to social desirability.
We observed a large downward bias in reporting food intake related to social desirability score.
These results are consistent with the theoretical constructs on which the hypothesis is based.
Mots-clés Pascal : Consommation alimentaire, Comportement alimentaire, Mesure, Méthodologie, Homme, Sexe, Biais méthodologique, Entretien, Autoévaluation, Désirabilité sociale
Mots-clés Pascal anglais : Food intake, Feeding behavior, Measurement, Methodology, Human, Sex, Methodological bias, Interview, Self evaluation, Social desirability
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0317870
Code Inist : 002B30A01A1. Création : 01/03/1996.