Validity of the assessment of dietary intake: problems of misreporting.
OBJECTIVE
This is a review of recent studies on the analysis of misreporting of food intake and on the consequences of misreporting for the interpretation of dietary surveys. Bias in the assessment of dietary intake was analysed from studies comparing reported intake with doubly labelled water assessed energy expenditure.


RESULTS
There is not yet a method for the accurate determination of dietary intake. Physical and psychological characteristics of study participants play an important role in the observed reporting bias. The degree of misreporting might increase with repeated dietary assessment in the same subjects, confounding the results of intervention studies.


CONCLUSIONS
Campaigns aimed at changing food intake might not be as successful as concluded from the results of national food consumption measurements. Subjects might be reporting according to expected instead of real intake. In a clinical setting, the increased awareness of the nursing staff has been observed to result in overreporting of intake.
Westerterp
Klaas R
KR
Department of Human Biology, Maastricht University, Maastricht, The Netherlands. K.Westerterp@HB.Unimaas.nl
Goris
Annelies H C
AH
D015982:Bias; D001834:Body Water; D017666:Deuterium Oxide; D015930:Diet Records; D004034:Diet Surveys; D002149:Energy Intake; D004734:Energy Metabolism / Q000502:physiology*; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D011939:Mental Recall; D015596:Nutrition Assessment; D009765:Obesity; D015203:Reproducibility of Results; D012650:Self Disclosure
D017666:Deuterium Oxide