title: BMI was found to be a consistent determinant related to misreporting of energy, protein and potassium intake using self-report and duplicate portion methods.
abstract: As misreporting, mostly under-reporting, of dietary intake is a generally known problem in nutritional research, we aimed to analyse the association between selected determinants and the extent of misreporting by the duplicate portion method (DP), 24 h recall (24hR) and FFQ by linear regression analysis using the biomarker values as unbiased estimates.
  
  
  
  For each individual, two DP, two 24hR, two FFQ and two 24 h urinary biomarkers were collected within 1·5 years. Also, for sixty-nine individuals one or two doubly labelled water measurements were obtained. The associations of basic determinants (BMI, gender, age and level of education) with misreporting of energy, protein and K intake of the DP, 24hR and FFQ were evaluated using linear regression analysis. Additionally, associations between other determinants, such as physical activity and smoking habits, and misreporting were investigated.
  
  
  
  The Netherlands.
  
  
  
  One hundred and ninety-seven individuals aged 20-70 years.
  
  
  
  Higher BMI was associated with under-reporting of dietary intake assessed by the different dietary assessment methods for energy, protein and K, except for K by DP. Men tended to under-report protein by the DP, FFQ and 24hR, and persons of older age under-reported K but only by the 24hR and FFQ. When adjusted for the basic determinants, the other determinants did not show a consistent association with misreporting of energy or nutrients and by the different dietary assessment methods.
  
  
  
  As BMI was the only consistent determinant of misreporting, we conclude that BMI should always be taken into account when assessing and correcting dietary intake.
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Laura
authors.initials: L
authors.lastname: Trijsburg
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Anouk
authors.initials: A
authors.lastname: Geelen
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Peter Ch
authors.initials: PC
authors.lastname: Hollman
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Paul Jm
authors.initials: PJ
authors.lastname: Hulshof
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Edith Jm
authors.initials: EJ
authors.lastname: Feskens
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Pieter
authors.initials: P
authors.lastname: Van't Veer
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Hendriek C
authors.initials: HC
authors.lastname: Boshuizen
authors.affiliation: 1Division of Human Nutrition,Wageningen University,PO Box 8129,6700 EV Wageningen,The Netherlands.
authors.forename: Jeanne Hm
authors.initials: JH
authors.lastname: de Vries
mesh_terms: D000328:Adult; D000368:Aged; D015992:Body Mass Index; D004034:Diet Surveys / Q000379:methods* / Q000706:statistics & numerical data; D004044:Dietary Proteins; D002149:Energy Intake; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D017419:Potassium, Dietary; D057566:Self Report; D055815:Young Adult
chemical_list: D004044:Dietary Proteins; D017419:Potassium, Dietary
keywords: Biomarkers of intake; Determinants of misreporting; Dietary intake assessment; Doubly labelled water; Duplicate portion