Document Detail

Relative validity of food intake estimates using a food frequency questionnaire is associated with sex, age, and other personal characteristics.
MedLine Citation:
PMID:  16424128     Owner:  NLM     Status:  MEDLINE    
We investigated the validity of food intake estimates obtained by a self-administered FFQ relative to weighed food records (WFR) and the extent to which demographic, anthropometric, and social characteristics explain differences between these methods. A community-based sample of 96 Australian adults completed a FFQ and 12 d of WFR over 12 mo. The FFQ was adapted to the Australian setting from the questionnaire used in the US Nurses' Health Study. Spearman rank correlation coefficients ranged from 0.08 for "other vegetables" to 0.88 for tea. Exact agreement by quartiles of intake ranged from 27% (eggs) to 63% (tea). Differences between FFQ and WFR regressed on personal characteristics were significantly associated with at least 1 characteristic for 20 of the 37 foods. Sex was significantly associated with differences for 17 food groups, including 5 specific vegetable groups and 2 "total" fruit and vegetable groups. Use of dietary supplements and the presence of a medical condition were associated with differences for 5 foods; age, school leaving age, and occupation were associated with differences for 1-3 foods. BMI was not associated with differences for any foods. Regression models explained from 3% (whole-meal bread) to 37% (for all cereals and products) of variation in differences between methods. We conclude that the relative validity of intake estimates obtained by FFQ is different for men and women for a large number of foods. These results highlight the need for appropriate adjustment of diet-disease relations for factors affecting the validity of food intake estimates.
Geoffrey C Marks; Maria Celia Hughes; Jolieke C van der Pols
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of nutrition     Volume:  136     ISSN:  0022-3166     ISO Abbreviation:  J. Nutr.     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-01-20     Completed Date:  2006-03-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404243     Medline TA:  J Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  459-65     Citation Subset:  IM    
School of Population Health, University of Queensland, Herston, Qld 4006, Australia.
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MeSH Terms
Age Factors
Diet Surveys*
Feeding Behavior*
Middle Aged
Questionnaires / standards*
Reproducibility of Results
Sex Factors
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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