Document Detail

Comparison of dietary assessment methods in a low-fat dietary intervention program.
MedLine Citation:
PMID:  11962245     Owner:  NLM     Status:  MEDLINE    
The food frequency questionnaire (FFQ) is commonly utilized for assessment of dietary fat intake, but its validity among individuals following a low-fat diet is unclear. We evaluated the agreement of nutrient estimates derived from FFQ, 24-h recall, and 3-day food records obtained from 104 participants in a randomized trial of a low-fat dietary intervention for women at elevated breast cancer risk. Comparisons were made for total calories, percent calories from fat, and total fat after 1 yr. Correlation was assessed using standard methods based on a null hypothesis of no agreement between instruments as well as by a methodology based on a null hypothesis that the instruments should be in agreement. With the use of standard methods, FFQ estimates for women on the low-fat diet were significantly correlated to records only for percent calories from fat (r = 0.39), whereas recall and record estimates were significantly correlated for all three dietary variables. Using the new method, we found no significant correlation between FFQ and either recalls or records for women following a low-fat diet but significant correlation between recall and record estimates for total calories (r = 0.67). Traditional correlation testing may overestimate the extent of agreement in dietary instruments among women on a low-fat diet. We found empirical support for the nontraditional method.
M S Simon; S Lababidi; Z Djuric; V Uhley; J Depper; C Kresge; D M Klurfeld; L K Heilbrun
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Nutrition and cancer     Volume:  40     ISSN:  0163-5581     ISO Abbreviation:  Nutr Cancer     Publication Date:  2001  
Date Detail:
Created Date:  2002-04-18     Completed Date:  2002-10-04     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7905040     Medline TA:  Nutr Cancer     Country:  United States    
Other Details:
Languages:  eng     Pagination:  108-17     Citation Subset:  IM    
Division of Hematology and Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA.
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MeSH Terms
Breast Neoplasms / prevention & control
Diet Records*
Dietary Fats / administration & dosage*
Energy Intake
Mental Recall
Middle Aged
Regression Analysis
Risk Factors
Grant Support
Reg. No./Substance:
0/Dietary Fats

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

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