Document Detail

The prevalence and impact of 'atypical' days in 4-day food records.
MedLine Citation:
PMID:  10767897     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To understand how days with atypical food intake affect estimates of usual nutrient intake from 4-day food records. PARTICIPANTS/SETTING: Secondary analyses of 4-day food records (4DFRs) (n = 2,560) collected from 1,090 women, aged 50 to 79 years, who participated in the Women's Trial Feasibility Study in Minority Populations, a randomized dietary intervention trial. DESIGN: Food records were classified as atypical if participants marked one or more day's food intake as "more than usual" or "less than usual." Total amounts and nutrient densities (percent of energy or grams per 1,000 kcal) were examined for all macronutrients, fiber, vitamin C, beta carotene, and calcium. STATISTICAL ANALYSIS: Contingency tables were used to examine associations of demographic characteristics with the likelihood of completing a 4DFR with atypical intake days. Analysis of variance was used to test whether nutrient intake differed among records with and without atypical days. Student t tests were used to identify any differences in total energy and percent energy from fat among typical and atypical intake days. RESULTS: Approximately 16% of records included at least 1 atypical day. Reporting less-than-usual intake was associated with younger age, higher income, and higher body mass index. Black women were less likely to report more-than-usual intake than whites and Hispanics. Records with less-than-usual intake had lower intakes of all nutrients analyzed except alcohol; however, there were no differences in nutrient densities. Records with more-than-usual intake had higher intakes of alcohol and all nutrients except beta carotene and vitamin C, with higher nutrient density measures of alcohol and decreased nutrient density measures of protein, vitamin C, and fiber. CONCLUSIONS: Atypical intake days are common in 4DFRs and they have a large effect on mean total intakes of most nutrients. APPLICATIONS: It is important for researchers to collect information on atypical intake days included in a 4-day food record. Strategies are needed to incorporate information on atypical intake days when analyzing and interpreting research results.
M R Craig; A R Kristal; C L Cheney; A L Shattuck
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the American Dietetic Association     Volume:  100     ISSN:  0002-8223     ISO Abbreviation:  J Am Diet Assoc     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-05-03     Completed Date:  2000-05-03     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7503061     Medline TA:  J Am Diet Assoc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  421-7     Citation Subset:  AIM; IM    
Fred Hutchinson Cancer Research Center, Seattle, Wash. 98109, USA.
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MeSH Terms
African Americans
Alcohol Drinking
Ascorbic Acid / administration & dosage
Body Mass Index
Calcium, Dietary / administration & dosage
Diet Records*
Dietary Carbohydrates / administration & dosage
Dietary Fats / administration & dosage
Dietary Fiber / administration & dosage
Dietary Proteins / administration & dosage
Educational Status
European Continental Ancestry Group
Hispanic Americans
Middle Aged
Randomized Controlled Trials as Topic
Social Class
beta Carotene / administration & dosage
Grant Support
Reg. No./Substance:
0/Calcium, Dietary; 0/Dietary Carbohydrates; 0/Dietary Fats; 0/Dietary Proteins; 50-81-7/Ascorbic Acid; 7235-40-7/beta Carotene

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

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