Document Detail

Minimizing random error in dietary intakes assessed by 24-h recall, in overweight and obese adults.
MedLine Citation:
PMID:  17375109     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the minimum number of days of dietary intake interviews required to reduce the effects of random error (day-to-day variability in dietary intake) when using the multiple-pass, multiple-day, 24-h recall method. DESIGN: Cross-sectional study. SETTING: University research department. SUBJECTS: A total of 50 healthy non-smoking overweight and obese (body mass index=26-40 kg/m2) adult men and women aged 39-45 years completed the study. Participants were randomly selected from volunteers for a larger unrelated study. INTERVENTIONS: Each participant completed 10, multiple-pass, 24-h recall interviews on randomly chosen days over 4 weeks. The minimum number of record days was determined for each macronutrient (carbohydrate, fat, protein) and energy, for each gender, to obtain a 'true' (unobservable) representative intake from reported (observed) dietary intakes. RESULTS: The greatest number of days required to obtain a 'true' representative intake was 8 days. Carbohydrate intakes required the greatest number of days of dietary record among males (7 days), whereas protein required the greatest number of days among females (8 days) in this cohort. Sunday was the day of the week that showed greatest variability in macronutrient intakes. Protein (P<0.05) and fat (P<0.001) intakes were significantly more variable than carbohydrate on Sundays compared with weekdays, for both men and women. CONCLUSION: A logistically achievable 8 days of dietary intake interviews was sufficient to minimize the effect of random error when using the multiple-pass, 24-h recall dietary intake method. Sunday should be included among the dietary interview days to ensure a 'true' representation of macronutrient intakes. This method can be confidently applied to small cohort studies in which dietary intakes from different groups are to be compared or to investigations of associations between nutrient intakes and disease.
K A Jackson; N M Byrne; A M Magarey; A P Hills
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-03-21
Journal Detail:
Title:  European journal of clinical nutrition     Volume:  62     ISSN:  0954-3007     ISO Abbreviation:  Eur J Clin Nutr     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-04-02     Completed Date:  2008-07-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804070     Medline TA:  Eur J Clin Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  537-43     Citation Subset:  IM    
School of Health Sciences, University of South Australia, Adelaide, Australia.
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MeSH Terms
Body Mass Index
Cohort Studies
Cross-Sectional Studies
Diet Surveys
Dietary Carbohydrates / administration & dosage
Dietary Fats / administration & dosage
Dietary Proteins / administration & dosage
Energy Intake / physiology*
Mental Recall*
Nutrition Assessment*
Obesity / psychology*
Overweight / psychology*
Reproducibility of Results
Sensitivity and Specificity
Sex Distribution
Time Factors
Reg. No./Substance:
0/Dietary Carbohydrates; 0/Dietary Fats; 0/Dietary Proteins

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