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Validation of habitual energy intake
Dale A Schoeller1, Dale A Schoeller
1Nutritional Sciences, University of Wisconsin, 1415 Linden Drive, Madison 53706, USA. dschoell@nutrisci.wisc.edu
Public Health Nutrition
|March 14, 2003
Summary
The doubly labeled water method accurately measures energy expenditure, validating dietary intake assessments. This method reveals over a third of individuals underreport energy intake significantly.
Area of Science:
- Nutritional Science
- Biomarker Research
- Human Physiology
Background:
- Dietary assessment tools are crucial for understanding energy intake.
- Accurate measurement of energy expenditure is needed to validate these tools.
- The doubly labeled water (DLW) method offers a precise way to measure energy expenditure.
Purpose of the Study:
- To establish a framework for utilizing the DLW method.
- To measure energy expenditure for validating dietary intake instruments.
- To assess habitual energy intake using DLW as a biomarker.
Main Methods:
- Review and description of the DLW method.
- Application of DLW to measure energy expenditure.
- Comparison of self-reported energy intake with measured energy expenditure.
Main Results:
- The DLW method demonstrates high accuracy (1%) and precision (5-8%).
- Over 33% of participants underreported their energy intake by more than 25%.
- Significant discrepancies exist between reported intake and actual expenditure.
Conclusions:
- The DLW method is a highly accurate biomarker for energy intake.
- Despite costs and specialized equipment, DLW is valuable for research.
- Findings highlight potential underreporting issues in dietary assessments.