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Comparison of techniques for estimating nutrient intake: the Framingham Study.
B M Posner1, S S Martin-Munley, C Smigelski
1Office of the Director, School of Public Health, Boston University, Boston, MA.
Epidemiology (Cambridge, Mass.)
|March 1, 1992
Summary
Dietary assessment methods like 24-hour recalls and 3-day food records provide similar nutrient intake estimates for groups. Food frequency questionnaires may be less accurate for group means but useful for individual ranking.
Area of Science:
- Nutritional Epidemiology
- Dietary Assessment Methods
Background:
- Accurate nutrient intake estimation is crucial for public health research.
- Multiple dietary assessment methods exist, each with strengths and limitations.
Purpose of the Study:
- To compare nutrient intake estimates from three common dietary assessment methods.
- To evaluate the accuracy and utility of each method for group and individual assessments.
Main Methods:
- Comparison of 24-hour recall, 3-day food record, and food frequency questionnaire (FFQ) in 150 adults.
- Analysis of group mean differences and individual ranking correlations.
Main Results:
- 24-hour recall and 3-day records yielded similar group mean nutrient intake estimates (<10% difference).
- FFQ estimates differed significantly from recall and record methods, overestimating in women and underestimating in men.
- Individual nutrient intake correlations were modest across methods (r=0.08-0.68).
Conclusions:
- 24-hour recall and 3-day food records are interchangeable and preferred for group mean nutrient intake estimation.
- FFQs have limited utility for group means but may help rank individuals by usual intake.
- Development of short, population-specific diet assessment methods is needed.