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Validity of portion-size measurement aids: a review
Y S Cypel1, P M Guenther, G J Petot
1US Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center, Riverdale, MD 20737, USA.
Journal of the American Dietetic Association
|March 1, 1997
Summary
Portion-size measurement aids (PSMAs) show similar accuracy in food intake studies, but more research is needed. Guidelines for using these dietary assessment tools cannot yet be established due to data gaps.
Area of Science:
- Nutrition science
- Dietary assessment methodology
Background:
- Accurate food quantity estimation is crucial for dietary intake data quality.
- Existing guidelines for portion-size measurement aids (PSMAs) in research are underdeveloped.
- The validity of PSMAs in food intake studies requires further investigation.
Purpose of the Study:
- To review existing research on the validity of portion-size measurement aids (PSMAs).
- To identify research gaps concerning PSMA accuracy and application.
- To inform the potential development of guidelines for PSMA use.
Main Methods:
- Systematic review of research studies evaluating portion-size measurement aids.
- Analysis of data on food quantity estimates derived from various PSMAs.
- Identification of limitations and areas needing further research.
Main Results:
- Generally, statistically significant differences were not found between food quantity estimates from different PSMAs.
- Significant gaps exist in research regarding PSMA validity across diverse socio-demographic groups.
- Limited research addresses the impact of PSMAs on quantity estimates or user perceptions.
Conclusions:
- Current research is insufficient to establish definitive guidelines for PSMA use in clinical practice or research.
- Further research is necessary to address PSMA validity, usage effects, and reporting standards.
- Improved understanding of PSMAs is needed before comprehensive guidelines can be developed.
