Definition of Dietary
measurement of quantity of the individual foods consumed during one to several days OR pattern of food use
- Levels of objectives
- actual vs usual intake
- group vs individual interpretation
- Types of nutrients
Why measure diet?
- Assessing and monitoring food and nutrient intake (also: estimating exposure to food additives and contaminants)
- Formulating and evaluating government health and agricultural policy
- Conducting epidemiologic research, i.e. the relationships between diet and health
- Commercial purposes, i.e. developing advertising campaigns or new food products
Food Records: principle and uses
- Estimated Food Records
- Weighed Food Records (Weighed Diet Record, WDR)
Principle and Uses:
- Based on recording portion sizes of actual foods consumed by an individual, estimated using household measures or weighed using dietary scales.
- Weighed Food Records ideal for scientific and controlled studies in particular when diet counseling or correlations of intake with biological parameters are involved.
- Uses: research, multi-center epidemiological studies, for controlled metabolic studies.
- Weighed food record respondents must be motivated, numerate and illiterate.