BPK 110 Lecture Notes - Lecture 2: Questionnaire, Standard Deviation, Observational Study

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LECTURE 2 EVALUTING NUTRION INFO.
Epidemiological studies
- Observational study
- Hypothesis tested thru observations
- Population-based research
Methods for Determining Intake Patterns in Research
- Observational methods
- Food diary
- 24 hour diet recall
- Diety history method
- Food frequency questionnaire (FFQ)
- Household budget surveys, food purchase/waste estimates
Experimental Studies
- Controlled condition
o Experimental/treatment group
o Control group (may receive placebo)
o Blind
o Double-blind
Study of Nutrition
- Biochem, molecular bio, comp. modelling
Nutritional Status
- Determine food intake
- Analyze nutrient intake
- Eval. Physical health
- Consider medical history
- Access w/ lab tests
Dietary Reference Intakes (DRI)
- Four DRIs
o Recommended dietary allowed (RDA)
2 standard deviation above EAR
Consumption of amt of nutrient needs to meet needs of 97% of
population
o Estimated average requirement (EAR)
Consumption of this amt of nutrients needs to meet 50% population
o Adequate intake
Nutrient intakes used as goal when no RDA exists; AL values approximate
amt of nutrient that sustains health
o Upper limit
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