Dietary Assessment Flashcards
Methodological considerations and limitations in Dietary Assessment
- Sources of dietary variations
- Individual, community and cultural-specific
issues - Intra-household food distribution,
Shared eating occasions and street food - Estimation of portion size
- Measurement errors in dietary assessment
Dietary assessment can be done at a ______ expressed in terms of nutrients and/or foods
national, household, or individual levels
Factors influencing diet variation
- Seasonal variation
- Variation in meal patterns
- Variation in HH composition
- Wide range of available foods
- Food consumption away from home
- Working patterns
- Special Days
- Disease states
Steps in assessment of food and nutrient intakes
- Measure food intake
- Convert foods to nutrients
- Estimate intakes of available nutrients
- Evaluate dietary of nutrient adequacy
Process assess risk of nutrient adequacy and not _____
nutritional status
Dietary assessment methods
- 24-hour food recall
- Weighed food record
- Food frequency questionnaire
- Dietary history
Aims to determine the mean intakes for
a group or population
24-hour food recall
24-hour food recall can be used for
for large-scale field studies
Estimates the distribution of intakes, and/or examines the usual diets and correlations of individual intakes
REPEATED/MULTIPLE 24-HOUR RECALL
Steps in conducting a 24-hour recall
- Quick list
- Forgotten foods
- Time and Occasion
- Detail Cycle
- Final Probe
Most precise method for assessing food intakes of individual
Weighed food record
This dietary assessment method is highly invasive and labor intensive
Weighed food record
Food frequency questionnaires
- List of foods
- Frequency-of-use
- SQ-FFQ
This method is used for counselling patients
Dietary history
This method does not rely on memory, but is invasive, expensive, and the respondent burden may be high.
Weighed record
Innovative methods in measuring food consumption
- Personal digital assistant
- Image-assisted method
- Mobile-based technologies
- Interactive computer and web-based technologies
- scan-ands-sensor-based technologies
This innovative method is used to register and self-monitor dietary intake
Personal digital assistant
This innovative method refers to any method that used images of food collected.
Image-assisted method
This innovative method involves the use of interactive dietary assessment programs installed on a computer
Interactive computer and web-based technologies
Interactive computer and web-based technologies are used for people with in what age group
Old age
This innovative method is designed to be memory-independent and entirely passive for participants
Scan-and-Sensor-based technology
For average intake of a group, _____ should be used for data collection
Single 24-recall
For determining proportion of population at risk, _______ should be used for data collection
Repeat 24-hr recalls/records at least a subsample (30-40 per stratum)
When are multiple-replicates of 24-hour recalls or FFQ/diet history used?
Level 3 or 4 objectives: Usual intakes of individuals for ranking or correlation
