Dietary Assessment Components in the NHANES

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Dietary Assessment Components in the NHANES
Centers for Disease Control and
Prevention National Center for Health Statistics
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NHANES Nutrition Assessments

• Physical Examination
• Anthropometric measurements
• Nutritional biochemistries and hematologies
• Dietary Assessment
• Dietary behavior
• Food security
• Nutrient intake and food consumption
• Physical Fitness and Physical Functioning

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NHANES Nutrition Assessments

• Physical Examination
• Anthropometric measurements
• Nutritional biochemistries and hematologies
• Dietary Assessment
• Dietary behavior
• Food security
• Nutrient intake and food consumption
• Physical Fitness and Physical Functioning

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Dietary Behavior Assessments

• Dietary supplements use
• Milk consumption patterns
• Salt use
• Breastfeeding practices
• Weight control practices
• Eating-out habits
• Use of special diets

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Dietary Behavior Assessments

• Vegetable consumptions
• Alcohol consumptions
• Meal patterns for elderly
• Poultry skin/Meat fat trimming
• Plain water consumptions
• Fish and shellfish consumptions

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Food Security Assessments

• Food security modules
• Low income family
• Household food security
• Individual food security
• Food programs participation

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Dietary Recall ComponentNHANES 1999-2001

• 24-hour recall information
• Day 1 100 sample
• Day 2 10 sample
• Eligible sample all ages
• Interview administration
• Bilingual dietary interviewers
• Proxy interview for children

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Dietary Interview Mode Evaluation Study (DIMES)
in NHANES 1999-2001

• Conducted on a subsample of NHANES 1999-2000
  primary sampling units (PSUs)
• To evaluate the operational feasibility of the
  telephone interview mode

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NHANES 1999-2001 and DIMES
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Dietary Recall Interview System NHANES 1999-2001

• Electronic recording form
• Structured interview format
• Multiple pass format
• Standardized food probes
• Additions to foods
• Combination type coding
• Flexible update options

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Dietary Recall Interview System NHANES 1999-2001

• Multiple Pass Format

Quick List
Time, Occasion and Place (includes Frequently
Forgotten Foods List)
Food Details
Final Review
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Quick List Screen
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Food Probe Screen
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Final Review Screen
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Dietary Recall Data Processing NHANES 1999-2001

• Electronic file transmittal
• FIAS coding
• Standardized coding guidelines
• USDA food codes
• Recipe modification option
• Market check procedures
• USDA 94-98 Survey Nutrient Database

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Dietary Recall Quality Control

• Completeness reliability review
• Online food probe review
• Electronic communications with interviewers
• Taped interviews
• Double coding
• Coder reports
• Field observation

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NHANES 1999-2000Dietary Public Release Files

• Total nutrient intakes file
• Individual foods file
• Dietary behavior questionnaire file
• Weight history questionnaire file

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NHANES 2002 Dietary Assessment

• 24-hour dietary recall (new USDA automated system)

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Quick List Screen
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Food Detail Screen
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NHANES 2002 Dietary Assessment

• 24-hour dietary recall (new USDA automated system)

• Second day recall on ALL persons (telephone)

• Food frequency (focused)
• General questions
• Supplements/medications (detailed)
• Food security

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Dietary Assessment Across NHANES Breadth and
Depth of Components
Other
Food security
Food program participation
Supplements
FFQ
24-hr recall
24-hour recall
supplements
food security