Dietary Assessment Components in the NHANES

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

2. N N 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

3. N N 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

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

5. Dietary Behavior Assessments • Vegetable consumptions • Alcohol consumptions • Meal patterns for elderly • Poultry skin/Meat fat trimming • Plain water consumptions • Fish and shellfish consumptions

6. Food Security Assessments • Food security modules Low income family Household food security Individual food security • Food programs participation

7. 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

9. 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

10. Sample persons screened and interviewed in household ½ randomly selected for afternoon or evening exam ½ randomly selected for morning exam Appointment made during exam for 24-hour recall by telephone 24-hour recall in-person during exam Recall by telephone 4-7 days after exam NHANES 1999-2001and DIMES

11. 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

12. 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

13. Quick List Screen

14. Food Probe Screen

15. Final Review Screen

16. 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

17. Dietary Recall Quality Control • Completeness & reliability review • Online food probe review • Electronic communications with interviewers • Taped interviews • Double coding • Coder reports • Field observation

18. NHANES 1999-2000Dietary Public Release Files • Total nutrient intakes file • Individual foods file • Dietary behavior questionnaire file • Weight history questionnaire file

19. NHANES 2002 Dietary Assessment • 24-hour dietary recall (new USDA automated system)

20. Quick List Screen

21. Food Detail Screen

22. 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

23. food frequency (FFQ) food program participation other diet-related 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