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NHANES: A Potential Database for Risk Assessment. Clifford Johnson. Centers for Disease Control and Prevention National Center for Health Statistics. National Health and Nutrition Examination Survey (NHANES). Objective - PowerPoint PPT Presentation
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NHANES: A Potential Database for Risk
Assessment
Clifford Johnson
Centers for Disease Control and PreventionNational Center for Health Statistics
National Health and Nutrition Examination
Survey (NHANES)
Objective
To assess the health and
nutritional status of adults and
children in the United States
OP96S022
National Health and NutritionExamination Surveys
NHES I 1960-62 18-79 yearsNHES II 1963-65 6-11 yearsNHES III 1966-70 12-17 yearsNHANES I 1971-75 1-74 yearsNHANES II 1976-80 6 mo.-74 yearsHHANES 1982-84 6 mo.-74 yearsNHANES III 1988-94 2 mo. +NHANES 1999- All ages
Survey Dates Ages
OP96S025
• Continuous data collection beginning in 1999
• Multi-stage probability sample
• Annual national sample of 5,000 persons
• Detailed estimates of population subgroups requires two or more years
NHANES sample design
NHANES process
HomeExaminatio
n
Interview
MobileExaminatio
nCenter
Longitudinal Followup
Identification of sample persons
OP96S028
• Broad range of health conditions
• Health care coverage and need
• Environmental and occupational exposures
• Health behaviors
• Nutrition and dietary supplements
NHANES household interview
OP96S039
NHANES Mobile Exam Center
NHANES topics
• Cardiovascular disease
• Diabetes, lower extremity disease
• Bone status, osteoporosis
• Oral health
• Vision
• Hearing and balance
• Fitness and strengthOP96S035
NHANES topics
• Nutrition
• Anthropometry
• Mental health
• Risk behaviors
• Reproductive health
• Environmental exposures
• Infectious diseases
OP96S036
• Dietary nutrient intake
• Anthropometric measurements
• Nutritional biochemistries and hematologic tests
• Physical examination
• Interview
NHANES nutrition assessments
OP96S060
NHANES 1999-2001 Dietary Assessment
•24-hour dietary recall (automated )
•Second day recall on subset of persons
•Food frequency (focused)
•General questions
•Supplements/medications (detailed)
•Food security
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
MEC laboratory
•CBC and differential
•Pregnancy test
•Blood, urine and vaginal swab processing
•76 different vials of samples
•26 laboratories
•300 laboratory assays
Environmental exposure measures
•Lead
•Cadmium
•Mercury
•Pesticides
•Selenium
•Cotinine
•Urinary Iodine
•Volatile organic compounds
National Report on Human Exposure to Environmental
Chemicals
First report - 27 environmental chemicals including:
•Metals
•Cotinine
•Organophosphate pesticide metabolites
•Phthalate metabolites
Updated annually
Dietary data for future NHANES
• Continue collection of two recalls on all sample persons
• Pilot test in 2002 of a longer food frequency questionnaire
• Monitor respondent burden
• Balance competing needs --- usual intake, total intake (nutrients vs. foods), food safety, supplement use, DHKS, food programs and health components
NHANES web site
http://www.cdc.gov/nchs/nhanes.htm
OP96S058
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