NHANES has been conducted continuously since 1999, providing
an ongoing assessment of health, health-related behaviors,
nutrition, and environmental chemical exposures in the U.S.
population. Using a stratified, multistage, probability cluster
design, NHANES obtains a representative sample of the noninstitutionalized
civilian U.S. population (additional detail is
available at
NHANES has been conducted continuously since 1999, providingan ongoing assessment of health, health-related behaviors,nutrition, and environmental chemical exposures in the U.S.population. Using a stratified, multistage, probability clusterdesign, NHANES obtains a representative sample of the noninstitutionalizedcivilian U.S. population (additional detail isavailable at
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