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« Return to Questionnaires, Datasets and Related Documentation page These datasets are not released to the public. However, secure, on-site access is granted through NCHS's Research Data Center (RDC) to guarantee the confidentiality of the survey participants. The documents below are provided to help analysts determine if these NHANES datasets contain variables relevant to their analyses before submitting an application to use the RDC.

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Please check the What's New page for updated information on NHANES data releases.