National Health and Nutrition Examination Survey

NHANES 2019-March 2020 Convenience Sample Limited Access Data

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.
Data File NameDoc FileData FileDate Published
Cognitive Functioning CFQ_K_R Doc RDC Only April 2022
Demographic Variables DEMO_K_R Doc RDC Only December 2021
Diet Behavior & Nutrition - B24 Project DB24_K_R Doc RDC Only December 2021
Early Childhood - B24 Project EC24_K_R Doc RDC Only December 2021
Fluoride - Water FLDW_K_R Doc RDC Only December 2021
Folate Forms - Total & Individual – Washed RBCs FFMR_K_R Doc RDC Only May 2022
Functioning - Adult FNQA_K_R Doc RDC Only December 2021
Functioning - Child FNQC_K_R Doc RDC Only December 2021
Sex Steroid Hormone Panel - Serum TST_K_R Doc RDC Only December 2021
Standing Balance BAQ_K_R Doc RDC Only March 2022
Thyroid Profile - Serum THYD_K_R Doc RDC Only December 2021
Tuberculosis - Quantiferon TB Gold Plus TB_K_R Doc RDC Only January 2022
Volatile Organic Compounds - A-Pinene - Blood VCWB_K_R Doc RDC Only January 2022