National Health and Nutrition Examination Survey

2019-March 2020 Convenience Sample Limited Access Data

Related Pages
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
Fatty Acids - Washed RBCs FAR_K_R Doc RDC Only July 2023
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
Hemoglobin Variants HBVR_K_R Doc RDC Only March 2024
Infant Formula Database – Ingredient Information IFII_K_R Doc RDC Only April 2023
Infant Formula Database – Label Descriptor IFLD_K_R Doc RDC Only April 2023
Infant Formula Database – Nutrient Information IFNI_K_R Doc RDC Only April 2023
Infant Formula Database – Product Information IFPI_K_R Doc RDC Only April 2023
Infant Formula Questionnaire File IFQF_K_R Doc RDC Only April 2023
Iodine - Salt IODS_K_R Doc RDC Only February 2023
Salt Use SUQ_K_R Doc RDC Only February 2023
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
Content source: CDC/National Center for Health Statistics