National Health and Nutrition Examination Survey

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November 2024

Publications

October 2024

Publications

Data Release

 

September 2024

Publications

August 2021-August 2023 Data Release

Demographics Data

Examination Data

Laboratory Data

Questionnaire Data

Limited Access Data

Data Release – Other Cycles – Limited Access Data

 

July 2024

Data Release

Data Release – Limited Access Data

 

June 2024

Data Release

 

May 2024

Publications

Data Release

 

April 2024

Publications

 

March 2024

Data Release – Limited Access Data

 

January 2024

Data Release

 

November 2023

Publications

Data Release

 

October 2023

Updated Data

Documentation for the following datasets were updated to reflect the correct units of the reported analyte values for thyroid stimulating hormone (LBXTSH) as “µIU/mL”. No changes were made to the actual data points of any analytes in these datasets.

 

September 2023

Data Release

Laboratory Data

Updated Data

The following data sets were previously revised in March 2005 to correct urine cadmium for a possible interference from molybdenum oxide. Recently, it was brought to our attention that after the adjustment, urinary cadmium values below the limit of detection (LOD) were not assigned the imputed value of the LOD divided by the square root of 2. Urinary cadmium values (URDUCD) were updated for 276 records in the 1999-2000 file (LAB06HM), and 324 records in the 2001-2002 file (L06HM_B) to the imputed value of 0.0424 ng/ml. The comment codes for urinary cadmium (URDUCDLC) were updated accordingly as well.

 

July 2023

Data Release

Data Release – Limited Access Data

 

May 2023

Data Release

Laboratory Data

Updated Data

The following Ethylene Oxide datasets were previously revised in April 2022 to correct calibration bias. Recently, it was brought to our attention that the formula used to adjust the measurement values required logarithmic transformation. However, the formula was applied to data that were not uniformly log-transformed, rendering the revised measurement values released in April 2022 invalid. The updated datasets reflect the correct adjustments. Please refer to the analytic notes in the documentations accompanying the datasets for more details.

 

April 2023

Publication

Data Release

Data Release – Limited Access Data

 

March 2023

Data Release

 

February 2023

Data Release

Data Release – Limited Access Data

 

January 2023

Data Release

Data Release – Limited Access Data

 

December 2022

Publications

Updated Data

1999-2000 Perfluoroaokyl Chemicals – Serum (Surplus) (SSPFC_A) dataset was updated to adjust the rounding for the imputed value used for cases with results less than the Limit of Detection for 2-(N-Methyl-perfluorooctane sulfonamido) acetic acid (i.e., LBXMPAH) to be consistent with data released in other cycles. The updated imputed value was rounded to the second decimal place and changed from 0.20 ng/mL to 0.17 ng/mL. This update affect 36 records.

2003-2004 Polyfluoroalkyl Chemicals (L24PFC_C) dataset was updated to adjust the rounding for the Limit of Detection (LOD) and the imputed value used for cases with results less than LOD for 2-(N-Methyl-perfluorooctane sulfonamido) acetic acid (i.e., LBXMPAH) to be consistent with data released in other cycles. The updated LOD was rounded to the second decimal place and changed from 0.50 ng/mL to 0.52 ng/mL, and the imputed value used for cases below the LOD was updated from 0.30 ng/mL to 0.37 ng/mL. This update affected 1532 cases with LBXMPAH values below the original LOD, and identified 57 additional cases below the updated LOD (0.50< LBXMPAH<0.52) thus had their data replaced with imputed value as well. In addition, coding error was identified and corrected for LBDMPAHL for one record.

 

November 2022

Publications

Data Release

 

October 2022

Data Release

Data Release – Limited Access Data

Updated Data

The summary ambient light (lux) measures (i.e., PAXLXSH) previously included in the following Physical Activity Monitor (PAM) Minute Summary Files were erroneously described as the ‘sum’ of lux measures at the minute level whereas the values reported are the ‘mean’ lux measures for the minute. The files were updated with the variable PAXLXSH renamed as PAXLXMM and description corrected. No change was made to the data points reported. In addition, the descriptions for the codes associated with the quality check flags were also updated to clarify the data issues denoted by these flags.

The documentations for the following Physical Activity Monitor – Raw Data 80hz Files were updated to clarify the data issues described in the codes associated with the quality check flags. No change was made to the data points reported.

 

September 2022

Publications

Data Release

 

August 2022

Publications

Data Release

 

July 2022

Data Release

Updated Data

The NHANES Dietary Supplement Databases were updated to reflect the additional supplements reported during the 24-hour recall of dietary supplement use from the 2017-March 2020 pre-pandemic sample and corrections of previous entry errors.

The following 30-Day Dietary Supplement Use datasets from the 2017-March 2020 pre-pandemic sample were updated to reflect the corrections of the Dietary Supplement Databases. This update affected 124 records in the Individual Dietary Supplements (P_DSQIDS) file, and 65 records in Total Dietary Supplements (P_DSQTOT) file.

 

June 2022

Data Release

 

May 2022

Publications

Data Release

Data Release – Limited Access Data

Updated Data

The following 2017-2018 Hepatitis datasets were updated to include data inadvertently omitted from previously release. A total of 38 records were affected for dataset HEPA_J, 39 records affected for HEPB_S_J, 1 record for HEPBD_J, 5 records for HEPC_J, and 41 records for HEPE_J.

 

April 2022

Data Release

Data Release – Limited Access Data

Updated Data

The following Ethylene Oxide datasets were updated to correct a systematic bias caused by a calibration error to the measurement of ethylene oxide (i.e., LBXEOA). An algebraic correction based on a regression equation was applied to the original LBXEOA values and released in these files. Please refer to the analytic notes in the documentations accompanying the datasets for more details. No other data points in these files were changed.

The 2017-2018 Organophospate Insecticides – Dialkyl Phosphate Metabolites – Urine (OPD_J) file was originally released for the one-third subsample of examined participants aged 6 years and older. It has been updated to include data from the additional target group of participants aged 3-5 years. No changes to the data points previously released.

The 2011-2012 Physical Activity Monitor – Raw data 80hz (PAX80_G) files were updated to include hourly activity data from 2 participants (SEQN = 63347 and 65108) whose data were inadvertently omitted from previously release.

 

March 2022

Data Release

Data Release – Limited Access Data

Withdrawn Data

These datasets have been temporarily withdrawn from the NHANES website to correct a calibrator bias.

 

February 2022

2017-March 2020 Pre-Pandemic Sample Data Release

Questionnaire Data

Data Release – Limited Access Data

Updated Data

The following urinary total arsenic datasets were updated to include the comment code variable, URDUASLC, indicating whether the result was below the lower limit of detection.

The Food Security questionnaire datasets from the 2015-2016 cycle (FSQ_I & FSQ_I_R) were updated to correct errors in the values for FSQ162 in 151 records, FSQ760 in 232 records, and/or FSD760N in 119 records.

The Food Security questionnaire datasets from the 2017-2018 cycle (FSQ_J & FSQ_J_R) were updated to correct errors in the values for FSQ162 in 136 records, FSQ760 in 166 records, and/or FSD760N in 51 records. In addition, data from 2 records (SEQN = 96475 & 95929) inadvertently omitted from previously release were added to the file.

 

January 2022

2017-March 2020 Pre-Pandemic Sample Data Release

Examination Data

Dietary Data

Questionnaire Data

Limited Access Data

2019-March 2020 Convenience Sample Data Release

Limited Access Data

Data Release – Other Cycles

Data Release – Limited Access Data

Data Release – NNYFS

Examination Data

Limited Access Data

 

 

What’s New Archive: 2005–2021