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NCHS

What's New

! Update on NHANES Dietary Data: Focus on Collection, Release, Analytical Considerations, and Uses to Inform Public Policy.
Adv Nutr. 2016 Jan 15;7(1):121-34. doi: 10.3945/an.115.009258. Print 2016 Jan. Review.

! Deadlines for Proposals for 2019-2020 Survey Content [PDF – 80 KB]

! Deadline for Proposals for 2019-2022 Sample Design Changes [PDF – 93 KB]

 

June 2017

Data Release

Updated Data

The Toxoplasma gondii data have been updated to include the addition of IgM antibody and IgG Avidity testing to increase the research potential of the Toxoplasma data.

 

May 2017

Publications

Updated Data

The variable SSTOXAV, Toxoplasmosis IgG Avidity, is being removed from the 2011-2012 data file because this variable is related to Toxoplasmosis IgM antibody which is not being released at this time due to quality control concerns.

Withdrawn Data

The UVOC_G and UVOCS_G datasets will be temporarily removed from the NHANES website for correction, due to lot-to-lot variation of standard materials.

 

April 2017

Publications

Data Release

Withdrawn Data

Polycyclic Aromatic Hydrocarbons (PAH) – Special Sample (PAHS_H) in the 2013-2014 cycle will be temporarily withdrawn due to missing samples in the dataset. The samples will be analyzed, and the dataset will be corrected and released at a later date.

 

March 2017

Publications

Data Release

Updated Data

The physical activity data was updated to clarify a few records where yes was originally reported for an activity, but the time given for the activity was zero minutes. The activity was set to no for these records.

 

February 2017

Data Release

Updated Data

The volatile toxicant questionnaire items were removed from the previously released 2013-2014 Volatile Organic Compounds and Trihalomethanes/MTBE – Blood (VOCWB_H) dataset. The questionnaire data are now released in a separate dataset, Volatile Toxicant (VTQ_H), in the Questionnaire Section of the NHANES website. None of the previously released data was changed in either dataset.

 

January 2017

Publications

Data Release

 

December 2016

Data Release

Data Release – Limited Access Data

Updated Data

The DXA whole body file was updated to include two overall imputation indicator variables that indicate whether bone (DXITOTBN) or soft tissue data (DXITOTST) were imputed for at least one body subregion.

 

November 2016

Data Release

Updated Data

The Physical Functioning (PFQ_H) file has been updated to include participants 3 to 4 years of age and an additional question (PFQ033) on use of special equipment.

The t,t-Muconic acid (URXMUCA) data were withdrawn from the Urinary Volatile Organic Compounds datasets (UVOC_G and UVOCS_G) in the NHANES 2011-2012 cycle, due to an observed issue with the internal standard transition used for quantitation. It was determined that the internal standard quantitation scheme used was not consistent during the 2011-2012 cycle, and the data could not be recalculated, even after the issue was identified and corrected. A detailed analytical note has been included in the dataset. The documentation file and laboratory procedure manual have been updated to reflect the withdrawal of all URXMUCA data.

 

October 2016

Data Release

Data Release – Limited Access Data

Updated Data

The LOD values were corrected and the data was corrected to report out 2 decimal places.

The LOD values were corrected in the document and the method file (SOP) was updated. No changes were made to the data.

 

September 2016

Data Release

Updated Data

Electrolytes – Home Urine Collection (HULT_H_R) and Kidney Marker – Home Urine Collection (HUKM_H_R) datasets in the 2013-2014 Limited Access Data were updated to include two new variables: URDDBUHM – number of days between the day of the morning home urine collection and the first 24-hour urine collection; and URDDBUHE – number of days between the day of the evening home urine collection and the first 24-hour urine collection.

The Albumin & Creatinine – Urine data of 2011-2012 and 2013-2014 have been updated to include a new variable: URDACT (Albumin Creatinine Ratio).

The Personal Care and Consumer Product Chemicals and Metabolites (EPHPP_H) dataset in the 2013-2014 cycle has been updated to include two new variables: URXBPF (Bisphenol F) and URXBPS (Bisphenol S).

The Herpes I and II data has been updated to update the variable HSV1. After further review of the original methodology, all the individuals who had previously been coded as indeterminate or missing are now coded as negative.

The documentation and data file Smoking – Cigarette Use (SMQ_H 2013-2014) was updated to include cigarette brand and associated variables.

 

August 2016

Publications

Data Release

Data Release – Limited Access Data

Updated Data

Data documentation and/or method documents have been updated for the files below, as indicated. No changes or corrections have been made to the data.

The insulin was performed 2005-2009 using the Mercodia ELISA assay and was switched in late 2009 to a Roche chemiluminescent immunoassay performed on the Elecsys 2010 analyzer. A crossover study was performed between the two methods. To trend 1999-2012 serum insulin, a “forward” fractional polynomial regression was added to the analytic note to derive 2011-2012 Roche-equivalent insulin values from the measured Mercodia insulin values from NHANES 2005-2008. See the analytic note on “change in methods for serum insulin.”

There was a change in late 2009 from the Mercodia to the Elecsys insulin method. For 2009-2010, a new Mercodia ELISA insulin method file was added in addition to the Elecsys 2010 insulin method file. See the lab methods Insulin-Mercodia ELISA and Insulin-Elecsys 2010 Immunoassay.

The insulin was performed 2003-2004 using the Tosoh immunoenzymometric assay and was switched in 2005-2006 to a Mercodia ELISA assay. A crossover study was performed between the two methods. To trend 2003-2006 serum insulin, a “forward” linear regression was added to the analytic note to derive Mercodia-equivalent insulin values for NHANES 2005-2006 from measured Tosoh insulin values measured in 2003-2004. See the analytic note on “Insulin regression equation to compare 2005-2006 data and 2003-2004 data.”

The insulin was performed 1999-2002 using the Pharmacia RIA assay and was switched in 2003-2004 to a Tosoh immunoenzymometric assay. A crossover study was performed between the two methods. To trend 1999-2004 serum insulin, a “backward” linear regression was added to the analytic note to derive Pharmacia-equivalent insulin values for NHANES 1999-2002 from measured Tosoh insulin values measured in 2003-2004. See the analytic note on “Comparison of NHANES 2003-2004 to NHANES 1999-2002 Insulin Values.”

 

July 2016

Publications

Data Release

June 2016

Data Release

Data Release – Limited Access Data

May 2016

Data Release

Data Release – Limited Access Data

Updated Data

The document of DEET and Metabolites (DEET_E 2007-2008) was updated to include the method file.

 

April 2016

Data Release

 

March 2016

Publications

Data Release

Data Release – Limited Access Data

Updated Data

The 24-Hour Urine Collection Data Processing and laboratory data files have been updated. The sample size and appropriate sample weights were revised and two variance unit variables were added to all 24-Hour Urine Collection data files (UR1_H_R, UR2_H_R, U1LT_H_R, U2LT_H_R, HULT_H_R, U1IO_H_R, U2IO_H_R, U1KM_H_R, U2KM_H_R, HUKM_H_R).

Total Cholesterol and HDL-Cholesterol are being updated to include an additional laboratory method file for each dataset, due to a change in instrumentation during the 2013-2014 cycle. The Roche/Hitachi Modular P Chemistry Analyzer method file is being added to accompany the Cobas 6000 Chemistry Analyzer method file for both datasets. Two method files will now be made available under the “Laboratory Method Files” section for total cholesterol, HDL-cholesterol, and triglyceride in the Doc File of each dataset.

The 2013-2014 Taste and Smell questionnaire (CSQ) data file has been updated to include two audiometry variables: a history of repeated ear infections (AUQ136) and a history of ear tube placement (AUQ138).

 

February 2016

Publications

Data Release

Archive – What’s New

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