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National Health and Nutrition Examination Survey

What's New Archive

2011

 

December 2011

 

Publications
New
Limited Access Documentation

 

November 2011

 

Announcements
Publications
New
Limited Access Documentation
Updated
  • Glycohemoglobin cross-over study regression equation for 2005-2006 (GHB_D) and 2003-2004 (GHB_C) should not be used for trend analyses. Read the Advisory for Glycohemoglobin (A1c) Data [PDF – 26 KB]
  • Glycohemoglobin (GHB_E 2007-2008)
  • Glycohemoglobin (GHB_F 2009-2010)
    Glycohemoglobin results for 2007-2008 (GHB_E) and 2009-2010 (GHB_F) have been withdrawn from release until further evaluation can be completed.

 

October 2011

 

Publications
New
Limited Access Data Documentation
Updated

 

September 2011

 

Publications
New
Limited Access Data Documentation
Updated

NHANES 2007-2008 subsample weights have been revised to correct for the misspecification of domains used for calculating the sub-sample weights. The following datasets have been updated with these revised weights:

 

August 2011

 

Publications
New
Updated

Some results reported previously have been changed or removed due to improvements in analytical measurement or recognition of an analytical issue (e.g., the presence of an interference) that produced results of inadequate quality.

 

July 2011

 

Announcement

The final course of the NHANES Dietary Tutorial is published online. The dietary tutorial is a major supplement to the existing NHANES Web Tutorial and provides information and instructions specific to dietary data and analyses. The first course, Dietary Data Orientation, gives an overview of the dietary data, provides roadmaps to the complex data structure and contents, and orients users to the NHANES website and its resources for dietary data analysis. The second course, Preparing a Dietary Analytic Dataset, provides step-by-step instruction from locating and downloading variables, to merging and appending, formatting, and saving datasets. Basic Dietary Analyses demonstrates how to perform some of the most frequently requested analyses of NHANES dietary data. The latest addition, Advanced Dietary Analyses, describes techniques for estimating usual intake of dietary and supplement intake, how dietary intakes vary among individuals, and how individual intakes relate to other factors.

 

June 2011

New
Updated

The free T4 (FRT4) assay results have been added to SSNH4THY dataset.

 

May 2011

New

 

April 2011

Publications
New
Updated

The 2007-2008 dietary supplement use 30-day files have been updated to include 33 new nutrients/dietary component variables and given new, descriptive names. The new files still include all variables in past cycles. The changes are described in further detail here: Changes to the 2007-2008 NHANES Dietary Supplement files.

The results from four chemicals - 2,4,5 Trichlorophenol, 2,4,6-Trichlorophenol, 2,5 Dichlorophenol, and ortho-Phenylphenol - have been withdrawn due to unacceptable levels of calibration bias. The results for these chemicals were also removed from the website version of the National Report on Human Exposure to Environmental Chemicals.

The Diabetes (DIQ_D) and (DIQ_E) data files have been updated to correct the A1C values (DIQ280).

 

March 2011

Publications
New
New Limited Access Documentation
Updated

The values for SSNO3, SSXSCN, and SXUP8 have been modified.

A new variable, URXUCR, has been added to the dataset, and the values of URXUP8 have been modified.

 

January 2011

Publications
New Limited Access Documentation

 

2010

 

December 2010

Publications
Announcements
  • NHANES 50th Anniversary page
    Ending the year-long celebration of NHANES 50th Anniversary, the 50th Anniversary webpage has been updated. From this page, you will be able to meet the DHANES directors, listen to the NHANES Story, take a virtual tour of the MEC, peruse recent news articles or newsletters, or reflect on the 50 significant contributions NHANES made in its first five decades.

 

November 2010

Announcements
Publications
New
New Limited Access Documentation
Updated

The purpose of this revised note is to inform users that serum 25-hydroxyvitamin D (25(OH)D) data from NHANES 2003-2004 and 2005-2006 have been adjusted for assay drifts and replaced previous 25(OH)D files. In addition, this note modifies the previous analytical note about issues that should be addressed when analyzing 25(OH)D data from NHANES 2000-2006 and NHANES III (1988-1994).

Read the Revised Analytical Note for NHANES 2000-2006 and NHANES III (1988-1994) 25-Hydroxyvitamin D Analysis [PDF - 32KB]

The Hepatitis C RNA variable was added to L02_B and LAB02.

 

October 2010

Publications
New
New Limited Access Documentation

 

September 2010

Publications
New
New Limited Access Documentation
Updated

The TRIGLY_E documentation has been re-released without references to Apolipoprotein B.

 

August 2010

New
New Limited Access Documentation
Updated

Nutrient values have been updated to reflect the USDA National Nutrient Database for Standard Reference, Release 22, Errata for several fatty acids in 2% reduced fat milk (Agricultural Research Service, Nutrient Data Laboratory, August 10, 2010).

These files have been updated to include all dietary supplements reported from 1999-2008.

These files have been updated to include all dietary supplements reported from 1999-2008.

These files have been updated to include all dietary supplements reported from 1999-2008.

These files have been updated to include all dietary supplements reported from 1999-2008.

 

July 2010

New
New Limited Access Documentation
Updated

 

June 2010

Publications
New
New Limited Access Documentation
Updated

Serum Creatinine, Alkaline Phosphatase, Calcium and Sodium have been added to the initial release of BIOPRO_E.

  • Surplus Sera: Racial/Ethnic Variation in Sex Steroid Hormone Concentrations Across Age In US Men (SSCHL_A 1999-2000)
  • Surplus Sera: Racial/Ethnic Variation in Sex Steroid Hormone Concentrations Across Age In US Men (SSCHL_B 2001-2002)
  • Surplus Sera: Racial/Ethnic Variation in Sex Steroid Hormone Concentrations Across Age In US Men (SSCHL_C 2003-2004)

These data files have been temporarily removed for further review and will be reposted at a later date.

 

May 2010

New
Updated

The lowest detection value for folate was set to 0.18 pmol/ml.

The Methodology section of the documentation were updated.

 

April 2010

Publications

 

New

 

Updated

 

March 2010

Publications

 

New Limited Access Data Documentation

 

Updated

 

February 2010

New

 

Updated

 

January 2010

New

 

New Limited Access Data Documentation

 

Updated

 

2009

 

December 2009

New

 

Updated

The updated BIX data file contains bioimpedance spectroscopy (BIS) multi-frequency data on resistance, reactance, extracellular fluid, intracellular fluid, total body water, and body composition for individuals 8-49 years of age. There are differences in variable counts between this data release and the previous release, which contained only the resistance and reactance frequency data. Differences in the variable counts and file content are described in the Data Processing and Editing section of the documentation.

The limit of detection values of luteinizing hormone in the SSNH3HRM dataset were corrected.

 

November 2009

Documentation for Datasets Available through the Research Data Center

 

Updated

 

October 2009

New

 

Documentation for Datasets Available through the Research Data Center

 

Updated
  • Lab 6 - Vitamin C (L06VIT_C 2003-2004)
    The Analytical Notes were added to the documentation.

 

September 2009

New

First Release of 2007-2008 Data

 

Documentation for Datasets Available through the Research Data Center

 

Updated

The Demographics files were updated to include the period of exam (season) variable.

Glucose datasets and documentations from 1999 to 2006 are updated to rename the weight variable(s) from WTSFA2YR to WTSAF2YR.

 

August 2009

 

New

 

Updated

 

July 2009

 

Publications

 

New

 

Updated

  • Dietary Supplement Use (DSQ_D 2005-2006)
    The 2005-2006 dietary supplement public use files were updated. An FDA approved prescription medication (Lovaza) was inadvertently included in the Dietary Supplements public use files. Records for survey participants who reported taking Lovaza in the 2005-2006 survey were removed from the Dietary Supplements file and added to the Prescription Medications file.
  • Lab 31 Polyaromatic Hydrocarbons (L31PAH_C 2003-2004)
  • PHPYPA Urinary Phthalates (PHPYPA_B 2001-2002)
  • PHPYPA Urinary Phthalates (PHPYPA 1999-2000)
    Comparisons of methods used in NHANES 1999-2000 and 2001-2002 to currently used methods (starting with NHANES 2003-2004) for the measurement of polycyclic aromatic hydrocarbon metabolites (OH-PAHs) were conducted. Because problems were discovered with the methods, some PAHs analytes have been removed.
    From PHPYPA 1999-2000: URXP03, URXP04, URXP05, URXP06, URXP07, URXP08, URXP10, URXP11, URXP12, URXP13, URXP14, URXP15, URXP16.
    From PHPYPA_B 2001-2002: URXP08, URXP11, URXP12, URXP13, URXP14, URXP15, URXP16, URXP17, URXP18, URXP19, URXP20, URXP21, URXP22, URXP24.
    From L31PAH_C 2003-2004: URXP08, URXP11, URXP12, URXP13, URXP14, URXP15, URXP16, URXP20, URXP21, URXP22, URXP24.
  • Lab 06 Methylmalonic Acid (L06_B 2001-2002)
    The method file was revised with the correct graphs.
  • Dietary Supplement Use (DSQ 1999-2000)
    The 1999-2000 Dietary Supplements public use files were updated. Fluoride products (except those in topical gel or cream forms) were inadvertently included in the Prescription Medication public use files. Records for survey participants who reported taking sodium fluoride in the 1999-2000 survey were moved to the Dietary Supplements file.

 

June 2009

 

New

Documentation for Datasets Available through the Research Data Center

 

Updated

 

May 2009

 

Publications

New

Updated

The purpose of this note is to inform users of serum 25-hydroxyvitamin D (25(OH)D) data from NHANES about two issues that should be addressed when analyzing these data. First, users are cautioned about making direct comparisons between serum 25-hydroxyvitamin D measurements from NHANES 2000-2006 (i.e., publicly released data for 2001-2006 and controlled-access data for 2000) and measurements obtained in NHANES III (1988-1994). NHANES III 25(OH)D data must be adjusted in order to make a valid comparison to the 2000-2006 NHANES survey years. Second, data users should also be aware that the 25(OH)D data from the 2000-2006 NHANES were most likely affected by drifts in the assay performance over time.

Read the complete Analytical Note for NHANES 2000-2006 and NHANES III (1988-1994) 25-Hydroxyvitamin D Analysis [PDF - 28 KB]

 

April 2009

 

Publications

New

 

March 2009

 

Announcements

 

New

 

Updated

 

February 2009

 

New

 

NHANES Dietary Tutorial - Basic Dietary Analyses Available Now


The three courses of the NHANES Dietary Tutorial are published online. The dietary tutorial is a major supplement to the existing NHANES Web Tutorial and provides information and instructions specific to dietary data and analyses. The first course, Dietary Data Orientation, gives an overview of the dietary data, provides roadmaps to the complex data structure and contents, and orients users to the NHANES website and its resources for dietary data analysis. The second course, Preparing a Dietary Analytic Dataset, provides step-by-step instruction from locating and downloading variables, to merging and appending, formatting, and saving datasets. The latest addition, Basic Dietary Analyses, demonstrates how to perform some of the most frequently requested analyses of NHANES dietary data. Additional modules on advanced dietary analyses will be released later in the year.

 

NHANES Web Tutorial - Preparing an Analytic Dataset Course Now Features Stata


A Stata track for the Preparing an Analytic Dataset course of the Continuous NHANES Web Tutorial is now on-line. Given the increasing number of Stata users, the NHANES tutorial team added a Stata track to the course's SUDAAN and SAS survey procedures tracks. The Stata track of Preparing an Analytic Dataset course provides instructions on importing SAS .xpt files to Stata, appending and merging data files, cleaning and recoding variables, formatting and labeling variables, and saving a Stata dataset.

Updated

 

January 2009

 

New

 

Now Available: Documentation for Datasets Available in the Research Data Center (RDC)

In an effort to help analysts determine if NHANES datasets contain variables relevant to their analyses before submitting an application to use the RDC, documentation for several limited access datasets is now available through the NHANES website. Currently, documentation for the 1999-2004 Diagnostic Interview Schedule for Children (DISC), 1999-2004 Los Angeles Demographic, and 1999-2004 Youth Conduct Disorder datasets is available. Documentation for more limited access datasets will be released in upcoming months.

 

To locate the limited access dataset documentation, go to a survey data page, and click the Limited Access link. Direct links to the pages have also been provided below.

 

Updated

  • Demographic (2005-2006)
    The Demographics public release file includes information that was collected using the Sample Person and Family Demographics question­naires. An educational attainment variable (DMDEDUC3) was added to this updated Demographics file to provide consistency with the NHANES 1999-2004 Demographics files. An earlier version of the educational attainment variable (DMDEDUC1) has been removed from the 2005-2006 file. 
  • Demographic (2003-2004)
  • Demographic (2001-2002)
  • Demographic (1999-2000)
    EDUCATIONAL ATTAINMENT: Five educational attainment variables are included the Demographics File. Three of the education variables target survey participants. Two other education variables provide information about the educational attainment of the household reference person (DMDHREDU) and the household reference person’s spouse (DMDHSEDU), when applicable. A brief description of the three survey participant educational attainment variables follows.

    The Demographics File contains two variables that provide additional information on the educational attainment level of survey participants. Educational attainment information for persons 6 through 19 years of age is included in DMDEDUC3. Detailed educational attainment information for adults who are 20 years of age and over is reported in DMDEDUC2.

    In addition, DMDEDUC is a three-category variable that groups ALL survey participants 6 years of age and over into one of three educational attainment groups: 1) less than high school education attainment, 2) high school graduate (has a high school diploma or high school equivalency diploma such as a General Educational Development/GED), or 3) has more than a high school education. DMDEDUC collapses categories from the other two education variables, and is retained in the file for the convenience of DHANES tutorial users. 
  • Lab 28 Dioxins (LAB28POC 1999-2000)
    Due to a miss-assignment of the concentration of purchased standard material, the data for beta-hexachlorcyclohexane serum levels in the Lab 28 Dioxins data file (LAB28POC) for the period 1999-2000 should be multiplied by 0.644. 
  • Lab 26 Urinary Organophosphate Insecticides: Diakyl Phosphate Metabolites (26OPD_C_2003-2004) has been temporarily withdrawn from release. Some values were incorrectly reported for the variables URXOP1-URXOP6. A corrected dataset and documentation will be posted.

 

2008

 

December 2008

 

Publications

New

 

NHANES III Anthropometric Procedures Video Now Online

The instructional video of the NHANES III Anthropometric Procedures is now available through the NHANES website. It demonstrates how body measurements are made during the examination. The video is in eight, captioned segments and uses Windows Media Player. View the NHANES III Anthropometric Procedures video.

Updated

 

October 2008

 

Publications

New

 

NHANES Dietary Tutorial Available Now

The first two courses of the NHANES Dietary Tutorial are published online. The dietary tutorial is a major supplement to the existing NHANES Web Tutorial and provides information and instructions specific to dietary data and analyses. The first course, Dietary Data Survey Orientation, gives an overview of the dietary data, provides roadmaps to the complex data structure and contents, and orients users to the NHANES website and its resources for dietary data analysis. The second course, Preparing a Dietary Analytic Dataset, provides step-by-step instruction from locating and downloading variables, to merging and appending, formatting, and saving datasets. Courses covering basic and advanced data analyses are currently under development.  

NHANES Web Tutorial - NHANES Analyses Course Now Features Stata

A Stata track for the NHANES Analyses course of the NHANES Web Tutorial is now on-line. Given the increasing number of Stata users, the NHANES tutorial team added a Stata track to the course's SUDAAN and SAS survey procedures tracks. The NHANES Analyses course provides instructions on how to conduct the most frequently used statistical functions. Additional instructions on how to prepare an analytic dataset using Stata software will be forthcoming.

Updated

  • Demographic (2003-2004)
  • Demographic (2001-2002)
  • Demographic (1999-2000)
    The NHANES Demographic Variables and Sample Weights files have been updated for the 1999-2000, 2001-2002, and 2003-2004 cycles. New variables include citizenship status, school attendance, household size, more detailed education variables, and variables about the household reference person. Additionally, age and place of birth variables have been corrected in a few cases. No age has been changed by more than 2 months.

 

September 2008

 

Publications

 

New

 

Updated

  • Drug Information (RXQ_DRUG 2003-2004)
    The NHANES Drug Information file has been updated to include data for prescription medications through 2005-2006. This file may be used with the NHANES 2003-2004 and 2005-2006 prescription medication files.

 

August 2008

 

New

 

Updated

 

July 2008

 

New

 

Updated

 

June 2008

 

New

 

Updated

 

May 2008

 

Publications

 

New

 

Updated

 

April 2008

 

Publications

 

New

 

Updated

 

March 2008

 

New

 

Updated

 

February 2008

 

New

 

January 2008

 

Publications

 

New

 

Updated

 

2007

 

December 2007

 

Publications

  • High Serum Total Cholesterol—An Indicator for Monitoring Cholesterol Lowering Efforts: U.S. Adults, 2005–2006.

 

New

 

November 2007

 

Publications

 

New

 

Updated

 

October 2007

 

New

 

Updated

  • Early Childhood Questionnaire (ECQ_B 2001-2002)
  • Early Childhood Questionnaire (ECQ_C 2003-2004)
    For the Early Childhood Questionnaires for 2001-2004, errors in the reported values for ECD010 (Age of mother at time of birth) and ECD070A and ECD070B (weight at birth) have been corrected.
  • Lab40 Biochemistry Profile (L40_C 2003-2004)
    The documentation of Lab 40 Biochemistry Profile was updated to correct the Blood Urea Nitrogen (BUN) method description.
  • NHANES II Hepatitis A and B (NH2HEPAT 1976-1980)
  • NHANES Herpes I and II (NH2HERPE 1976-1980)
    The NHANES II (1976-1980) hepatitis and herpes data were re-released (see “Hepatitis A and B” and “Herpes I and II” on NHANES II page) to replace the previous release entitled “Herpes and Hepatitis”. In previous release, the herpes data and the hepatitis data were combined into the same file, and the herpes data did not have the correct version. The new release has the correct data version, newly compiled documentation files, and the latest release format.
  • NHANES III Tutorial now available
  • To meet the growing demands of NHANES data users, a second web-based tutorial was developed to promote and facilitate broader and more proficient use of NHANES III data. The tutorial is intended to serve as:
  • A step-by-step course on NHANES III data retrieval and analysis for new users.
  • A self-learning tool for novice and infrequent users to supplement their knowledge of the NHANES III datasets.
  • The NHANES III tutorial, which consists of courses orienting the user to the survey, preparing an analytic dataset, and survey design factors, is now available on the NHANES website. This tutorial supplements the Continuous NHANES tutorial. While Continuing professional education credit is available for the Continuous NHANES Web Tutorial, it is not available for the NHANES III Web Tutorial.
  • The access to NHANES Tutorials is available via the second bulleted link 'NHANES Tutorials', located under the 'What's New' item or through the icon on the right side of the NHANES home page.

 

September 2007

 

New

 

Updated

 

August 2007

 

New

 

Updated

 

July 2007

 

New

 

Updated

 

June 2007

 

New

 

Updated

 

May 2007

 

New

 

Updated

  • Lab 06 Nutritional Biochemistries (L06 B 2001-2002) The homocysteine data, which were removed in March 2007, have been re-released with modifications to the data and document.
  • Lab 06 Vitamin C (L06VIT_C 2003-2004) The decimal point for variable LBDVICSI (Vitamin C (umol/L)) was changed from a whole number to a number with one decimal point so that the lower-than-the-detection-limit values would be identified correctly.
  • Lab 24 Polyfluorinated Compounds (L24PFC_C_2003-2004) has been temporarily withdrawn from release. PFOS concentrations were based on an incorrect mass spectrometric transition. A corrected dataset and documentation will be posted.

 

April 2007

 

Updated

  • Lab 02 Hepatitis files for 1999–2000, 2001–2002, and 2003–2004  were updated. Data for hepatitis B and D were added.
  • Lab 06 Nutritional Biochemistries file for 1999–2000 was updated.  The documentation files were updated to add an analytical note for homocysteine.

 

March 2007

 

New

 

Updated

 

February 2007

 

New

 

Updated

  • Varlab 1999-2000 Tuberculosis (TB) variables were removed from this lab data variable list. TB data are located on the examination data web page and TB variables included in the examination data variable list.

 

January 2007

 

New

 

Updated

 

2006

 

November 2006

 

New

 

Updated

  • PHPYPA Urinary Phthalates (PHPYPA B 2001-2002) This document was revised to remove incorrect statements regarding polyaromatic hydrocarbon analytes and variable detection limits. In fact, for all polyaromatic hydrocarbon analytes in this data set, the detection limit was constant.

 

October 2006

 

New

 

Updated

 

September 2006

 

New

 

Updated

 

Updated

 

Special Release

  • NHANES Web-based Tutorial
  • To meet the growing demands of NHANES data users, a web-based tutorial was developed to promote and facilitate broader and more proficient use of NHANES data. The tutorial is intended to serve as:
  • A step-by-step course on NHANES data retrieval and analysis for new users.
  • A self-learning tool for novice and infrequent users to supplement their knowledge of the NHANES database and the analysis techniques required to properly analyze this complex dataset.
  • A reference for experienced researchers highlighting NHANES analytic nuances and sample program code.
  • The first phase of the tutorial is now accessible via the NHANES home page. Some modules/sections are still incomplete, but will be posted on the NHANES website as soon as they are complete. The targeted completion date for the entire tutorial is January 2007.

 

July 2006

 

New

 

Updated

  • Lab 06 Homocysteine (L06MH C 2003-2004) This document was updated to remove an incorrect sentence referencing the derivatization of Methylmalonic acid from traditional units to international units (SI). The data is reported in SI units.

 

June 2006

 

New

 

Updated

 

May 2006

 

New

 

Updated

 

April 2006

 

New

 

Updated

 

March 2006

 

New

 

Updated

 

February 2006

 

New

 

Updated

 

January 2006

 

Updated

 

Announcement

 

2005

 

December 2005

 

New

 

November 2005

 

New

 

Updated

 

October 2005

 

Updated

 

August 2005

 

Updated

 

July 2005

 

New

 

Updated

  • PHPYPA Urinary Phthalates (PHPYPA_B 2001-2002)
  • PHPYPA Urinary Phthalates (PHPYPA 1999-2000)
  • Lab 06HM Heavy Metals (Lab06hm_B 2001-2002)
  • Lab 06HM Heavy Metals (Lab06hm 1999-2000)
  • Lab 18T4 Thyroid-Stimulating Hormone and Thyroxine (Lab18t4 1999-2000)
  • Lab 21 Volatile Organic Compounds (Lab 21 1999-2000)
  • Lab 26 Pesticides (Lab 26pp_B 2001-2002)
  • Lab 26 Pesticides (Lab 26pp 1999-2000)
  • Lab 28 Dioxins (Lab 28poc_B 2001-2002)
  • Lab 28 Dioxins (Lab 28poc 1999-2000)
  • Lab 40T4 Thyroid-Stimulating Hormone and Thyroxine (Lab 40t4_B 2001-2002)

 

June 2005

 

New

 

Updated

  • Audiometry (AUX 1999-2000)
  • Audiometry (AUX_B 2001-2002)
  • Balance (BAX 1999-2000)
  • Body Measures (BMX_B 2001-2002)
  • Lab13AM Triglycerides (Lab13AM 1999-2000)
  • Lab13AM_B Triglycerides (Lab13AM_B 2001-2002)
  • PHPYPA Urinary Phthalates (PHPYPA 1999-2000)
  • PHPYPA Urinary Phthalates (PHPYPA_B 2001-2002)

 

Special Release

 

 

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