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National Health and Nutrition Examination Survey

What's New

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

 

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

 

April 2009

 

Publications

  • Anthropometric Reference Data for Children and Adults: United States, 1988–1994
    PDF Version (2.8 MB)

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.

 

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

  • No. 10. Anthropometric Reference Data for Children and Adults: United States, 2003-2006. 45 pp. (PHS) 2009-1250. October 24, 2008 PDF Version (1.24 MB)

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.

 

 

Archive - What's New

 

 

National Health and Nutrition Examination Survey 50th anniversary

50th Anniversary
Contact Us:
  • National Center for Health Statistics
    3311 Toledo Rd
    Hyattsville, MD 20782
  • 1 (800) 232-4636
  • cdcinfo@cdc.gov

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