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National Health and Nutrition Examination Survey |
| NCHS Home | NHANES Home | Participant | What's New Survey Results and Products | Data Sets | Health Professionals | Growth Charts | CDC/NCHS Privacy Policy Notice | Accessibility | Search NCHS | Contact us | |
What's New
April 2009
New
Audiometry/Tympanometry
(AUXTYM_D 2005-2006)
Perchlorate,
Nitrate, and Iodide in Tap Water (WPIN_D 2005-2006)
March 2009
Announcements
Deadlines
for proposals for 2011-12 NHANES content
New
Homocysteine
(HCY_D 2005-2006)
Varicella-Zoster
Virus Antibody (SSVARI_C 2003-2004)
Varicella-Zoster
Virus Antibody (SSVARI_B 2001-2002)
Varicella-Zoster
Virus Antibody (SSVARI_A 1999-2000)
Supplementary
handcards for the 2005-2006 Questionnaires
Supplementary
handcards for the 2007-2008
Questionnaires
Updated
Lab
26 Pesticides (LAB26PP_B 2001-2002)
Lab
26 Pesticides (LAB26PP 1999-2000)
For
1999-2000 and 2001-2002 Lab 26 Pesticides, the variables URXDCB and URDDCBLC
were added, and variables URX14D and URD14DLC were removed.
February 2009
New
NHANES
III 31A. Dietary Interview - Vitamin K and 3-Methylhistidine
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
Allergen
Specific IgE(s) and Total IgE in Serum (Al_IgE_D 2005-2006)
Shellfish IgE has been changed to Shrimp IgE in the dataset and
documentation.
The estimates of the prevalence of prehypertension have been revised.
January 2009
New
Total
Arsenics and Speciated Arsenics (UAS_D 2005-2006)
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.
1999-2000
Limited Access Data page
2001-2002
Limited Access Data page
2003-2004
Limited Access Data page
Updated
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
(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
Ophthalmology
- Frequency Doubling Technology (OPXFDT_D 2005-2006)
Ophthalmology
- Retinal Imaging (OPXRET_D 2005-2006)
Osteoporosis
(OSQ_D 2005-2006)
Lab
06 Acrylamide and Glycidamide (L06AGE_C 2003-2004)
Lab
52 HPV Serum (L52SER_C 2003-2004)
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
Lab
40 Biochemistry Profile and Hormones (Lab40_B 2001-2002)
The rounding of the variable LBXSCLSI was changed from 0.1 to 1.0.
Dual
Energy X-Ray Absorptiometry (DXX 1999-2004)
Two lines of code needed to construct the sample weights were inadvertently
omitted from the SAS programs PROC DESCRIPT and PROC REGRESS in the
documentation. The programs have been corrected as of 12/19/08; if you used
this SAS code prior to this date, please review your SAS program code.
October 2008
Publications
No.
10. Anthropometric Reference Data for Children and Adults: United States,
2003-2006. 45 pp. (PHS) 2009-1250. October 24, 2008 
New
Dietary
Supplement Use (DSQ_D 2005-2006)
Urinary
Heavy Metal (UHM_D 2005-2006)
Lab
06 Second Day (L06_2_B 2001-2002)
Lab
06 Vitamin D Second Day ( VID_2_B 2001-2002)
Surplus
Sera: Polyfluoroalkyl Chemicals (Pooled Samples) (PFC_POOL 2001-2002)
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
(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
Depression
in the United States Household Population, 2005-2006
New
Food
Frequency Questionnaire - Raw Questionnaire Responses (FFQRAW_D 2005-2006)
Food
Frequency Questionnaire - DietCalc Output (FFQDC_D 2005-2006)
Prescription
Medications Questionnaire (RXQ_D 2005-2006)
Drug
Information (RXQ_DRUG 2005-2006)
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.
NCHS
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This page last reviewed
April 29, 2009
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