Nhanes cdc

Nhanes cdc DEFAULT

http://www.cdc.gov/nchs/nhanes.htm

Overview
The National Health and Nutrition Examination Survey (NHANES) is a program of studies designed to assess the health and nutritional status of adults and children in the United States. The survey is unique in that it combines interviews and physical examinations. NHANES is a major program of the National Center for Health Statistics (NCHS). The NHANES program began in the early 1960s and has been conducted as a series of surveys focusing on different population groups or health topics. In 1999, the survey became a continuous program that has a changing focus on a variety of health and nutrition measurements to meet emerging needs.

Data Collection
The survey examines a nationally representative sample of about 5,000 persons each year. These persons are located in counties across the country, 15 of which are visited each year. The NHANES interview includes demographic, socioeconomic, dietary, and health-related questions. The examination component consists of medical, dental, and physiological measurements, as well as laboratory tests administered by highly trained medical personnel. For a complete description of the survey content for NHANES 1999-2020, go to: https://wwwn.cdc.gov/nchs/data/nhanes/survey_contents.pdf

Biomarkers
Biological specimens collected in the laboratory component of NHANES include whole blood, plasma, serum, urine, hair, DNA, saliva, and nasal and vaginal swabs. Laboratory tests done on almost all survey cycles include complete blood count, lipids, a chemistry panel (kidney, hepatic function), folate/RBC folate, iron status, STDs (HIV, herpes, hepatitis), cotinine, heavy metals (lead mercury, cadmium), C-reactive protein, urinary creatinine and albumin, and diabetes (glucose, insulin, HbA1c). Laboratory tests done on a periodic basis include vitamins B6, B12, C and D, homocysteine/MMA, FSH/LH, PTH, thyroid function, bone alkaline phosphatase, cryptosporidium, helicobactor pylori, HLA-B27, environmental chemicals, latex, measles, varicella, MRSA, PSA, and selenium. The 24-Hour dietary recall supplement (1999-2006) was followed up in 2017-2018.

Publications

http://www.cdc.gov/nchs/nhanes/nhanes_products.htm

Sours: https://gero.usc.edu/cbph/network/studies-with-biomarkers/the-national-health-and-nutrition-examination-survey-nhanes/

National Health and Nutrition Examination Survey (NHANES)

NHANES is designed to assess the health and nutritional status of adults and children in the United States. Conducted since 1960, the survey includes both interview and physical examination components. The survey examines a nationally representative sample of about 5,000 people each year. The NHANES interview includes demographic, socioeconomic, dietary, and health-related questions. The examination component consists of medical, dental, and physiological measurements, as well as laboratory tests administered by highly trained medical personnel.

Data on cognitive performance in adults aged 60 years and older were collected from 2011–2014. Assessments conducted included:

  • Subjective Cognitive Decline
  • 10-item word list learning with both immediate and delayed recall
  • Animal Fluency
  • Digit Symbol Substitution

In the home interview, a self-rated question on subjective cognitive decline (SCD question) was asked:

“During the past 12 months, have you experienced confusion or memory loss that is happening more often or is getting worse?” Response categories were yes or no.

The SCD question is part of the optional cognitive decline module from the BRFSS, developed to determine the need for public health activities among adults residing in the community

The Consortium to Establish a Registry for Alzheimer’s Diseaseexternal iconexternal icon(CERAD) provides a test that measures immediate and delayed memory. A participant reads a 10-item word list (CERAD-WL) and is asked to immediately recall those 10 items. Later, after completion of the Animal Fluency and Digit Symbol Substitution tasks, the participant is asked to again list those same 10 items as a delayed recall (CERAD-DR).

The Animal Fluency test measures verbal fluency and asks participants to name as many animals as possible in 1 minute.

The Digit Symbol Substitution Test askes participants to match symbols to a corresponding number during a timed test as a measure of attention and processing speed.

NHANES cognitive performance data are publicly accessible and available at the NHANES website. All data for cognitive performance can be found under Questionnaire Data. SCD data are in the Medical Conditions data file, and data for the cognitive functioning assessments are in the Cognitive Functioning data file.

For an example of an analysis conducted using these data and a more detailed description of NHANES and the cognitive variables, please refer to this article pdf iconpdf icon[PDF-659 KB].

Data on cognitive performance in adults aged 60 years and older were collected from 2019–2020. Assessments conducted included:

  • Subjective Cognitive Decline
  • Montreal Cognitive Assessment (MoCA)

In the home interview, a self-rated question on subjective cognitive decline (SCD question) was asked:

“During the past 12 months, have you experienced confusion or memory loss that is happening more often or is getting worse?” Response categories were yes or no.

The SCD question is part of the optional cognitive decline module from the BRFSS, developed to determine the need for public health activities among adults residing in the community

The Montreal Cognitive Assessment (MoCA) is a widely used measure for accurately detecting levels of cognitive decline. The assessments in the test attempt to gauge areas of language, visuospatial abilities, memory and recall and abstract thinking, to give a representation of a person’s current cognitive ability. This cognitive functioning task pdf iconpdf icon[PDF-27.7 KB]  is administered to adults aged 60 years and older during the NHANES physical exam component.

Any future data releases will be posted on this page.

Sours: https://www.cdc.gov/aging/publications/nhanes/index.html
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Public-Use Data Files and Documentation

The National Center for Health Statistics (NCHS) is pleased to offer downloadable public-use data files through the Centers for Disease Control and Prevention’s (CDC) FTP file server. Users of this service have access to data sets, documentation, and questionnaires from NCHS surveys and data collection systems. Downloading instructions are available in “readme” files.

Public-use data files are prepared and disseminated to provide access to the full scope of the data. This allows researchers to manipulate the data in a format appropriate for their analyses. NCHS makes every effort to release data collected through its surveys and data systems in a timely manner.

Users of NCHS public-use data files must comply with data use restrictions to ensure that the information will be used solely for statistical analysis or reporting purposes.

 

National Health and Nutrition Examination Survey (NHANES)

 

National Health Care Surveys

 

National Vital Statistics System (NVSS)

 

National Survey of Family Growth (NSFG)

 

National Health Interview Survey (NHIS)

 

National Immunization Survey (NIS)

 

Longitudinal Studies of Aging (LSOA)

 

State and Local Area Integrated Telephone Survey (SLAITS)

 

NCHS Data Linkage

 

Compressed Mortality File

 

SPACE Program

Sours: https://www.cdc.gov/nchs/data_access/ftp_data.htm
NHANES Participants (English)

National Health and Nutrition Examination Survey

The NHANES interview includes demographic, socioeconomic, dietary, and health-related questions. The examination component consists of medical, dental, and physiological measurements, as well as laboratory tests administered by highly trained medical personnel.

All participants visit the physician. Dietary interviews and body measurements are included for everyone. All but the very young have a blood sample taken and have a dental screening. Depending on the age of the participant, the rest of the examination includes tests to assess various aspects of health. In general, the older the individual, the more extensive the examination.

Health interviews are conducted in respondents’ homes. Health measurements are performed in specially-designed and equipped mobile centers, which travel to locations throughout the country. The study team consists of a physician, medical and health technicians, and dietary and health interviewers. Many of the study staff are bilingual (English/Spanish).

NHANES included visual examinations from 1999–2008.  From 2005–2008 NHANES included ophthalmology examinations, including retinal imaging and Frequency Doubling Technology (FDT) tests for visual field loss from eye diseases.

Sours: https://www.cdc.gov/visionhealth/vehss/data/national-surveys/national-health-and-nutrition-examination-survey.html

Cdc nhanes

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  2. Cardiovascular Diseases, Chronic Diseases, Diabetes, Health Care Utilization, Immunization, Nutrition, Oral Health, Physical Activity, Risk Factors, Screening, TB, Tobacco
  3. CDC National Health and Nutrition Examination Survey (NHANES)

The survey examines a nationally representative sample of about 5,000 persons each year. The NHANES interview includes demographic, socioeconomic, dietary, and health-related questions. The examination component consists of medical, dental, and physiological measurements, as well as laboratory tests administered by highly trained medical personnel. Findings from this survey are used to determine the prevalence of major diseases and risk factors for diseases and to assess nutritional status and its association with health promotion and disease prevention. NHANES findings are also the basis for national standards for such measurements as height, weight, and blood pressure.


Sours: https://www.unmc.edu/phda/?directory_listings=cdc-national-health-and-nutrition-examination-survey-nhanes
NHANES: Past, Present, Future

National Health and Nutrition Examination Survey (NHANES) Restricted Variables

Geographic Variables

All geography below the national level is restricted for continuous NHANES, prior to that all geography below the regional level is restricted.

Dates

The exact date of interview and exam are restricted for all years. NHANES does not provide a variable name for exact date of interview and exam in the limited access documentation. In your proposal and data dictionary use DATE as the variable name and in the description portion, describe the date (i.e exact date of interview).

Variable NameVariable Description
Interview DATEExact Interview Date
Exam DATEExact Date of Examination

Genetic Data

DNA specimens were collected in the National Health and Nutrition Examination Survey (NHANES) III (1988–1994) and in subsequent NHANES cycles (1999–2002, 2007–2008, 2009–2010, and 2011–2012).

More Information about Genetic Data

Please direct your questions about genetic data to [email protected], and the RDC process to [email protected]

Limited Access Data from NHANES

Continuous NHANES Variable Search tool

Enter the keywords to search for specific variables. Select “Yes” on the Include Non–public Variables line.

Search by survey cycle

Select the survey cycle(s) of interest—Select Limited Access Data under the Data, Documentation, Codebooks, SAS Code section.

Linked Data Products

NHANES has been linked to Mortality, Medicare Claims, Social Security Benefits, and Air Quality data.

Quarterly Food–at–Home Price Database

NCHS has conducted a data linkage of the National Health and Nutrition Examination Survey (NHANES) to the Quarterly Food–at–Home Price Database (QFAHPD) from USDA’s Economic Research Service (ERS). The NHANES Linked food price data files include the continuous NHANES years (1999–2006). Linkage of the NHANES survey participants with the QFAHPD provides the opportunity to support research on the economic determinants of food consumption, diet quality, and health outcomes. These data files contain geography–specific information, therefore, are not available for public–use.

Sours: https://www.cdc.gov/rdc/b1datatype/Dt1222.htm

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