National Archive of Computerized Data on Aging

This study is maintained and distributed by the National Archive of Computerized Data on Aging (NACDA), the aging program within ICPSR. NACDA is sponsored by the National Institute on Aging (NIA) at the National Institutes of Heath (NIH).

National Health Interview Survey, 2011 (ICPSR 36145)

Alternate Title:   NHIS 2011

Principal Investigator(s): United States Department of Health and Human Services. Centers for Disease Control and Prevention. National Center for Health Statistics

Summary:

The National Health Interview Survey (NHIS) is conducted annually and sponsored by the National Center for Health Statistics (NCHS), which is part of the U.S. Public Health Service. The purpose of the NHIS is to obtain information about the amount and distribution of illness, its effects in terms of disability and chronic impairments, and the kinds of health services people receive across the United States population through the collection and analysis of data on a broad range of health topics. The redesigned NHIS questionnaire introduced in 1997 (see NATIONAL HEALTH INTERVIEW SURVEY, 1997 [ICPSR 2954]) consists of a Core that remains largely unchanged from year to year, plus an assortment of Supplements varying from year to year.

The 2011 NHIS Core components contain Household, Family, Person, Sample Adult, and Sample Child files. Each record in Part 1, Household Level, contains data on type of living quarters, number of families in the household responding and not responding, and the month and year of the interview for each sampling unit. Part 2, Family Level, is made up of reconstructed variables from the person-level data of the basic module and includes information on sex, age, race, marital status, education, veteran status, family income, family size, major activities, health status, health care costs, activity limits, and employment status, along with industry and occupation. As part of the basic module, Part 3, Person Level, provides information on all family members with respect to health status, limitation of daily activities, cognitive impairment, and health conditions. Also included are variables related to doctor visits, hospital stays, and health care access and utilization. Basic demographic information is provided as well.

A randomly-selected adult in each family was interviewed for Part 4, Sample Adult Level, regarding respiratory conditions, renal conditions, AIDS, joint symptoms, health status, health care and doctor visits, limitation of daily activities, and behaviors such as smoking, alcohol consumption, and physical activity. Part 5, Sample Child Level, provides information from an adult in the household on medical conditions of one child in the household, such as developmental or intellectual disabilities, respiratory problems, seizures, allergies, and use of special equipment like hearing aids, braces, or wheelchairs.

Parts 6 through 11 comprise the additional Supplements and Paradata for the 2011 NHIS. Part 6, Injury/Poison Episode, is an episode-based file that contains information about the external cause and nature of the injury or poisoning episode and what the person was doing at the time of the injury or poisoning episode, in addition to the date and place of occurrence. Part 7, Adult Disability Level and Part 8, Child Disability Level, are a supplemental set of six questions asked at the end of the Sample Adult and Sample Child Questionnaires for half of families that did not receive the Family Disability Supplement. These specific disability questions were only asked of the Sample Adult and the Sample Child. Part 9, Family Disability Level, seeks to identify the subpopulation that is at a greater risk than the general population of experiencing restrictions in social participation, for example, restrictions in employment, education, or civic life. Specific questions ask about respondent difficulty performing daily activities, such as dressing, bathing, or walking. Approximately one half of sample adults were selected to receive the Part 10, Adult Functioning and Disability Level Supplement. Questions were asked about a respondent's functioning in various basic and complex activity domains: vision, hearing, mobility, communication, cognition, upper body, affect, pain, and fatigue. This supplement also included questions designed to capture an individual's ability to participate in society. Follow-up questions on the degree of difficulty, use of assistive devices, and functioning with assistance were included for most domains. Part 11, Paradata Level, does not contain health related information, but rather data which are related to the interview process, including measures of time, contact-ability, and cooperation. Please see the User Guide for additional information and details.

Series: National Health Interview Survey Series

Access Notes

  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.

Dataset(s)

DS0:  Study-Level Files
DS1:  Household Level - Download All Files (22.012 MB)
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DS2:  Family Level - Download All Files (65.163 MB)
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DS3:  Person Level - Download All Files (621.699 MB) large file
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DS4:  Sample Adult Level - Download All Files (210.428 MB) large file
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DS5:  Sample Child Level - Download All Files (48.808 MB)
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DS6:  Injury/ Poison Episode Level - Download All Files (13.458 MB)
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DS7:  Adult Disability Level - Download All Files (12.456 MB)
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DS8:  Child Disability Level - Download All Files (9.296 MB)
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DS9:  Family Disability Level - Download All Files (22.418 MB)
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DS10:  Functioning & Disability Level - Download All Files (21.686 MB)
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DS11:  Paradata Level - Download All Files (74.628 MB)
Documentation:
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Study Description

Citation

United States Department of Health and Human Services. Centers for Disease Control and Prevention. National Center for Health Statistics. National Health Interview Survey, 2011. ICPSR36145-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2017-01-03. https://doi.org/10.3886/ICPSR36145.v1

Persistent URL: https://doi.org/10.3886/ICPSR36145.v1

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Scope of Study

Subject Terms:    alternative medicine, child health, disabilities, doctor visits, food security, health care access, health care services, health insurance, health services utilization, health status, hospitalization, hospitals, illness, immunization, injuries, mental health, poisoning, socioeconomic status, substance abuse, tobacco use

Smallest Geographic Unit:    Region (and pseudo-PSU)

Geographic Coverage:    United States

Time Period:   

  • 2011

Date of Collection:   

  • 2011

Unit of Observation:    Individual, Family, Household

Universe:    Civilian, non-institutionalized population of the 50 states and the District of Columbia.

Data Type(s):    clinical data, survey data

Data Collection Notes:

Please note that file names references in the User Guide do not align with the names of files released by ICPSR.

For more information about the National Health Interview Survey, visit the National Health Interview Survey Web site.

Methodology

Study Purpose:    The main objective of the NHIS is to monitor the health of the United States population through the collection and analysis of data on a broad range of health topics.

Sample:    The sample design follows a multistage area probability design that permits the representative sampling of households and non-institutional group quarters (e.g., college dormitories). In order to increase the precision of estimates of the Black, Hispanic, and Asian populations, the current NHIS sample design oversamples Black persons, Hispanic persons, and Asian persons. In addition, the sample adult selection process provides that when Black, Hispanic, or Asian persons aged 65 years or older are present, they have an increased chance of being selected as the sample adult. For more information on sampling, please refer to the "NHIS Survey Description" section of the User Guide document.

Time Method:    Cross-sectional

Weight:    The data are not weighted. These data contain multiple weight variables for each part which must be used in any analysis. Users should refer to the User Guide for further information regarding the weights, their use, and their derivation.

Mode of Data Collection:    computer-assisted personal interview (CAPI), face-to-face interview, telephone interview

Extent of Processing:   ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:

  • Created variable labels and/or value labels.
  • Checked for undocumented or out-of-range codes.

Restrictions: In preparing the data files for this collection, the National Center for Health Statistics (NCHS) removed direct identifiers and characteristics that might lead to identification of data subjects. As an additional precaution, NCHS requires, under Section 308(d) of the Public Health Service Act (42 U.S.C. 242m), that data collected by NCHS not be used for any purpose other than statistical analysis and reporting. NCHS further requires that analysts not use the data to learn the identity of any persons or establishments and that the director of NCHS be notified if any identities are inadvertently discovered. ICPSR member institutions and other users ordering data from ICPSR are expected to adhere to these restrictions.

Version(s)

Original ICPSR Release:   2017-01-03

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