DOI: 10.6077/4tfd-ng77
title: National Health Interview Survey, 2004

description: &lt;p&gt;The purpose of the National Health Interview Survey (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. Implementation of a redesigned NHIS, consisting of a basic module, a periodic module, and a topical module, began in 1997 (see NATIONAL HEALTH INTERVIEW SURVEY, 1997 [ICPSR 2954]). The 2004 NHIS contains the Household, Family, Person, Sample Adult and Sample Child files from the basic module. Each record in the Household-level File (Part 1) 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. The Family-level File (Part 2) is made up of reconstructed variables from the person-level data of the basic module and includes information on sex, age, race, marital status, Hispanic origin, education, veteran status, family income, family size, major activities, health status, activity limits, and employment status, along with industry and occupation. As part of the basic module, the Person-level File (Part 3) provides information on all family members with respect to health status, limitation of daily activities, cognitive impairment, and health conditions. Also included are data on years at current residence, region variables, height, weight, bed days, doctor visits, hospital stays, and health care access and utilization. A randomly-selected adult in each family was interviewed for the Sample Adult File (Part 4) regarding respiratory conditions, use of nasal spray, renal conditions, AIDS, joint symptoms, health status, limitation of daily activities, and behaviors such as smoking, alcohol consumption, and physical activity. The Sample Child File (Part 5) provides information from an adult in the household on medical conditions of one child in the household, such as respiratory problems, seizures, allergies, and use of special equipment like hearing aids, braces, or wheelchairs. Also included are variables regarding child behavior, the use of mental health services, and Attention Deficit Hyperactivity Disorder (ADHD) as well as responses to the SDQ-EX, which is the extended version of Strengths and Difficulties questionnaire on child mental health. Several changes have occurred in the 2004 NHIS. The Child Immunization Section (CIM) has been dropped. Also new in 2004, questionnaires have been provided in both English and Spanish. The Injury/Poison Episode File (Part 6) 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. The Injury/Poison Episode Verbatim File (Part 7) contains edited narrative text descriptions of the injury or poisoning provided by the respondent. Imputed income files for 2004 are now available through the NCHS Web site at www.cdc.gov/nhis. (Source: downloaded from ICPSR 7/13/10)&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Please Note:&lt;/strong&gt; This dataset is part of the historical CISER Data Archive Collection and is also available at ICPSR -- &lt;a href="https://doi.org/10.3886/ICPSR04349.v2"&gt;https://doi.org/10.3886/ICPSR04349.v2&lt;/a&gt;. We highly recommend using the ICPSR version as they made this dataset available in multiple data formats.https://doi.org/10.3886/ICPSR04349.v2..&lt;/p&gt;
description: National Health Interview Survey, [Core Data]
description: collection_notes: The data collected in the NHIS are obtained through a complex sample design involving stratification, clustering, and multistage sampling. Because of this complex design and adjusted sampling weights, the direct application of standard statistical analysis methods for estimation and hypothesis testing to unweighted data may yield misleading results. If data are not weighted, severely biased estimators may result. For this reason, as indicated previously, it is necessary to use the weights that are included in the accompanying data file for analyses.