DOI: 10.3886/icpsr03262
title: National Household Survey on Drug Abuse, 2000
title: Archival Version

description: The National Household Survey on Drug Abuse (NHSDA) series
measures the prevalence and correlates of drug use in the United
States. The surveys are designed to provide quarterly, as well as
annual, estimates. Information is provided on the use of illicit
drugs, alcohol, and tobacco among members of United States households
aged 12 and older. Questions include age at first use as well as
lifetime, annual, and past-month usage for the following drug classes:
marijuana, cocaine (and crack), hallucinogens, heroin, inhalants,
alcohol, tobacco, and nonmedical use of prescription drugs, including
pain relievers, tranquilizers, stimulants, and sedatives. The survey
covers substance abuse treatment history and perceived need for
treatment, and includes questions from the Diagnostic and Statistical
Manual (DSM) of Mental Disorders that allow diagnostic criteria to be
applied. Respondents are also asked about personal and family income
sources and amounts, health care access and coverage, illegal
activities and arrest record, problems resulting from the use of
drugs, and needle-sharing. Questions introduced in previous NHSDA
administrations were retained in the 2000 survey, including questions
asked only of respondents aged 12 to 17. These "youth experiences"
items covered a variety of topics, such as neighborhood environment,
illegal activities, gang involvement, drug use by friends, social
support, extracurricular activities, exposure to substance abuse
prevention and education programs, and perceived adult attitudes
toward drug use and activities such as school work. Also retained were
questions on mental health and access to care, perceived risk of using
drugs, perceived availability of drugs, driving behavior and personal
behavior, and cigar smoking. Questions on the tobacco brand used most
often were introduced with the 1999 survey and retained in the 2000
survey. Demographic data include gender, race, age, ethnicity, marital
status, educational level, job status, veteran status, and current
household composition.
description: Due to unequal selection probabilities at multiple stages of sample selection and various adjustments, such as those for nonresponse
and poststratification, the 2000 NHSDA sample is not self-weighting.
Analysts are advised to use the sample weight when attempting to use
the NHSDA data to draw inferences about the target population or any
subdomain of the target population. All estimates published in SAMHSA
reports (such as the Summary of Findings from the 2000 NHSDA) are
weighted using the final analysis weight for the full sample (ANALWT). For the
public use file, the corresponding final sample weight is denoted as
ANALWT_C, C for confidentiality protection. This sample weight
represents the total number of target population persons each record
on the file represents. Note that the sum of ANALWT_C, over all
records on the data file, represents an estimate of the total number
of people in the target population.
description: Response Rates: The study yielded a weighted screening response rate
of 93 percent and a weighted interview response rate for the CAI of 74
percent.
description: A multistage area probability sample for each of the 50
states and the District of Columbia was used since 1999. A coordinated five-year sample
design was developed for 1999 through 2003. Although there is no
overlap with the 1998 sample, the design facilitated an overlap in
first-stage units (area segments) between each two successive years in
the five-year design. This design was intended to increase the
precision of estimates in year-to-year trend analyses because of the
expected positive correlation resulting from the overlapping
sample. To obtain the required precision at the state level and to
improve the precision of cigarette brand data for youths at the
national level, youths and young adults were oversampled. The result
was that each state's sample was approximately equally distributed
among three major age groups: 12 to 17 years, 18 to 25 years, and 26
years or older. The achieved sample for the 2000 computer-assisted
interview (CAI) sample was 71,764 persons. The public use file has
58,680 records due to the subsampling step used in the disclosure
protection procedures. Minimum item response requirements were defined
for cases to be retained for weighting and further analysis (i.e.,
"usable" cases). These requirements, as well as full sampling
methodology, are detailed in the codebook.
description: Datasets: 
DS1: National Household Survey on Drug Abuse, 2000
description: The civilian, noninstitutionalized population of the
United States aged 12 and older, including residents of
noninstitutional group quarters such as college dormitories, group
homes, shelters, rooming houses, and civilians dwelling on military
installations.
description: audio computer-assisted self interview (ACASI); computer-assisted personal interview (CAPI)Users are advised to review the errata file prior
to conducting any analyses.Data were collected and prepared for
release by Research Triangle Institute, Research Triangle Park,
NC.The National Household Survey on Drug Abuse survey administration and sample design changed with the implementation of the 1999 survey. Since 1999, the survey sample has employed a 50-State design with an independent, multistage area probability sample for each of the 50 States and the District of Columbia. Therefore, estimates produced from the 1999, 2000, and 2001 surveys are not comparable to those produced from the 1998 and earlier surveys.For selected variables, statistical imputation was
performed following logical inference to replace missing
responses. These variables are identified in the codebook as
"...LOGICALLY ASSIGNED" for the logical procedure, or by the
designation "IMPUTATION-REVISED" in the variable label when the
statistical procedure was also performed. The names of statistically
imputed variables begin with the letters "IR". For each
imputation-revised variable there is a corresponding imputation
indicator variable that indicates whether a case's value on the
variable resulted from an interview response or was imputed. Missing
values for some demographic variables were imputed by the unweighted
hot-deck technique used in previous NHSDAs. Beginning in 1999,
imputation of missing values for many other variables was accomplished
using predictive mean neighborhoods (PMN), a new procedure developed
specifically for the NHSDA. Both the hot-deck and PMN imputation
procedures are described in the codebook.To protect the privacy
of respondents, all variables that could be used to identify
individuals have been encrypted or collapsed in the public use file.
To further ensure respondent confidentiality, the data producer used
data substitution and deletion of state identifiers and a subsample of
records in the creation of the public use file.Previously
published estimates may not be exactly reproducible from the variables
in the public use file due to the disclosure protection procedures
that were implemented.The data definition and dictionary files
for Stata are designed to be compatible with StataSE, Version 8. This
is a large data file requiring that approximately 250 megabytes of
Random Access Memory be allocated to Stata. Operations within Stata,
including conversion of the ASCII data to Stata format, are likely to
be slow. Analysts may wish to download subsets of data from the
SAMHDA Data Analysis System (DAS) for use with Stata.