substance abuse treatment,
Date of Collection:
Unit of Observation:
The civilian, noninstitutionalized population of the
coterminous United States (Alaska and Hawaii excluded) aged 12 and
Data Collection Notes:
Data were collected by the Temple University
Institute for Survey Research, Philadelphia, PA, under contract with
the National Institute on Drug Abuse. The data and codebook were
prepared for release by Research Triangle Institute, Research Triangle
Park, NC, and the codebook was initially distributed by National
Opinion Research Center, Chicago, IL, under contracts with the
Substance Abuse and Mental Health Services Administration.
selected variables, statistical imputation was done following logical
imputation to replace missing responses. These variables are
identified in the codebook as "...LOGICALLY IMPUTED" and
"...imputed" 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 by the hot-deck technique. Hot-deck
imputation is described on pages 16-17 of the codebook.
weights were constructed following data collection to account for
sample households and persons who were not at home or refused to
participate. The household sampling weight is the product of four
stagewise sampling weights, each of which is equal to the inverse of
the selection probability for that stage. Two post-stratification
adjustments were made to compensate for differential response rates
across demographic subgroups and residual deviation of selected
demographic characteristics of the sample from parameter data (based
on the 1980 Census).
To protect the confidentiality of
respondents, all variables that could be used to identify individuals
have been encrypted or collapsed in the public use file. These
modifications should not affect analytic uses of the public use
Revisions involving the editing of recency-of-use variables
and removal of ineligible respondents were made to the original 1985
National Household Survey on Drug Abuse (NHSDA) data file to make it
more comparable with later NHSDAs. This resulted in several
differences between the original and public use files. Although
differences in prevalence estimates are generally small, estimates
contained in the National Institute on Drug Abuse publication, 1985
NHSDA MAIN FINDINGS, cannot be replicated using the public use
For some drugs that have multiple names, questions regarding the use of that drug may be asked for each distinct name. For example, the use of methedrine and desoxyn are measured separately in this study even though they are both methamphetamine.
Multistage area probability sample design involving four
selection stages: (a) primary areas (e.g., counties), (b) area
segments within primary areas (e.g., blocks or enumeration districts),
(c) listing units within area segments, (d) sample households within
listing units, from which one eligible resident (if any) was
selected. The three race/ethnic groups were: whites/others, Blacks,
and Hispanics. Minorities and younger household members were
oversampled. The four age groups were: ages 12 to 17, 18 to 25, 26 to
34, and 35 and older. The probability of selection varied with the
composition of the household for different age/ethnicity groups and
with the number of residents within the selected age group.
personal interviews and self-enumerated answer sheets
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:
Performed consistency checks.
Standardized missing values.
Created online analysis version with question text.
Checked for undocumented or out-of-range codes.
Restrictions: Users are reminded by the United States Department of Health and Human Services that these data are to be used solely for statistical analysis and reporting of aggregated information and not for the investigation of specific individuals or treatment facilities.