Northwestern Juvenile Project (Cook County, IL): Baseline, 1995-1998 [Restricted] (ICPSR 32603)
Alternate Title: NJP Baseline
Principal Investigator(s): Teplin, Linda A., Northwestern University. Feinberg School of Medicine
Established in 1995, the Northwestern Juvenile Project assessed alcohol, drug, or mental (ADM) service needs of juvenile detainees. The study took place between the years of 1995 and 1998, sampling 1,829 male and female juvenile detainees within Cook County, Illinois. This study had two specific aims:
- To assess the juvenile detainees ADM service needs (including psychiatric disorder, comorbidity and functional impairment); and,
- To determine the extent that juvenile detainees who need ADM services received them while in the custody of the criminal justice system.
This study has four methodological advantages over prior research:
- Stratified random sampling;
- Sufficiently large N (approximately 600 females and 1200 males);
- Reliable instruments; and
- Comorbidity data.
Questions for respondents generally pertain to demographics, medical and sexual history, criminal history, aptitude and mental health assessment, familial and social relations, drug abuse, and education.
One or more files in this study are not available for download due to special restrictions ; consult the restrictions note to learn more. You can apply online for access to the data. A login is required to apply for access. (Instructions on YouTube.)
Users are reminded 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 organizations.
Access to this data is restricted. Users interested in obtaining these data must complete a Restricted Data Use Agreement, specify the reasons for the request, and obtain IRB approval or notice of exemption for their research. Apply for access to these data through the ICPSR data access request system portal. See the ICPSR data access request system portal for information and instructions.
Teplin, Linda A. Northwestern Juvenile Project (Cook County, IL): Baseline, 1995-1998 [Restricted]. ICPSR32603-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2013-08-30. http://doi.org/10.3886/ICPSR32603.v1
Persistent URL: http://doi.org/10.3886/ICPSR32603.v1
This study was funded by:
- United States Department of Health and Human Services. National Institutes of Health. National Institute on Drug Abuse
- United States Department of Health and Human Services. National Institutes of Health. National Institute of Mental Health (R01MH54197)
- United States Department of Health and Human Services. National Institutes of Health. National Institute on Alcohol Abuse and Alcoholism
- United States Department of Justice. Office of Justice Programs. Office of Juvenile Justice and Delinquency Prevention
- Open Society Institute
- Chicago Community Trust
- William T. Grant Foundation
- John D. and Catherine T. MacArthur Foundation
Scope of Study
Subject Terms: alcohol abuse, behavior problems, child abuse, cognitive functioning, delinquent behavior, drug abuse, drug dependence, HIV, juvenile detention, mental disorders, post-traumatic stress disorder, risk factors
Date of Collection:
Unit of Observation: individual
Universe: Male and female juvenile detainees, ages 10 to 18, in the Cook County (IL) Juvenile Temporary Detention Center (CCJTDC) between November 1995 and June 1998. All detainees younger than 17 years are held at CCJTDC, including youths processed as adults (automatic transfers to adult court). Youths may be detained in the CCJTDC until they are 21 years of age if they are being prosecuted for an arrest that occurred when they were younger than 17 years.
Data Types: survey data
Males and females, aged 10 to 18 years were randomly sampled at intake into the Cook County Juvenile Temporary Detention Center (CCJTDC) from November 1995 through June 1998. The sample was stratified by gender, race/ethnicity (African American, non-Hispanic White, Hispanic, other), age (males only, aged 10 to 13 years or 14 years and older), and legal status (males only, processed as a juvenile or as an adult). There were a total of 13 strata:
- black females
- non-Hispanic white females
- Hispanic females
- black males, 10-13 years old
- non-Hispanic white males, 10-13 years old
- Hispanic males, 10-13 years old
- older black males, processed as an adult
- older non-Hispanic white males, processed as an adult
- older Hispanic males, processed as an adult
- older black males, processed as a juvenile
- older non-Hispanic white males, processed as a juvenile
- older Hispanic males, processed as a juvenile
- other race/ethnicity
Detainees were eligible to be sampled regardless of their psychiatric morbidity, state of drug or alcohol intoxication, or fitness to stand trial. Within each stratum, the project used a random-numbers table to select names from Cook County Juvenile Temporary Detention Center's intake log. The final sampling fractions ranged from 0.018 to 0.689.
Time Method: Longitudinal
The case weight, or base weight, is t_WT. This is the inverse of the sampling fraction for the corresponding strata. The number of persons in the population represented by each participant in the strata is t_WT.
The case weight for use with the AIDS subsample is aids_T.
The case weight for use with the PTSD subsample is ptsd_WT.
The normalized case weight is t_wt. This is the case weight t_WT divided by the mean of the case weights.
The number of persons in a population of 1829 represented by each participant in the strata is t_wt. The sum of the t_wt is 1829.
The normalized case weight for use with the AIDS Risk subsample is aids_wt. The sum of the aids_wts 800.
The normalized case weight for use with the PTSD/Loss subsample is ptsd_wt. The sum of the ptsd_wts 915.
Mode of Data Collection: cognitive assessment test, face-to-face interview, mixed mode, paper and pencil interview (PAPI)
Response Rates: Of the 2275 names selected at CCJTDC, 4.2 percent (34 youth and 62 parents or guardians) refused to participate. There were no significant differences in refusal rates by sex, race/ethnicity, or age. Of the 96 total refusals, 26 were processed as adults (automatic transfers) who were counseled by their lawyers to refuse participation. The refusal rate in this stratum was 7.1 percent (26 of 368). Twenty-seven youth left the detention center before interviews could be scheduled; 312 were not interviewed because they left while attempts were made to locate their caretakers for consent. Eleven others were excluded: 9 became physically ill during the interview and could not finish it, 1 was too cognitively impaired to be interviewed, and 1 appeared to be lying according to interviewers.
Presence of Common Scales:
- Diagnostic Interview Schedule for Children (DISC) version 2.3
- Diagnostic Interview Schedule for Children (DISC) version IV (PTSD module only)
- Columbia Impairment Scale
- Child-Global Assessment Scale (C-GAS)
- Peabody Picture Vocabulary Test-Revised (PPVT-R)
- Wide Range Achievement Test-Revised (WRAT-R; arithmetic and reading modules)
Other measures used often drew questions from established measures but have their own, project based names. They are:
- Demographics [adapted from the Demographics Module for the MECA study]
- AIDS Risk Behavior Assessment (ARBA) [drawn from the Washington DC Metropolitan Area Drug Study of Juveniles and the Adolescent Health Survey from NIDA's Study of Street Youth at Risk for AIDS]
- Criminal History Supplement (CHS) [items adapted from the Denver Youth Survey]
- Child Maltreatment Assessment Profile (CMAP) [the CMAP draws from the Child Maltreatment Interview and the Child Abuse Module for the MECA study]
- Medical [adapted from the Medical module from the MECA study]
- PTSD and Loss [includes the DISC-IV PTSD module referenced above]
- Service Utilization (SERV) [adapted from the service utilization module from the MECA study]
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.
- Standardized missing values.
- Performed recodes and/or calculated derived variables.
- Checked for undocumented or out-of-range codes.
Original ICPSR Release: 2013-08-30
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