DOI: 10.3886/icpsr36983.v1
title: Northwestern Juvenile Project (Cook County, Illinois), Follow-up 6, 2004-2008
title: Version 1

description: This study contains data from the sixth follow-up interview of the Northwestern Juvenile Project (NJP), a longitudinal assessment of alcohol, drug, or mental service treatment needs of juvenile detainees. The sixth follow-up occurred approximately 8 years after the baseline interview and focused on studying the development and persistence of psychiatric disorders, related predictive variables, patterns of drug use, and other risk behaviors.
The project's aims included studying (1) development and persistence of alcohol, drug, and mental disorders and (2) pathways and patterns of risky behaviors. Changes in disorders over time were studied (including onset, remission, and recurrence), comorbidity, associated functional impairments, and the risk and protective factors related to these disorders and impairments. This study addressed patterns and sequences of the development of drug use and related variables, focusing on gender differences, racial/ethnic differences, the antecedents of these risky behaviors (risk and protective factors), and how these behaviors were interrelated.
The original sample included 1829 randomly selected youth, 1172 males and 657 females, then 10 to 18 years old, enrolled in the study as they entered the Cook County Juvenile Temporary Detention Center from 1995 to 1998. Among the sample were 1005 African Americans, 524 Hispanics, and 296 non-Hispanic white respondents. Participants were tracked from the time they left detention. All participants were eligible for the sixth follow-up interview. Re-interviews were conducted regardless of where respondents were living when their follow-up interview was due: in the community, correctional settings, or by telephone if they lived farther than two hours from Chicago.
description: The project's aims included studying (1) development and persistence of alcohol, drug, and mental disorders and (2) pathways and patterns of risky behaviors. Changes in disorders over time were studied (including onset, remission, and recurrence), comorbidity, associated functional impairments, and the risk and protective factors related to these disorders and impairments. This study addressed patterns and sequences of the development of drug use and related variables, focusing on gender differences, racial/ethnic differences, the antecedents of these risky behaviors (risk and protective factors), and how these behaviors were interrelated. The development and persistence of alcohol, drug, and mental disorders of delinquent youth are examined.
Data from the baseline interview were deposited at the National Addiction and HIV Data Archive Program with the Inter-University Consortium for Political and Social Research. Data from the first follow-up (conducted approximately three years after the baseline), second follow-up (conducted approximately three and a half years after the baseline), third follow-up (conducted approximately four years after the baseline, fourth follow-up (conducted approximately 4.5 years after baseline), and fifth follow-up (conducted approximately 6 years after baseline) were deposited with ICPSR's National Archive of Criminal Justice Data.
description: A random subsample of participants was scheduled for a follow-up interview approximately 8 years after their baseline interview (Follow-up 6). Participants were tracked until they were found for an interview, withdrew, or were known to have died. Some participants who were difficult to locate received their follow-up interviews substantially later than the planned interview dates.
Follow-up interviews were conducted face-to-face wherever the participant was living--in the community or in any correctional facility in Illinois--at the time their interview was due. However, community interviews were conducted by telephone if the participant lived more than 2 hours away. Diagnostic modules were administered via pencil and paper interviewing (PAPI) or computer assisted personal interviewing (CAPI). Non-diagnostic modules were initially administered via PAPI; however beginning with the fifth follow-up, they were administered via CAPI.
description: Follow-up 6 consists of 58 data files. Follow-up interview data are stored in separate datasets corresponding to each interview module.

<strong>The main dataset (Main)</strong> includes administrative information on what measures were conducted, the location of and type of interview, interview date and age of respondent at interview. This dataset (da36983-0001) has 19 variables, 1829 observations.
<strong>The interviewer comments (Comments)</strong> asked the interviewer to record their observations of how participants managed the interview, including whether participants had any difficulties with particular measures, whether participants seemed to be truthful, and whether the participant exhibited any psychotic symptoms. Interviewers filled out this observational measure following the interview. The dataset (da36983-0002) includes 64 variables, 1376 observations.
<strong>The Child and Adolescent Functional Assessment Scale (CAFAS)</strong> includes multidimensional measurements of functional impairment and scales of role performance, behavior toward others, mood, self-harmful behavior, substance use, and thinking. This dataset (da36983-0003) includes 37 variables and 1407 observations.
<strong>The Children's Global Assessment Scale (CGAS)</strong> module summarizes the interviewer's impression of the lowest level of the participant's functioning at home, in school and/or work, and in other social environments. This dataset (da36983-0004) has 4 variables and 1408 observations.
<strong>The Diagnostic Interview Schedule (DIS)</strong> is a structured interview that assesses psychiatric disorders based on DSM-IV criteria. The dataset referencing the interview questionnaire (da36983-0006) contains 873 variables and 1438 observations. These variables include demographics, alcohol withdrawal, dependence, and abuse; amphetamine withdrawal, dependence, and abuse; Antisocial Personality Disorder, and Conduct Disorder. The diagnostic dataset (da36983-0005) contains 744 variables and 1438 observations. These variables were generated by scoring algorithms using items from the interview questionnaire. 
<strong>The World Mental Health Composite International Diagnostic Interview (WMH-CIDI)</strong> is a comprehensive, fully-structured interview designed to be used by trained lay interviewers to assess mental disorders based on the definitions and criteria of DSM-IV. The interview questionnaire (da36983-0008) contains information regarding: depression, generalized anxiety disorders, Post-Traumatic Stress Disorder, Panic Disorder, mania, and suicidality. This dataset includes 646 variables and 1439 observations. An additional dataset (da36983-0007) contains variables regarding the diagnoses for mental disorders that were generated by scoring algorithms using items from the interview questionnaire with 286 variables and 1439 observations.
<strong>The Northwestern Juvenile Project Interview (NJP Interview)</strong> contains 50 data sets (da36983-0009 through da36983-0057). Beginning with Follow-Up 5, the "non-diagnostic" components of the interview (e.g., the CFA and the RBAP) were integrated into a unified interview called the NJP Interview. The topics covered were as follows:


Non-school services 
Service sectors 
Referral sources 
Payment information 
Military service 
Medical history 
Attitudes and barriers to treatment: Receptivity to services 
Attitudes and barriers to treatment: Perception of barriers to services 
Arrest and violence, and gun questions 
Gang activity 
Victimization 
Self-esteem, self-efficacy, and life satisfaction 
Sexual risk behavior 
Gambling 
Drug use history and recent drug use 
Drug injection and needle use 
Auxiliary therapy services.


<strong>The Incarceration data</strong> (da36983-0058: 10 variables, 1442 observations) comes from a combination of correctional records and self-report, and includes information on the number of days incarcerated prior to the interview.
description: Follow-up weights are sampling weights augmented with adjustments for nonresponse (e.g., withdrew, died) at the follow-up. Sampling weights and normalized sampling weights are provided in the Main dataset da36983-0001.
description: Response Rates: 1442 participants received a Follow-up 6 interview (79% of baseline participants). Reasons for non-response at Follow-up 6 were: died before the 8-year cut-off (n=70); withdrew from the study (n=40); and could not be located (n=277).
description: Presence of Common Scales: CAFAS - Child and Adolescent Functional Assessment Scale
CGAS - Children's Global Assessment Scale
DIS - Diagnostic Interview Schedule, Version IV
WMH-CIDI - World Mental Health Composite International Diagnostic Interview
description: A stratified random sample of 1,829 youth at intake from Cook County Juvenile Temporary Detention Center (CCJTDC) in Chicago, Illinois, was recruited between November 20, 1995, and June 14, 1998. This baseline sample was stratified by gender, race/ethnicity (African American, non-Hispanic white, Hispanic, "other" race/ethnicity), age (10-13 years or 14 years and older), and legal status (processed in juvenile or adult court) to obtain enough participants to examine key subgroups (e.g., females, Hispanics, younger persons). There were a total of 13 strata, as listed below. There were too few female detainees of each race/ethnicity and detainees identified as "other" race/ethnicity to further stratify these groups. Detainees aged 10 to 13 years were not stratified by legal status because they were generally too young to be considered for transfer to adult court.
Sampling Strata:

African American females
Non-Hispanic white females
Hispanic females
African American males, aged 10-13 years
Non-Hispanic white males, aged 10-13 years
Hispanic males, aged 10-13 years
African American males, 14 years or older and processed as adult transfer
Non-Hispanic white males, 14 years or older and processed as adult transfer
Hispanic males, 14 years or older and processed as adult transfer
African American males, 14 years or older and processed as a juvenile
Non-Hispanic white males, 14 years or older and processed as a juvenile
Hispanic white males, 14 years or older and 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 for the stratum ranged from 0.018 to 0.689.
The sixth follow-up was conducted approximately 8 years after the baseline with a random subsample.
description: Datasets: 
DS0: Study-Level Files
DS1: Main
DS2: Comments
DS3: CAFAS
DS4: CGAS
DS5: DIS Dx
DS6: DIS Items
DS7: WMH-CIDI Dx
DS8: WMH-CIDI Items
DS9: Interview-Part A-Residential Stability
DS10: Interview-Part B-School
DS11: Interview-Part C-Work and Income
DS12: Interview-Part D-Military
DS13: Interview-Part E-Medical
DS14: Interview-Part E-Medical Sexually Transmitted Diseases
DS15: Interview-Part F-Spouse/Significant Other
DS16: Interview-Part J-Loss
DS17: Interview-Part J-Loss Grid
DS18: Interview-Part K-Social Support
DS19: Interview-Part K-Social Support Grid
DS20: Interview-Part L-Self-Esteem Scale
DS21: Interview-Part M-Self-Efficacy Scale
DS22: Interview-Part N-Community
DS23: Interview-Part O-Arrest and Violence
DS24: Interview-Part P-Gambling
DS25: Interview-Part Q-Drug Screen
DS26: Interview-Part Q-Drug Screen Grid
DS27: Interview-Drug Supplement A-First Use
DS28: Interview-Drug Supplement B-Recent_Use
DS29: Interview-Part R-Decision Balance Scale
DS30: Interview-Part S-Change Assessment
DS31: Interview-Part T-Drug Injection and Needle Use
DS32: Interview-Part U-Attitudes and Peer Behavior
DS33: Interview-Part V-School Services
DS34: Interview-Part V-School Services Screen
DS35: Interview-Part V-School Educational Services
DS36: Interview-Part V-School Mental Health Services
DS37: Interview-Part W-Auxiliary Therapies
DS38: Interview-Part W-Auxiliary Therapies Grid
DS39: Interview-Part W-Auxiliary Therapies Groups
DS40: Interview-Part W-Auxiliary Therapies Services
DS41: Interview-Part X-Nonschool Services
DS42: Interview-Part X-Nonschool Services Inpatient Screen
DS43: Interview-Part X-Nonschool Services Outpatient Screen
DS44: Interview-Part X-Nonschool Inpatient/Residential Services
DS45: Interview-Part X-Nonschool Outpatient Services
DS46: Interview-Part Y-Service Sectors
DS47: Interview-Part Z-Referral
DS48: Interview-Part AA-Receptivity to Services
DS49: Interview-Part BB-Perception of Barriers to Services
DS50: Interview-Part CC-Payment Information
DS51: Interview-Part JJ-Victimization
DS52: Interview-Part JJ-Victimization Grid 1
DS53: Interview-Part JJ-Victimization Grid 2
DS54: Interview-Part JJ-Victimization Grid 3
DS55: Interview-Part KK-Gang Activity
DS56: Interview-Part LL-Future Orientation
DS57: Interview-Part MM-Quality of Life
DS58: Incarceration
description: Male and female juvenile detainees, ages 10 to 18, at intake to the Cook County (IL) Juvenile Temporary Detention Center (CCJTDC) between November 20, 1995 and June 14, 1998. Smallest Geographic Unit: none
description: computer-assisted personal interview (CAPI); face-to-face interview; mixed mode; paper and pencil interview (PAPI); telephone interviewSupporting documentation for DIS Dx (da36983-0005) and WMH-CIDI Dx (da36983-0007) data files contain proprietary descriptions and algorithms. This information is included in text files available only through restricted access procedures. See Appendix 3 of the User Guide for a detailed explanation of how diagnosis variables were derived.To avoid participant burden, the screening criteria for DIS Section R and Section S was changed from "lifetime" to "since the last interview" beginning with Follow-up 5 and all subsequent follow-up interviews. To determine lifetime substance use disorders, users must draw from prior waves to determine whether the participant had ever met criteria for a substance use disorder.