DOI: 10.3886/icpsr38955.v1
title: Nonfatal Firearm Injury and Firearm Mortality in High-risk Youths and Young Adults 25 Years After Detention, Chicago, Illinois, 1995-2020
title: Version 1

description: This study contains data from the Northwestern Juvenile Project (NJP) Series, a prospective longitudinal study of the mental health needs and outcomes of youth in detention. 
 The purpose of this study was to examine nonfatal firearm injury and firearm mortality in 1,829 youths in Chicago, Illinois who were involved with the juvenile justice system and to compare incidence rates of firearm mortality with the general population. 
 The study publication is available for download.
description: The purpose of this study was to examine nonfatal firearm injury and firearm mortality in 1,829 youths in Chicago, Illinois who were involved with the juvenile justice system and to compare incidence rates of firearm mortality with the general population.
description: The Northwestern Juvenile Project is a 25-year prospective longitudinal cohort study of youths after juvenile detention in Chicago, Illinois. Youths were randomly selected by strata (sex, race and ethnicity, age and legal status [juvenile or adult cohort]) at intake from the Cook County Juvenile Temporary Detention Center. Participants were interviewed at baseline (November 1995 to June 1998) and re-interviewed as many as 13 times over 16 years, through February 2015. Official records on mortality were collected through December 2020. Data analysis was conducted from November 2018 to August 2022.
description: Variables in this study contain information about exposure to gun violence and resulting injuries and mortality.
description: Some strata were over-sampled to obtain enough information on key subgroups (e.g., females, Hispanics). Sampling weights are provided in the dataset, as well as sampling weights adjusted for nonresponse (e.g., withdrew, died) at follow-up (also see the User's Guide).
description: Response Rates: Follow-up interviews for the entire sample were conducted when funding became available, at approximately 3, 5, 6, 8, 12, 14, 15, and 16 years after the baseline interview; subsamples were interviewed at 3.5, 4, 10, 11, and 13 years after baseline. Participants were interviewed whether they lived in the community or in correctional facilities. At 16 years after baseline, the study team interviewed 1394 of 1709 participants who were still alive (81.6%).
description: The study team recruited a stratified random sample of 1829 youths who were arrested and detained at intake to the Cook County Juvenile Temporary Detention Center (CCJTDC) in Chicago, Illinois, between November 20, 1995, and June 14, 1998. CCJTDC is used for pretrial detention and for youths sentenced for fewer than 30 days. To ensure adequate representation of key subgroups, the study team stratified the sample by sex, race, and ethnicity (Black, Hispanic, non-Hispanic White, and other racial and ethnic group, including Asian American and Pacific Islander and American Indian); age (10-13 years and greater than or equal to 14 years); and legal status (processed in juvenile or adult court). The baseline sample included 1172 (64.1%) males and 657 (35.9%) females; 1005 (54.9%) Black, 524 (28.6%) Hispanic, 296 (16.2%) non-Hispanic White participants, and 4 participants (0.2%) from other racial and ethnic groups (mean [SD] age, 14.9 [1.4] years). The study team conducted face-to-face structured interviews at the detention center, most within 2 days of intake.
description: Datasets: 
DS1: Nonfatal Firearm Injury and Firearm Mortality in High-risk Youths and Young Adults 25 Years After Detention, Chicago, Illinois, 1995-2020
description: Persons in this study are a stratified random sample of 1829 youths who were arrested and detained at intake to the Cook County Juvenile Temporary Detention Center (CCJTDC) in Chicago, Illinois, between November 20, 1995, and June 14, 1998. Smallest Geographic Unit: City
description: computer-assisted personal interview (CAPI); face-to-face interview; mixed mode; telephone interviewThe data collection instruments for this study are available from the Study Website