DOI

10.17077/etd.r7noptja

Document Type

Dissertation

Date of Degree

Spring 2016

Degree Name

PhD (Doctor of Philosophy)

Degree In

Epidemiology

First Advisor

Ramirez, Marizen

First Committee Member

Peek-Asa, Corinne

Second Committee Member

Saftlas, Audrey

Third Committee Member

Casteel, Carri

Fourth Committee Member

Torner, James

Fifth Committee Member

Cavanaugh, Joseph

Abstract

This dissertation focused on the topic of youth violence in two very different populations, young workers and youth offenders.

Youth violence at the home, in school and in the community has been well documented in the literature but very little is known about the prevalence of and risk factors for victimization at the workplace in young workers. In chapter two, a retrospective cohort study was conducted using National Crime Victimization Survey data from 2008–2012. We calculated a rate of workplace violence victimization and compared those rates between occupations and demographic characteristics in young workers 16–24 years. Multilevel, weighted Poisson regression models were used to compare rates of workplace victimization across occupations and demographic characteristics.

The rate of workplace violence victimization was 1.11 (95% CI: 0.95–1.27) incidents per 1,000 employed person-months. Young workers in retail sales occupations had a higher rate of workplace victimization than workers in health care occupations (RR = 0.52, 95% CI: 0.26–1.03) but a lower rate of workplace victimization than workers in protective service occupations (RR = 2.25, 95% CI: 1.34–3.77). Rates of workplace violence victimization differed significantly by age, income and workplace location.

In contrast, the prevalence of and risk factors for juvenile offender are well-known. However, there still exist major gaps in determining the effectiveness of tertiary interventions, justice-based processes (i.e. formal appearance in court vs. informal agreement or meeting with court officer) and placement (e.g. detention centers, foster care, mental health institutions). In chapters three and four, the effectiveness of justice-based processes and placement on recidivism in young offenders 12–16.5 years were evaluated using data received from the Iowa Criminal and Juvenile Justice Planning Agency (CJJP) from 2010–2013. Multivariable logistic regression was used to impute risk level scores, to calculate propensity scores and to measure associations between demographic or complaint characteristics and main exposures. A sensitivity analysis was conducted by comparing the associations between process type and recidivism in a sample matched on propensity scores to the original unmatched sample. Cox Proportional Hazards models were used to compare time to recidivism by process type or placement in matched and unmatched samples.

In chapter three, out of 2,901 youth offenders, 41% recidivated over an 18-month period. Eighteen percent were formally processed while 82% received an informal agreement. Youth who received an informal agreement had a lower risk of reoffending at any time compared to youth who were formally processed in both the unmatched (HR = 0.93, 95% CI: 0.76–1.13) and matched sample (HR= 0.86, 95% CI: 0.65–1.14). These estimates were not statistically significant. We observed an offense-specific association between processing and recidivism. Property (HR = 0.74; 95% CI: 0.57–0.96) offenders who received an informal agreement were significantly less likely to recidivate compared to property offenders who were formally processed.

In chapter four, out of 1,469 youth offenders, 36% recidivated over an 18-month period. Nine percent received placement while 91% did not. Youth who received placement had up to an 87% higher risk of reoffending at any time compared to youth who did not receive placement in both unmatched (HR = 1.52, 95% CI: 1.11–2.08) and matched (HR= 1.87, 95% CI: 1.23–2.84) samples. We observed a charge-specific association between receiving placement and recidivism. Youth charged with a simple misdemeanor (HR = 2.74; 95% CI: 1.63–4.60) or other charges (HR = 6.60, 95% CI: 1.56–28.00) and received placement were significantly more likely to recidivate compared to those who did not receive placement.

These findings contribute to the youth violence literature in the following ways. Chapter two identified the occupations and target populations in need of policies and evidence-based interventions aimed at improving the working conditions for young workers. Chapter three and four supports the continual evaluation of the juvenile justice system to determine the best practices that may reduce violence and recidivism in young offenders.

Public Abstract

The youth violence epidemic is a global public health concern due to various health, social and economic adverse outcomes. As a result, this dissertation focused on violence in two very different populations, young workers and youth offenders.

In chapter two, we calculated a rate of workplace violence victimization and compared those rates by occupations and demographic characteristics in young workers 16–24 years using the National Crime Victimization Survey from 2008–2012. We found that young workers in protective service occupations had a higher rate of workplace violence victimization than young workers in retail sales occupations. In contrast, healthcare or social service occupations had a lower rate of workplace victimization than retail sales occupations. Information acquired from this study can be used to advance to the next step of preventing violence exposure at the workplace—developing policies and interventions aimed at improving the working conditions for young workers.

In chapters three and four, we evaluated the effectiveness of justice-based processes (appearance in court vs. meeting with court officer) and placement (e.g. detention centers, foster care, mental health institutions) on recidivism in youth offenders 12–16.5 years using data from the Iowa Criminal and Juvenile Justice Planning Agency from 2010–2012. Although processing was not associated with recidivism, youth who received placement were more likely to recidivate compared to those who did not receive placement. This research may improve upon the current juvenile justice system in Iowa by recommending evidence-based practices.

Keywords

Juvenile Justice System, Recidivism, Workplace Violence, Young Workers, Youth Offenders, Youth Violence

Pages

xv, 158 pages

Bibliography

Includes bibliographical references (pages 142-158).

Copyright

Copyright © 2016 Maisha Nynell Toussaint

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