Affiliation: JBS International, Inc.
Location: North Bethesda, USA
Hanno Petras is currently the Associate Director of Research and Development of JBS International, Inc. a company focused on understanding the specific health, social, and education needs of people across the lifespan. Dr. Petras received his doctoral training in medical sociology and statistics at Christian-Albrechts University in Kiel, Germany and completed his postdoctoral training in prevention science through a fellowship from the National Institute of Mental Health at Johns Hopkins University under the tutelage of Drs. Kellam & Brown. Before joining JBS, Dr. Petras was an Assistant Professor in the Department of Criminology and Criminal Justice at the University of Maryland (2005-2009) and a Research Scientist at the CDC funded Center for Youth Violence Prevention at Johns Hopkins University (2002-2005). In addition Dr. Petras serves as an adjunct Assistant Professor in the Department of Mental Health at Johns Hopkins University’s Bloomberg School of Public Health and as an Affiliate at the Maryland Population Research Center. His research interests and expertise are in the development of antisocial behavior, the design and evaluation of preventive interventions and the appropriate application of statistical methods using latent variables. Dr. Petras serves on the Board of Directors for the Society for Prevention Research and is an active member of the Prevention Science Methodology Workgroup. He is an experienced reviewer for peer reviewed journals and serves as the Consulting Editor for Prevention Science. He has published extensively in peer-reviewed journals and is currently editing a book series with Dr. Zili Sloboda entitled Advances in Prevention Science that focus on defining prevention science. The book series is being published by Springer Publications.
- Modeling growth in boys' aggressive behavior across elementary school: links to later criminal involvement, conduct disorder, and antisocial personality disorderCindy M Schaeffer
Department of Psychology, University of Maryland Baltimore County, Baltimore, MD 21250, USA
Dev Psychol 39:1020-35. 2003..Peer rejection was highest among boys with chronic high aggression. Interventions with boys with distinct patterns of aggression are discussed...
- Effects of a universal classroom behavior management program in first and second grades on young adult behavioral, psychiatric, and social outcomesSheppard G Kellam
American Institutes for Research, 921 E Fort Avenue, Suite 225, Baltimore, MD 21230, United States
Drug Alcohol Depend 95:S5-S28. 2008..This article reports on impact to ages 19-21...
- Depressed mood and the effect of two universal first grade preventive interventions on survival to the first tobacco cigarette smoked among urban youthYan Wang
Office of Policy and Planning, University of Maryland School of Medicine, 685 W Baltimore St, HSF 1, Suite 618, Baltimore, MD 21201, USA
Drug Alcohol Depend 100:194-203. 2009..Variation in the relationship between depressed mood and first cigarette smoked by gender and grade was also examined...
- Early childhood behavior trajectories and the likelihood of experiencing a traumatic event and PTSD by young adulthoodCarla L Storr
Dept of Family and Community Health, School of Nursing, University of Maryland, Baltimore, 655 West Lombard Street, Baltimore, MD 21201, USA
Soc Psychiatry Psychiatr Epidemiol 44:398-406. 2009..The findings illustrate that repeated assessments of disruptive classroom behavior during early school years identifies more fully males at increased risk for PTSD-level traumatic events, than a single measure at school entry does...
- Parent psychopathology and youth internalizing symptoms in an urban community: a latent growth model analysisMarcy Burstein
Johns Hopkins University School of Medicine, Baltimore, MD, USA
Child Psychiatry Hum Dev 41:61-87. 2010..These results underscore the importance of targeting parents with mood and anxiety disorders in urban families in order to reduce the risk for internalizing difficulties in their adolescent youth...
- Predicting negative life outcomes from early aggressive-disruptive behavior trajectories: gender differences in maladaptation across life domainsCatherine P Bradshaw
Department of Mental Health, Bloomberg School of Public Health, Johns Hopkins University, 624 N Broadway, Baltimore, MD 21205, USA
J Youth Adolesc 39:953-66. 2010..Boys with CHAD and boys with an increasing pattern had equal levels of risk for experiencing negative outcomes. The findings are consistent with transactional models of development and have implications for preventive interventions...
- Patterns of functional impairment and their change among youth served in systems of care: an application of latent transition analysisRobert L Stephens
ICF Macro, 10 Mustard St, Valle Verde 5, Pasig City, 1604, Philippines
J Behav Health Serv Res 37:491-507. 2010..Importantly, a small group of males and females transitioned from a low to a higher impairment class. Providers should note that gender differences existed in the nature of change in class membership over time...
- The developmental impact of two first grade preventive interventions on aggressive/disruptive behavior in childhood and adolescence: an application of latent transition growth mixture modelingHanno Petras
JBS International, Inc, 5515 Security Lane, Suite 800, North Bethesda, MD 20852, USA
Prev Sci 12:300-13. 2011..Effects for females in classroom-centered interventions went in the hypothesized direction but did not reach significance...
- The effect of two elementary school-based prevention interventions on being offered tobacco and the transition to smokingYan Wang
Division of Growth and Nutrition, Department of Pediatrics, University of Maryland School of Medicine, 737 W Lombard Street, Room 163, Baltimore, MD 21201, United States
Drug Alcohol Depend 120:202-8. 2012..Specifically, we examined whether the interventions' effect on survival to first use was via the reduction of offers to smoke and/or through preventing the transition from first offer to smoking...
- Developmental epidemiological courses leading to antisocial personality disorder and violent and criminal behavior: effects by young adulthood of a universal preventive intervention in first- and second-grade classroomsHanno Petras
University of Maryland College Park, Department of Criminology and Criminal Justice, College Park, MD 20742, USA
Drug Alcohol Depend 95:S45-59. 2008..From first through seventh grade the developmental trajectories of 2311 students from 19 Baltimore City Public Schools were examined. We report the GBG impact on these trajectories and ASPD and violent and criminal behavior by age 19-21...
- Methods for testing theory and evaluating impact in randomized field trials: intent-to-treat analyses for integrating the perspectives of person, place, and timeC Hendricks Brown
Department of Epidemiology and Biostatistics, College of Public Health, University of South Florida, 13201 Bruce B Downs Blvd, Tampa, FL 33612, United States
Drug Alcohol Depend 95:S74-S104. 2008..Practical strategies for reducing model complexity, checking model fit, and handling missing data are discussed using six randomized field trials to show how these methods may be used across trials randomized at different levels...
- Utility of TOCA-R scores during the elementary school years in identifying later violence among adolescent malesHanno Petras
Johns Hopkins University School of Public Health, Baltimore, MD, USA
J Am Acad Child Adolesc Psychiatry 43:88-96. 2004..To evaluate the utility of a teacher-rating instrument (TOCA-R) of aggressive behavior during elementary school years in identifying boys at risk for later violence...
- Developmentally inspired drug prevention: middle school outcomes in a school-based randomized prevention trialC Debra M Furr-Holden
Pacific Institute for Research and Evaluation, 17710 Beltsville Drive, Calverton, MD 20705, USA
Drug Alcohol Depend 73:149-58. 2004..042). This study adds new evidence on intervention-associated reduced risk of starting illegal drug use. In the context of 'gateway' models, the null evidence on marijuana is intriguing and merits attention in future investigations...
- Gender differences in patterns of risk factors among children receiving mental health services: latent class analysesChristine M Walrath
ORC Macro, 116 John St, Suite 800, New York, NY 10038, USA
J Behav Health Serv Res 31:297-311. 2004..In addition, it may result in immediate improvement in the triage of children into services and a better understanding of their behaviors during and after treatment...
- When the course of aggressive behavior in childhood does not predict antisocial outcomes in adolescence and young adulthood: an examination of potential explanatory variablesHanno Petras
The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
Dev Psychopathol 16:919-41. 2004....
- The utility of elementary school TOCA-R scores in identifying later criminal court violence among adolescent femalesHanno Petras
Department of Criminology and Criminal Justice, University of Maryland, College Park, MD 20742, USA
J Am Acad Child Adolesc Psychiatry 44:790-7. 2005....
- A comparison of girls' and boys' aggressive-disruptive behavior trajectories across elementary school: prediction to young adult antisocial outcomesCindy M Schaeffer
Department of Psychology, University of Maryland Baltimore County, Baltimore, MD 21250, USA
J Consult Clin Psychol 74:500-10. 2006..Girls with the LMAD trajectory differed from boys with the IAD trajectory...
- Examining racial and ethnic disparities in site of usual source of careDarrell J Gaskin
Morgan Hopkins Center of Health Disparities Solutions, Baltimore, MD, USA
J Natl Med Assoc 99:22-30. 2007..Therefore, in addition to focusing on provider-patient relationships, perhaps future research and policymakers should focus on system-level factors to explain and increase minority use of care in private physicians' offices...
- Empirically derived subtypes of child academic and behavior problems: co-occurrence and distal outcomesWendy M Reinke
University of Missouri Columbia, 16 Hill Hall, Columbia, MO 65211, USA
J Abnorm Child Psychol 36:759-70. 2008..Implications for early identification, prevention, and intervention for children at risk for academic failure and disruptive behavior problems are discussed...
- The good behavior game and the future of prevention and treatmentSheppard G Kellam
Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, Maryland 21205, USA
Addict Sci Clin Pract 6:73-84. 2011..We discuss the role of the GBG and possibly other universal prevention programs in the design of more effective systems for promoting children's development and problem prevention and treatment services...