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Introduction to Violence Epidemiology. With a focus on crime-related violence. Thomas Songer, PhD University of Pittsburgh tjs@pitt.edu. What is Violence? What actions characterize violence?. Definition of Violence. …...To understand violence, you need to define violence.
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Introduction to Violence Epidemiology With a focus on crime-related violence Thomas Songer, PhD University of Pittsburgh tjs@pitt.edu
Definition of Violence …...To understand violence, you need to define violence How would you define violence?
Definition of Violence • wide ranging in the literature • crime-related, spouse, child, firearms • National Research Council • behaviour by individuals that intentionally threaten, attempt, or inflict physical harm on others www.nap.edu
Categories of Violence • Crime-based Violence • Homicide • Robbery • Rape • Serious Assaults • Firearm-related Violence • Suicide • Domestic Violence
Categories of Violence • Crime-based Violence • Firearm-related Violence • Suicide • successful and unsuccessful • Domestic Violence • partner • child • elder
Public Health Approach to Disease Control Monitoring of Identify Intervene Evaluate incidence risk factors prevalence Prevention social Identify genetic morbidity environmental mortality cost
Surveillance Identify Monitoring Intervene Evaluate risk factors
Surveillance of Violence from Crime • Death Certificates • Police Reports • Uniform Crime Reports • Government Surveys • National Criminal Victimization Survey • Medical Databases
Leading Causes of Death, U.S.1995 SOURCE: NCIPC, 1998.
Homicide Rates; Selected Countries France England Canada New Zealand Scotland ICE, 1998
Crime Violence Data Sources • Federal Bureau of Investigation • Uniform Crime Reporting System • NIBRS • National Institute of Justice • National Crime Victimization Survey
Down with Crime “How to Cut City’s Crime Rate: Don’t Report It” “Philadelphia’s Crime Data Discarded by FBI” Philadelphia Inquirer 1997-98
The Pyramid of Violent Crime in the U.S., 1994 1.8% admitted to hospital 3.4% seen in an emergency department 14.5% received medical care 25% resulted in physical injury 41% reported to police 10,860,000 violent crimes 1994 NCVS
Uniform Crime Reports (1994) National Crime Victimization Survey (1994) National Violence Against Women Survey (1995-96) 102,216 168,000 rapes 149,000 attempted 117,000 sex. assault 302,100 females affected 876,000 rape events National Estimates of Rape and Sexual Assault
Injuries from Crime Medical Sources and Police Sources “You look at them as victims, we look at them as suspects”
Definition of Health Care Events Related to Violence • Based on E-codes • E960-969 Homicide and injury purposely inflicted • E coding to distinguish crimes is relatively poor
The Pyramid of Rape in the United States, 1994 3.4% admitted to hospital 4.6% seen in an emergency department 17.6% received medical care 32% reported to police 1994 NCVS 433,000 rapes/sexual assaults
Problems in Crime Violence Surveillance • Definition of violence may not be standard across sources • Reporting of violence by victims varies considerably • Rape • Reporting of violence by the police may vary
Risk Factor Identification Identify Monitoring Intervene Evaluate risk factors
Epidemiologic Model Host Agent Environment Crime Victim Perpetrator Environment
Violent Crime Victims by Age Group, Pennsylvania, 1994 1994 UCR
Workplace Homicide Rates by Occupation North Carolina, 1977-1991, n= 361
Prevalence of Serious Violence in Pittsburgh by Ethnicity and Age
Prevention Identify Monitoring Intervene Evaluate risk factors
Prevention Strategies • Criminal Justice • Behavioural • Environmental • Public Health
Haddon Matrix Adapted from Haddon, 1980.
Violence in Pennsylvania http://www.pitt.edu/~tjs/vio/viopenn.htm