EPI 2670: Injury Epidemiology Transportation Related Injuries Thomas Songer, PhD University of Pittsburgh.

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Presentation transcript:

EPI 2670: Injury Epidemiology Transportation Related Injuries Thomas Songer, PhD University of Pittsburgh

Types of Transportation

Top Ten Public Health Achievement

History of Crashes Fatality Rate per 100 Million Vehicle Miles

Studying the Epidemiology of Injuries from Crashes

The Accident Triumvirate Environment Vehicle Driver

The Crash Sequence Pre-crash Period Crash Period Post-crash Period

The Haddon Matrix use for planning, resource allocation, strategy identification HumanVehicleEnvironment Pre-event Event Post-event

How do we know what the impact of crashes are?

Surveillance: Systematic, regular ascertainment of incidence using methods distinguished by their practicality, uniformity, and frequently their rapidity, rather than by complete accuracy. Last, 1990

Definition of Crashes Police-reported crashes Fatal crashes Self-reported crashes Insurance-reported crashes Injury-producing crashes Property-damage producing crashes

Fatality Analysis Reporting System

Police Accident Reports State vehicle registration files State driver licensing files State Highway Department data Death certificates Coroner/Medical examiner reports Hospital medical records Emergency medical service reports FARS

Fatality Analysis Reporting System 39,187 fatal motor vehicle crashes occurred in the United States in 2005, and 43,443 deaths occurred in these crashes.

Fatal Crashes,

Persons Killed, United States,

Number % Speed % Alcohol Costs Related Related (millions) 1, $ 4,385 All figures are 1997 State of Pennsylvania Department of Transportation Fatal Accidents in Pennsylvania

GES General Estimates System General Estimates System

USA Crash Rates By Severity 6,279,000 total crashes Fatal Injury Property Damage per 100 million VMT FARS, GES

What are the descriptive factors related to crashes?

Human Environmental Vehicular Failure Design Speed Age Gender Experience Alcohol Fatigue Road Cond. Traffic Weather

Driver Involvement Rates in Crashes by Gender and Crash Severity 1999 GES/FARS per 100,000 licensed drivers Fatal MalesFemales

Crash Death Rates per 100,000 population by Age and Gender 1999 FARS

Motor Vehicle Crash Death Rates among Males by Country, 1980 Age group

Percent of Drivers in Crashes with Alcohol Involvement by Age Group 1999 GES/FARS Age (in years) Fatal Injury

Drivers Involved in Fatal Crashes by Previous Driving Record Previous Crashes14.8% Previous Suspensions12.4% Previous DWI Convictions3.4% Previous Speeding Convictions21.0% Other Moving Violations17.6% No Previous Convictions57.3% 1999 FARS

Proportion of Vehicles Involved in Traffic Crashes 1999 GES/FARS

Crash Rates by Type of Vehicle 1997 FARS per 100 million vehicle miles traveled Fatal Crashes

Crash Rates by Type of Vehicle 1997 GES per 100 million vehicle miles traveled InjuryProperty Damage

USA Crash Rates by Month 1999 GES/FARS per 100 million vehicle miles traveled

Crash Rates by Road Type, 1997, Pennsylvania (per 100 million VMT) PennDOT

Crashes by Hour of Day, PA Number 1997 PennDOT

Alcohol Involved Crashes by Time of Day 1999 GES,FARS Number of Crashes MorningEvening

Alcohol Related Crashes by Time of Day 1999 GES,FARS MorningEvening Property Damage InjuryFatal Injury

Crash Severity by Posted Speed Limit 1999 GES/FARS Property Damage InjuryFatal Injury %

Research Issues

No Standard Definition of Crashes Police-reported crashes –under-reports non-fatal & less severe events Self-reported crashes –drivers with impairments may under-report Injury-producing crashes –does not include less severe events Property-damage producing crashes –under-reporting to insurance companies

Various sources suggest that about half the motor vehicle crashes in the country are not reported to the police, the majority of these unreported crashes involve only minor property damage and little personal injury. General Underreporting of Accidents

Death Rates per 10,000 Vehicles Registered by Country Ethiopia Bangladesh Swaziland Ecuador Hong Kong

MMUCC Crash Date & Time Place Manner of Crash Weather Conditions Road Condition Vehicle Make VIN Model Minimum Uniform Crash Criteria Total Occupants Seating Position Injury Status Seat Belt Use Alcohol Involvement Air bag Deployment Important Data Elements

To measure benefits in terms of reducing death, disability, and medical costs, NHTSA determined that statewide data were needed that included all persons involved in police- reported crashes -- those who were injured as well as those who were not injured. CODES

Prevention of Injuries from Motor Vehicle Accidents Changes in Highway Design Changes in Vehicle Design Seat Belts Air Bags Speed Limits Changes in Licensing

Air Bags Work (except for a few) - Up through December 1999, air bags have saved an estimated 4969 lives. - In purely frontal crashes, air bags reduce car driver deaths by percent. - Since 1990, 175 deaths have been caused by airbags