Choice of denominator to measure disparities in motor vehicle crash deaths of teens and young adults. Christopher J. Mansfield, PhD & Satomi Imai, PhD* East Carolina University Greenville, NC 134th Annual APHA Meeting November 4-8, 2006 * Presenter. Objectives.
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Christopher J. Mansfield, PhD
& Satomi Imai, PhD*
East Carolina University
134th Annual APHA Meeting
November 4-8, 2006
Center for Highway Research, UNC Chapel Hill for data on the number of young licensed drivers in NC.
(2001 National Household Travel Survey)
(Fatality facts 2004, Insurance Institute for Highway Safety)
*from the North Carolina State Center for Health Statistics
*from the National Center for Health Statistics
*from the UNC Highway Safety Research Center
We looked at MVC mortality rates for young drivers in NC by: underestimated by conventional definition of mortality rate.
MVC mortality rates underestimated by conventional definition of mortality rate.
per population vs. per licensed drivers
Racial/ethnic disparities assessed by different mortality rate definitions
Substantial differences, particularly for Native Americans. rate definitions
Disparities are much more substantial when measured by the licensed driver rate
When using Licensed Drivers as the denominator, for 17 year olds, disparity ratio compared to Whites changes:
Native Americans –
from 3.5:1 to 8.1:1
from 0.8:1 to 5.5:1
from 0.5:1 to 1.3:1
Regional disparity olds, disparity ratio compared to Whites changes:
Eastern NC vs. the rest of the state
Yearly trend of the state.
Teen drivers’ mortality rates increased radically have increased each year regardless of the denominator used.
from 2000 to 2004 (80% increase).
For additional information, American and Hispanic drivers had tragically high rates for MVC deaths. Young African American drivers had a similar MVC mortality rate to young white drivers when licensed drivers were used as the denominator.