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High Mortality in Elderly Drivers is Associated with Distinct Injury Patterns: Analysis of 187,869 Injured Drivers. Graciela Bauzá, MD Wayne W. LaMorte, MD, PhD, MPH Peter A. Burke, MD, FACS Erwin F. Hirsch, MD, FACS Boston University Medical Center Boston, MA. Background.
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High Mortality in Elderly Drivers is Associated with Distinct Injury Patterns:Analysis of 187,869 Injured Drivers Graciela Bauzá, MD Wayne W. LaMorte, MD, PhD, MPH Peter A. Burke, MD, FACS Erwin F. Hirsch, MD, FACS Boston University Medical Center Boston, MA
Background • 6 million motor vehicle collisions (MVCs) in 2004 • 40,000 fatalities (22/100,000 drivers) in 2004 • 85% National Restraint Use Rate (<50% in MA) • $230 billion cost • 1 death / 12 minutes • Leading cause of death ages 3-33 (2002 data) • >50% deaths are unrestrained occupants NHTSA/FARS 2004 • Elderly (70+) ~ 9% of total U.S. resident population (~20 million licensed) • Growth rate higher than total population • 12% of all traffic fatalities NHTSA/FARS 2004
Objective:To determine whether elderly drivers involved in motor vehicle collisions differ in severity or pattern of injury from other age groups. Methods: • Retrospective review of National Trauma Data Bank (NTDB) • NTDB 1994-2004 • Subjects: 187,869 drivers 15,755 elderly drivers (70+) • Main measurements: Injury Severity Score, Abbreviated Injury Score, Length of Stay, Mortality, Disposition, Restraint usage • Statistical Analysis: chi-squared tests and ANOVA
Injury Severity Score (ISS) * 58,970 52,283 41,083 19,788 15,755 * ISS for 70+ injured drivers is significantly higher than for other age groups (p=0.0001).
Abbreviated Injury Score (AIS) p=0.0001 p=0.0001 p=0.0001 p>0.05 p>0.05 p=0.0001 p=0.0001 p=0.0001
* * *Length of Stay and Mortality for 70+ was significantly higher than for other age groups (p<0.0001).
Safety Measure Use * National Safety Belt Use Rate for 2005 was 85%. (NHTSA)
* * * * * * * * * *ISS and Mortality were significantly higher in unrestrained elderly drivers (p<0.05).
Conclusion • Elderly drivers in MVCs have: • Greater injury severity, especially head & chest • Greater mortality • Safety measures are particularly vital in reducing injury severity and mortality in elderly drivers.
If he can walk out of this… we can do better!!!
Acknowledgments Peter A. Burke, MD, FACS Erwin F. Hirsch, MD, FACS Wayne W. LaMorte, MD, PhD, MPH Heidi Wing Marie Yacubovich
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