Council of State & Territorial Epidemiologists June 4, 2012 / Omaha, NE Leslie Seymour, MD, MPH Jon Roesler, MS Anna Gaichas, MS Mark Kinde, MPH Injury and Violence Prevention Minnesota Department of Health Trends in Minnesota Motorcycle Crash Injury

Background Methods Results Discussion

Background

Is engine size increasing? The average engine size in all classes of motorcycles involved in fatal crashes has risen. Motorcycles with engine sizes larger than 1,400 cubic centimeters: 29 percent in percent in percent in

Methods

Data MHA (Minnesota Hospital Association) Universal Billing Data DPS (Department of Public Safety) Crash Data Death Certificates CODES Data (Crash Outcome Data Evaluation System) - Linked Hospital and Crash Data DVS (Department of Vehicle Services) Data - Licensed Operators - Registered Vehicles Data looked at was restricted to drivers.

Results

Minnesota Motor Vehicle Crashes Rate Rates are incidents per 100,000 driver licenses/permits

Minnesota Motorcycle Crash Trend Rate Rates are incidents per 100,000 motorcycle licensed operators MN Crash Facts

MN Motorcycle-related Death Trend Rate Rates are incidents per 100,000 motorcycle licensed operators Death Certificates

Rate of MN Motorcycle-Related Injuries Rate Rates are incidents per 100,000 motorcycle licensed operators Hospital UB data

Rate of Minnesota TBI Resulting from Motorcycle Crashes Rates are incidents per 100,000 motorcycle licensed operators Hospital UB data Rate

Rate of TBI Motorcycle & Other Motor Vehicle Crashes Rate Rates are incidents per 100,000 motorcycle licensed operators & 100,000 licensed/permitted drivers

Rates of Severity of TBI by Cause If in a crash Other MVC, Severe Rates are incidents per 100,000 crashes Rate

Potential Influencing Factors Increased numbers of motorcycles/riders Gender Age-group Location: Urban vs. Rural Helmet Use Impairment Speed

Percent Increase Licensed Operators & Registered Vehicles Licensed Drivers ---- Registered Vehicles N N Cars & TrucksMotorcycles 24% 61% 8% 12% DVS Data

Number of Injured Motorcyclists Gender by year N Year Hospital UB data 33%

Rate of Injured Motorcyclists Gender by year Rate Rates are incidents per 100,000 motorcycle licensed operators Hospital UB data

Motorcycle Injuries by Age Group N Hospital UB data

Rate of Motorcycle Injury by Age Group Rates are incidents per 100,000 motorcycle licensed operators Rate Hospital UB data

Age Groups with Largest Increases in Injuries N Year Hospital UB data

Location of Crashes: Urban vs. Rural N Year Crash Data

Motorcyclist Impairment in Crashes Unknown N Year Crash Data

Helmet Use by Motorcyclists that Crashed, N Year Crash Data

Speed Reported as Factor in Motorcycle Crash Crash Data N

Motorcycle Crash: Fatal vs. Nonfatal Logistic Regression Results FactorOdds RatioP-value Impaired Rural years old years old Speeding3.8<.0001 Adjusting for above variables, gender and helmet use. Codes Data

Motorcycle Crash: Injured vs. Non-Injured Logistic Regression Results FactorOdds RatioP-value Rural years old Speeding years old Male Adjusting for above variables, impairment and helmet use. Codes Data

Motorcycle Crash: TBI vs. Other Injury Logistic Regression Results FactorOdds RatioP-value years old No Helmet Speeding Impaired 2.5<.0001 Adjusting for above variables, gender and location. Codes Data

Discussion

Summary Motorcycle crash trend in Minnesota has been relatively stable over the last 10 years. Minnesota does have an increasing trend of motorcycle crash injuries and deaths. 40% of these injuries are TBIs. Speed was the only factor that was significant in all three outcomes.

What’s Next?

Contact Information Leslie Seymour, MD, MPH Epidemiologist Injury & Violence Prevention Unit Minnesota Department of Health