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Tiffini Diage University of Wisconsin, Madison. Ignition Interlock Device Mandatory Sentencing. Objective. Ignition Interlock Device (IID) sentencing, impact on Wisconsin motor vehicle crashes? IID locks out vehicle ignition Breath sample >0.02% BAC Rolling re-test required.
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Tiffini Diage University of Wisconsin, Madison Ignition Interlock Device Mandatory Sentencing
Objective • Ignition Interlock Device (IID) sentencing, impact on Wisconsin motor vehicle crashes? • IID locks out vehicle ignition • Breath sample >0.02% BAC • Rolling re-test required
WI Alcohol Related MVC’s, 2007 • 17,847 people involved • Injuries - 4,190 • Hospitalizations - 991 • ED visits - 3199 • Deaths - 331 • 50% were sober victims *CODES Data provided by Wayne Bigelow; Center for Health Systems Research and Analysis, University of Wisconsin – Madison
Proposed Wisconsin OWI Law • Mandatory IID Sentencing Requirements • All repeat offenders (2nd offense or more) • All 1st time offenders with BAC > 0.15 • Offender pays $1,200 / device / year
Methods • Literature review – current evidence • Experience from other states • Impact analysis using Wisconsin data
Databases Reviewed, 2007 FARS = Fatal Accident Reporting System WI DOT = Wisconsin Department of Transportation
Results • Literature evidence • IID’s lower recidivism while device is installed (Risk Ratio 0.05 – 0.33) • Long-term effectiveness, uncertain • Experience from other states • New Mexico • 85% reduction in recidivism • 25% reduction in alcohol related crashes • California • Increase in non-alcohol related crashes with IID users compared on non-IID users
Wisconsin Data, 2007 • FARS – 142 fatal crashes • 30 with prior DUI’s (21%) • 27 were 1st offense, 3 were 2nd offense • CODES – 4,190 injuries • No information on priors or BAC • WI DOT - 40,260 DUI convictions • 23,689 1st offenders (58%) • 16,571 2nd – 13th repeat offense (42%)
Findings • Impact of IID law on WI public health? • Interaction with few fatal cases from 2007 • Large potential impact on repeat offenders • Low “in use” recidivism • Decrease drunk driving exposure • Reduction in risk of alcohol related crashes • Forward evaluation: IID data fields in CODES and FARS
Discussion/Considerations • Political motivation vs. evidence based intervention • Ideology of policy based intervention? • Punitive measure vs. prevention/treatment • Could IID compliment treatment approach? • Proper evaluation is required for public health assessment • Effectiveness, unintended consequences • Data communication – i.e. sentencing, manufacturer, law enforcement
Motor Vehicle Crash Data IID Data
Acknowledgements • Timothy E. Corden, MD • Steven Hargarten, MD • Injury Research Center staff • Sergeant William Brown, Milwaukee Co. Sheriffs OWI Task Force Leader • WI Department of Transportation staff • Wayne Bigelow; Center for Health Systems Research and Analysis, University of Wisconsin – Madison