Keith Vodden Dr. Douglas Smith - Transports Canada

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Ontario Model • Pedestrian Injured in Collision/Non Collision Motor Vehicle Traffic Accident. • Pedal Cyclist Injured in Collision/Non Collision Motor Vehicle Traffic Accident. • Motorcycle Rider Injured in Collision/Non Collision Motor Traffic Accident. • Occupant of Three-Wheeled Motor Vehicle Injured in Collision/ Non Collision Motor Vehicle Traffic Accident. • Occupant of Car Injured in Collision/Non Collision Motor Traffic Accident. • Occupant of Pick-up Truck or Van Injured in Collision/Non Collision Motor Vehicle Traffic Accident. • Occupant of Heavy Transport Vehicle Injured in Collision/Non Collision Motor Vehicle Traffic Accident. • Occupant of Bus Injured in Collision/Non Collision Motor Vehicle Traffic Accident. • Other land transport accidents. We pooled the data for the two fiscal years using weights reflecting each fiscal year’s share among incidents for calendar year 2004. Hospital separations data from MOH&LTC were used to identify major injuries (those admitted to hospital). From the gross number of hospital separations, we subtract those who die in hospital (fatalities) or who were re-admitted for the same injury. This yields 5,293 unique persons who were injured in motor vehicle collisions, admitted to hospital and survived. This definition is most in keeping with the major injury category of ORSAR. The number of emergency room visits not requiring a hospital stay is also estimated using MOH&LTC data. From the total number of visits to an Emergency Room (ER) we select only those going to ER for an unplanned visit for a new clinical condition. From this number we subtract those who: • Leave without being seen, treated, or having completed treatment (included in minimal injuries). • Are admitted (major injury). • Die on or after arrival (fatalities). • Transfer to another care facility (possible duplicate in data). According to the MOT&LTC data a total of 60,726 individuals visit an emergency room and are released after care (comparable to minor injuries) as a result of motor vehicle collisions in 2004. Exhibit III-2 identifies the revised numbers of major injuries (hospital admittances) and minor injuries (treated in emergency room only) based on the better TNS Canadian Facts, Social and Policy Research 17
Analysis and Estimation of the Social Cost of Motor Vehicle Collisions in Ontario information available through MOH&LTC. It also identifies factors derived from the ORSAR and revised (MOH&LTC) numbers that are used by the model to adjust ORSAR-derived numbers for major and minor injuries for 2004 and subsequent years. Exhibit III-2 Revised Data and Adjustment Factors for Injuries in 2004 MOH&LTC Chipman-* Factors** based for 2004 Estimate and later 2004 2004 years (#) (#) 5,293 1.48 60,726 2.03 58,822 1.49 * See discussion on the calculation of minimal injuries in the following text. ** Factors for major and minor injuries are derived from MOH&LTC data, and for minimal injuries from a re-analysis of the Chipman analysis of the Ontario Health Survey. d) Additional minimal injuries The number of minimal injuries cannot be verified or adjusted using MOH&LTC data, as these injuries do not involve a hospital stay or an emergency room visit. Instead we use an analysis by Mary Chipman 1 of the 1990 Ontario Health Survey. No more recent study exists to help estimate the number of minimal injuries. However, given the age of the study one of the adjustments we make is to reflect the changed mix of injuries from motor vehicle collision in 2004 compared to 1990. We make a number of adjustments in the Chipman analysis to fit the needs of the social cost model. In brief these adjustments: • Adjust the proportion of injuries to pedestrians and cyclist to reflect the mix in motor vehicle collisions. The 1990 Ontario Health Survey used a broader definition of traffic collision that did not need to involve a motor vehicle. • Reduce the number of emergency room visits by 10% to estimate minor injuries. This reflects the proportion that becomes major injuries (hospital stays). Using estimates from the 1990 Ontario Health Survey of emergency room and hospital room use without adjustment would lead to double-counting otherwise. • Calculate minimal injuries as a residual by subtracting major and minor injuries from total injuries. • Adjust for the changing mix of injury severities between 1990 and 2004 motor vehicle collisions. 1 Chipman, Mary L., "Health Service Use Attributable to Injury in Traffic Crashes: Data from a Population Survey," 36th Annual Proceedings, Association for the Advancement of Automotive Medicine, October 5-7, 1992, Portland, Oregon. 18 TNS Canadian Facts, Social and Policy Research
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Ontario Sub-Models and Their Social
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APPENDIX D: VALUE OF HUMAN CONSEQUE
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APPENDIX E: REFERENCES Audrey, J. a
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