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Keith Vodden Dr. Douglas Smith - Transports Canada

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Analysis and Estimation of the Social Cost of Motor Vehicle Collisions in Ontario<br />

Exhibit A-11 Selected Medical Care (2004)<br />

Coroner trips<br />

Transportation<br />

Ground<br />

ambulance<br />

Air<br />

ambulance<br />

Water<br />

ambulance<br />

ER visit<br />

Hospital days<br />

(#) (#) (#) (#) (#) (patient-days)<br />

All within category:<br />

Fatalities 422 391 32 3 373 1,939<br />

Major 5,075 417 43 4,642 47,914<br />

Minor 29,930 65,704<br />

Minimal* 484<br />

TOTALS 422 35,397 450 47 71,203 49,853<br />

Factors by individual:<br />

Fatalities 0.519 0.481 0.040 0.004 0.458 2.385<br />

Major 0.962 0.079 0.008 0.879 9.077<br />

Minor 0.493 1.082<br />

Minimal* 0.008<br />

* ER visits that are incomplete are assigned to minimal injuries. Incomplete ER visits are weighted to<br />

reflect the extent of completeness depending on the extent of services received before the individual left the<br />

ER.<br />

a) Transport of those injured<br />

Ambulance use data are available from MOH&LTC. Based on data for 2003/2004<br />

and 2004/2005 we estimate 35,397 ground, 450 air, and 47 water ambulance trips for<br />

2004 based on a proportionate weighting of the data for the two fiscal years. These<br />

aggregate data allow reasonable allocation across injury severity categories with the<br />

following assumptions:<br />

• Each fatality and major injury is transported.<br />

• Ambulance trips involving a combination of methods (a small minority in the<br />

data) are assumed to all involve ground transport and to involve air or water<br />

ambulances as well in proportion to individual air and water ambulance use in the<br />

data.<br />

• Air and water ambulance are allocated according to the proportionate share of<br />

fatalities and major injuries. All remaining fatalities and major injuries transported<br />

by ambulance to hospital are assigned a ground ambulance trip.<br />

• Fatalities not transported to hospital are assumed transported by the Coroner.<br />

• Ground ambulance trips not allocated in the above are assigned to individuals<br />

with minor injuries. This includes those transported a second time to another<br />

facility (day surgery, clinic, or another emergency department).<br />

132 TNS Canadian Facts, Social and Policy Research

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