Emergency Health Services

STEMI Mortality Rate for Ambulance Patients


The risk adjustments included control for fiscal year, quarter, age, sex, Charlson comorbidities, stroke type, previous inpatient admissions, atrial fibrillation, previous stroke/TIA, history of coronary artery disease, diabetes, peripheral vascular disease, hypertension, hyperlipidemia and arrival by ambulance.

Confidence Limit - The 95% confidence interval of the risk-adjusted mortality ratio. A confidence interval (CI) reflects the uncertainty surrounding the risk-adjusted mortality ratio. In the analyses presented in this document, the CI indicates that the true value of the risk-adjusted mortality ratio falls between the upper and lower confidence limits 19 times out of 20. The narrower a CI, the more one can be confident in the value of the risk-adjusted mortality ratio.

Stroke mortality rate for ambulance patients by LHIN is reported on a 3-year combined basis ending March 31st of the previous year.

Reporting period is based on three years of pooled data and updated annually.

Data Sources: Discharge Abstracts Database (DAD), MOHLTC SAS server; National Ambulatory Care Reporting System (NACRS).

For more information, please contact the Health Analytics Branch.


STEMI Mortality Rate for Ambulance Patients for Fiscal Year 2014/15 to 2016/17

LHIN Name Number of Ambulance ED Visits Risk-Adjusted 30-Day Mortality Ratio Lower Confidence Limit Upper Confidence Limit
Erie St. Clair 553 8.5% 5.9% 11.0%
South West 670 9.2% 7.1% 11.4%
Waterloo Wellington 331 16.1% 12.9% 19.3%
HNHB 1,541 9.1% 7.6% 10.7%
Central West 233 14.3% 10.5% 18.1%
Mississauga Halton 327 12.4% 9.2% 15.5%
Toronto Central 481 13.7% 11.2% 16.3%
Central 550 11.0% 8.6% 13.4%
Central East 616 10.7% 8.5% 12.9%
South East 473 8.5% 5.7% 11.2%
Champlain 664 9.3% 7.1% 11.5%
North Simcoe Muskoka 301 8.5% 5.1% 11.9%
North East 575 10.4% 7.9% 12.9%
North West 170 10.5% 5.9% 15.1%
Ontario 7,485 10.4% 9.7% 11.1%

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STEMI Mortality Rate for Ambulance Patients for Fiscal Year 2013/14 to 2015/16

LHIN Name Number of Ambulance ED Visits Risk-Adjusted 30-Day Mortality Ratio Lower
Confidence Limit
Upper Confidence Limit
Erie St. Clair 508 9.5% 6.8% 12.2%
South West 656 9.7% 7.5% 11.9%
Waterloo Wellington 353 13.7% 10.8% 16.6%
HNHB 1,600 8.7% 7.2% 10.1%
Central West 236 11.9% 8.0% 15.8%
Mississauga Halton 305 9.2% 6.0% 12.5%
Toronto Central 511 14.4% 12.0% 16.8%
Central 569 12.2% 9.9% 14.5%
Central East 649 11.4% 9.3% 13.6%
South East 451 6.4% 3.6% 9.2%
Champlain 681 9.4% 7.3% 11.5%
North Simcoe Muskoka 281 10.2% 6.7% 13.8%
North East 536 10.5% 7.9% 13.1%
North West 162 6.6% 1.9% 11.3%
Ontario 7,498 10.2% 9.6% 10.9%

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