Emergency Health Services

Stroke 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.


Stroke 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 3,618 13.4% 12.3% 14.4%
South West 4,735 14.8% 13.9% 15.7%
Waterloo Wellington 3,337 15.9% 14.8% 17.0%
HNHB 6,958 13.8% 13.0% 14.5%
Central West 2,043 12.2% 10.8% 13.6%
Mississauga Halton 4,168 12.5% 11.6% 13.5%
Toronto Central 5,986 11.5% 10.8% 12.3%
Central 4,922 12.5% 11.6% 13.3%
Central East 5,959 13.7% 12.9% 14.5%
South East 2,742 14.9% 13.7% 16.2%
Champlain 5,600 13.0% 12.2% 13.9%
North Simcoe Muskoka 2,738 14.9% 13.6% 16.1%
North East 2,959 15.6% 14.4% 16.8%
North West 1,095 15.8% 13.7% 17.8%
Ontario 56,860 13.5% 13.3% 13.8%

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Stroke 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 3,601 13.7% 12.6% 14.8%
South West 4,534 14.6% 13.6% 15.5%
Waterloo Wellington 3,129 14.7% 13.6% 15.9%
HNHB 6,761 13.4% 12.6% 14.2%
Central West 1,929 12.5% 11.1% 13.9%
Mississauga Halton 4,076 12.4% 11.5% 13.4%
Toronto Central 5,907 11.2% 10.4% 11.9%
Central 4,691 12.6% 11.7% 13.4%
Central East 5,686 14.0% 13.2% 14.9%
South East 2,698 16.0% 14.8% 17.3%
Champlain 5,262 12.7% 11.9% 13.6%
North Simcoe Muskoka 2,675 13.2% 12.0% 14.4%
North East 2,905 15.4% 14.1% 16.6%
North West 1,061 14.0% 12.0% 16.1%
Ontario 54,915 13.3% 13.1% 13.6%

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