Emergency Health Services

Stroke Mortality Rate for Ambulance Patients

Fiscal Year 2019/20 to 2021/22
Fiscal Year 2018/19 to 2020/21
Fiscal Year 2017/18 to 2019/20
Fiscal Year 2016/17 to 2018/19
Fiscal Year 2015/16 to 2017/18
Fiscal Year 2014/15 to 2016/17
Fiscal Year 2013/14 to 2015/16

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 region is reported on a 3-fiscal 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), MOH SAS server; National Ambulatory Care Reporting System (NACRS).

For more information, please contact the Health Analytics and Insights Branch.

Stroke Methodology (Sample)

Stroke Mortality Rate for Ambulance Patients for Fiscal Year 2019/20 to 2021/22

Region Name	Number of Ambulance ED Visits	Risk-Adjusted 30-Day Mortality Ratio	Lower Confidence Limit	Upper Confidence Limit
Erie St. Clair	3,518	13.6%	12.5%	14.7%
South West	5,189	12.3%	11.4%	13.1%
Waterloo Wellington	3,214	14.0%	12.9%	15.2%
HNHB	7,032	13.3%	12.5%	14.0%
Central West	1,862	12.3%	10.9%	13.6%
Mississauga Halton	4,807	12.7%	11.8%	13.6%
Toronto Central	5,944	11.1%	10.4%	11.9%
Central	5,059	13.1%	12.3%	13.9%
Central East	6,151	12.9%	12.1%	13.7%
South East	3,209	12.5%	11.4%	13.7%
Champlain	5,775	13.6%	12.8%	14.4%
North Simcoe Muskoka	2,980	13.6%	12.4%	14.8%
North East	3,048	15.9%	14.6%	17.1%
North West	1,147	15.0%	13.0%	17.1%
Ontario	58,935	13.0%	12.8%	13.3%

Stroke Mortality Rate for Ambulance Patients for Fiscal Year 2018/19 to 2020/21

Region Name	Number of Ambulance ED Visits	Risk-Adjusted 30-Day Mortality Ratio	Lower Confidence Limit	Upper Confidence Limit
Erie St. Clair	3,634	13.5%	12.4%	14.6%
South West	5,133	12.7%	11.9%	13.6%
Waterloo Wellington	3,323	13.9%	12.9%	15.0%
HNHB	7,092	13.0%	12.3%	13.8%
Central West	1,896	12.0%	10.6%	13.4%
Mississauga Halton	4,817	12.4%	11.5%	13.3%
Toronto Central	6,024	11.3%	10.6%	12.0%
Central	4,993	13.0%	12.2%	13.8%
Central East	6,067	12.5%	11.7%	13.3%
South East	3,119	11.9%	10.7%	13.1%
Champlain	5,835	13.4%	12.6%	14.3%
North Simcoe Muskoka	3,039	13.7%	12.6%	14.9%
North East	2,956	15.2%	13.9%	16.4%
North West	1,141	14.5%	12.5%	16.5%
Ontario	59,069	12.9%	12.6%	13.1%

Stroke Mortality Rate for Ambulance Patients for Fiscal Year 2017/18 to 2019/20

Region Name	Number of Ambulance ED Visits	Risk-Adjusted 30-Day Mortality Ratio	Lower Confidence Limit	Upper Confidence Limit
Erie St. Clair	3,633	13.1%	12.3%	14.3%
South West	5,110	13.4%	12.9%	14.6%
Waterloo Wellington	3,378	14.7%	13.7%	15.9%
HNHB	7,101	13.6%	13.0%	14.4%
Central West	2,007	12.6%	10.9%	13.6%
Mississauga Halton	4,783	12.8%	11.5%	13.3%
Toronto Central	6,069	12.4%	10.1%	11.6%
Central	4,955	14.7%	12.1%	13.7%
Central East	6,053	12.6%	12.2%	13.8%
South East	3,017	11.3%	11.2%	13.6%
Champlain	5,892	12.5%	12.1%	13.8%
North Simcoe Muskoka	2,969	12.5%	12.6%	15.0%
North East	2,949	13.0%	13.7%	16.1%
North West	1,098	13.8%	13.5%	17.5%
Ontario	59,014	13.1%	12.8%	13.3%

Stroke Mortality Rate for Ambulance Patients for Fiscal Year 2016/17 to 2018/19

Region Name	Number of Ambulance ED Visits	Risk-Adjusted 30-Day Mortality Ratio	Lower Confidence Limit	Upper Confidence Limit
Erie St. Clair	3,643	12.6%	11.6%	13.7%
South West	5,039	14.0%	13.1%	14.9%
Waterloo Wellington	3,451	14.8%	13.7%	15.9%
HNHB	7,142	13.7%	13.0%	14.4%
Central West	2,100	12.7%	11.3%	14.0%
Mississauga Halton	4,546	12.3%	11.4%	13.2%
Toronto Central	6,062	10.5%	9.8%	11.3%
Central	4,971	12.5%	11.7%	13.3%
Central East	6,068	13.2%	12.4%	14.0%
South East	2,904	12.7%	11.5%	13.9%
Champlain	5,948	12.7%	11.9%	13.5%
North Simcoe Muskoka	2,891	14.7%	13.5%	15.9%
North East	2,924	14.2%	13.0%	15.5%
North West	1,125	16.5%	14.5%	18.4%
Ontario	58,814	13.0%	12.8%	13.3%

Stroke Mortality Rate for Ambulance Patients for Fiscal Year 2015/16 to 2017/18

Region Name	Number of Ambulance ED Visits	Risk-Adjusted 30-Day Mortality Ratio	Lower Confidence Limit	Upper Confidence Limit
Erie St. Clair	3,577	13.1%	12.1%	14.2%
South West	4,982	14.9%	14.0%	15.8%
Waterloo Wellington	3,419	15.2%	14.1%	16.3%
HNHB	7,063	14.2%	13.5%	15.0%
Central West	2,089	12.1%	10.8%	13.5%
Mississauga Halton	4,397	12.6%	11.7%	13.5%
Toronto Central	6,009	10.9%	10.2%	11.6%
Central	4,930	12.6%	11.8%	13.5%
Central East	6,033	13.8%	13.0%	14.6%
South East	2,805	14.4%	13.2%	15.6%
Champlain	5,779	12.7%	11.8%	13.5%
North Simcoe Muskoka	2,804	14.0%	12.8%	15.3%
North East	2,947	15.8%	14.6%	17.0%
North West	1,101	17.0%	15.0%	19.0%
Ontario	57,935	13.4%	13.2%	13.7%

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

Region 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%

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

Region 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%