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Ontario Stroke Registry: Acute Stroke Databases

The Ontario Stroke Registry (OSR) acute stroke databases include information on patients presenting with an acute transient ischemic attack (TIA) or stroke (including ischemic stroke, intracerebral hemorrhage, and subarachnoid hemorrhage) at participating acute care facilities in Ontario between 2001 and 2013.

The OSR acute stroke patient cohort includes patients assessed in an emergency department, those admitted directly to hospital or those admitted to hospital for another reason and experienced an in-hospital stroke.

The OSR acute stroke databases capture information on:

  • Patient demographics characteristics
  • Information related to the patient’s acute stroke or TIA event, including stroke severity
  • Pre-existing medical conditions and comorbidities
  • Patient medications
  • Emergency department and in-hospital investigations, consultations and treatments
  • In-hospital complications
  • Patient outcomes

OSR acute stroke data collection includes Regional Stroke Centre data and Ontario Stroke Audit (OSA) data. Currently, the two components include information on more than 116,000 stroke events.

Regional Stroke Centre Data

Collection of acute stroke data began in 2001 and progressed in four distinct phases:

  • Phases 1 and 2 (2001–2002), data collected from 21 and 24 hospitals respectively across Canada
  • Phases 3 and 4 (2003–2012), data collected from 11 Regional Stroke Centres in Ontario (Data was collected at one site in Nova Scotia between 2003 and 2007)

Both prospective and retrospective ascertainment of cases was performed in order to capture 100% of all consecutive, suspected stroke and TIA events at the participating institutions. The database currently contains information on more than 74,000 stroke events.

View features of Regional Stroke Centre Database (PDF, best viewed in Firefox)

Ontario Stroke Audit Acute Data

The Ontario Stroke Audit (OSA) acute stroke project is a population-based retrospective chart abstraction review that is performed every two years across the province beginning with discharges in 2002/03 and continuing to 2012/13. The project samples a proportion of patients with stroke or TIA who were seen in an emergency department or admitted to an acute care institution in Ontario; it collects the same data elements captured in the Regional Stroke Centre acute stroke database. Audited patients are identified by ICD-10 diagnostic codes for acute stroke and TIA from the Canadian Institute of Health Information’s Discharge Abstract Database (CIHI-DAD) and its National Ambulatory Care Reporting System (NACRS) database.

The periodic audits provide data on stroke care delivery across the entire province and can be analyzed by stroke region and by Local Health Integration Network (LHIN). The audits also collect acute care data on patients managed with the assistance of the Ontario Telestroke Program.

The Ontario Stroke Audit acute database contains information on approximately 42,000 stroke events.

View features of Ontario Stroke Audit Acute Database (PDF, best viewed in Firefox)

Ontario Stroke Registry
OSR Secondary Prevention Clinics (SPC) Databases