This indicator measures the rate of acute care hospitalisations with at least one occurrence of unintended harm during a hospital stay that could potentially have been prevented, per 100 discharges.

A subset of the denominator: discharges with at least one occurrence of harm identified during the hospital stay.

Number of discharges from an acute care institution in a fiscal year.

• Discharges from Quebec acute care institutions • Records with admission category of stillbirths and cadaveric donors (Admission Category Code = R or S) • Discharges with invalid age, admission date or discharge date • Discharges with selected mental health diagnoses (i.e., most responsible diagnosis ICD-10-CA codes F10–F99). In Ontario, mental health discharges are submitted to the Ontario Mental Health Reporting System (OMHRS) and are therefore not in the Discharge Abstract Database (DAD). In order to create a standard hospital population, discharges with mental health disorders (with the exception of organic mental health disorders — ICD-10-CA codes F00–F09) were excluded from all provinces. • 2018–2019 data onward: Medical assistance in dying (MAID) (Discharge Disposition Code = 73)

None

By patient group; Surgical [MCC partition code = I (intervention)], Medical [MCC partition code = D (diagnosis)]

Discharge Abstract Database (DAD)

Online tool: Your Health System

www.cihi.ca/en/access-data-and-reports/indicator-library

www.cihi.ca/en/indicators/hospital-harm