Cases that are new stroke events admitted to an acute care hospital, age 18 and older
A new event is defined as a first-ever hospitalization for stroke or a recurrent hospitalized stroke occurring more than 28 days after the admission for the previous event in the reference period.
1. Stroke present on admission (per codes specified below — coded as diagnosis type (1) or [type (M), (W), (X) or (Y), but not also as diagnosis type (2)]
Stroke diagnosis codes:
–Subarachnoid hemorrhage (ICD-10-CA: I60)
–Intracerebral hemorrhage (ICD-10-CA: I61, I62.9 [for data years prior to 2015–2016*])
–Ischemic stroke (ICD-10-CA: I63.0–I63.5, I63.8, I63.9, H34.1)
–Stroke, not specified as hemorrhage or infarction (ICD-10-CA: I64)
–Venous sinus/cortical vein thrombosis (ICD-10-CA: I63.6, I67.6, G08)
*I62.9 was used for coding hemorrhagic stroke not otherwise specified in fiscal years prior to 2015–2016. As of 2015–2016, this condition is coded to I61.9 Intracerebral haemorrhage, unspecified.
Transient ischemic attacks are not included in this indicator.
2. Age at admission 18 years and older
3. Sex recorded as male or female
4. Admission to an acute care institution (Facility Type Code = 1)
1. Records with an invalid health card number
2. Records with an invalid code for province issuing health card number
3. Records with an invalid admission date
4. Cadaveric donor or stillbirth records (Admission Category Code = R or S)
5. Stroke admissions within 28 days after the admission date of the previous stroke hospitalization