Table 1.

Outcomes defined by ICD codes in the Norwegian Stroke Registry and the Norwegian Patient Registry

Outcome	ICD-10 code
Stroke	I61, I63, I64
AF and flutter	I48
Non-traumatic subarachnoid haemorrhage	I60
Vascular dementia	F01
Myocardial infarction	I21–I22
Heart failure	I50
Gastrointestinal haemorrhages	K25–K29, K92.0–K92.2
Other haemorrhages	K62.5, J66.1, I85.0, I98.3, N02, N93.9, N95.0, N50.1A, H11.3, H31.3, H35.6, H43.1, H45.0, H92.2, I31.2, J94.2, M25.0, R04, R58, D62.9