Table 1.

International Classification of Diseases, Tenth Revision (ICD-10) codes for dementia and other chronic disease^adiagnoses in Danish health registers.

Diseases		ICD-10 codes
Dementia
	Alzheimer’s disease	F00.0, F00.1, F00.2, F00.9, G30.0, G30.1, G30.8, G30.9
	Vascular dementia	F01.0, F01.1, F01.2, F01.3, F01.8, F01.9
	Frontotemporal dementia	F02.0
	Dementia with Lewy bodies	G31.83
	Mixed dementia
	Parkinson’s disease	F02.08
	Dementia without specification	F03.9
Other chronic diseases
	Type 2 diabetes	E11
	Chronic obstructive pulmonary disease	J44
	Ischemic heart disease	I20–I25
	Depression	F32-F33
	Hypertension	I10, I15
	Stroke	I60-I69
	Atrial fibrillation	I48
	Asthma	J45

^aThe inclusion criteria for the chronic illness are based on the 10 most common chronic conditions among Danish patients [61], as well as prior studies that found that those diseases are both linked to dementia [62-67], and traffic accidents [42,68].