Table 1.

Chronic medical diseases/conditions according to ICD-10 considered relevant to multimorbidity in this study

Disease	ICD-10 code
Tuberculosis	A15–A19
Herpes zoster	B02
Human immunodeficiency virus	B20–B24
Cancer	C00–C97
Thyroidal diseases	E00–E07
Diabetes	E10–E14
Metabolic diseases	E65–E68
Hyperlipidaemia	E78
Mental health problems	F00–F99
Epilepsy	G40
Cardiovascular disease	I00–I09, I16–I99
Hypertension	I10–I15
Chronic obstructive pulmonary disease	J44
Asthma	J45–J46
Bronchiestasis	J47
Gastro-oesophageal reflux	K21
Psoriasis	L40
Rheumatoid arthritis	M05–M14
Osteoarthritis	M15–M19
Ankylosing spondylitis	M45
Chronic back pain	M53–M54
Fibromyalgia/myalgia	M79
Osteoporosis	M80–M82
Other chronic musculoskeletal problems	M00–M03, M20–M43, M46–M51, M60–M77, M83–M99
Renal disease	N18–N19