Table S1.

ICD-10 diagnostic groups, codes, and their description

Diagnostic groups	ICD-10 codes	Description
Multiple sclerosis	G35	Multiple sclerosis
Neuromyelitis optica spectrum disorders	G36.0	Neuromyelitis optica (Devic)
Acute disseminated encephalomyelitis	G04.0	Acute disseminated encephalitis
	G04.8	Other encephalitis, myelitis, and encephalomyelitis
	G04.9	Encephalitis, myelitis, and encephalomyelitis, unspecified
Transverse myelitis	G37.3	Acute transverse myelitis in demyelinating disease of the central nervous system
Optic neuritis	H46	Optic neuritis
Clinically isolated syndrome	G36.8	Other specified acute disseminated demyelination
	G36.9	Acute disseminated demyelination, unspecified
	G37.8	Other specified demyelinating diseases of the central nervous system
	G37.9	Demyelinating disease of the central nervous system, unspecified

Abbreviation: ICD-10, International Classification of Diseases revision 10.