The age, gender and ethnic background of patients across all categories are shown.

A higher female: male ratio is observed in all groups. The majority of patients with NMO spectrum and ‘CRION’ pattern ON do not have a ‘white Caucasian’ ethnic background.1ON = optic neuritis, NMO = Neuromyelitis Optica, MS = Multiple Sclerosis, ‘CRION’ = ‘chronic relapsing inflammatory optic neuropathy’, ‘RION’ = Recurrent Isolated Optic Neuritis.2s.d. = standard deviation.