RT Journal Article SR Electronic T1 Incidence and prevalence of NMOSD in Australia and New Zealand JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 632 OP 638 DO 10.1136/jnnp-2016-314839 VO 88 IS 8 A1 Wajih Bukhari A1 Kerri M Prain A1 Patrick Waters A1 Mark Woodhall A1 Cullen M O‘Gorman A1 Laura Clarke A1 Roger A Silvestrini A1 Christine S Bundell A1 David Abernethy A1 Sandeep Bhuta A1 Stefan Blum A1 Mike Boggild A1 Karyn Boundy A1 Bruce J Brew A1 Matthew Brown A1 Wallace J Brownlee A1 Helmut Butzkueven A1 William M Carroll A1 Celia Chen A1 Alan Coulthard A1 Russell C Dale A1 Chandi Das A1 Keith Dear A1 Marzena J Fabis-Pedrini A1 David Fulcher A1 David Gillis A1 Simon Hawke A1 Robert Heard A1 Andrew P D Henderson A1 Saman Heshmat A1 Suzanne Hodgkinson A1 Sofia Jimenez-Sanchez A1 Trevor Killpatrick A1 John King A1 Christopher Kneebone A1 Andrew J Kornberg A1 Jeannette Lechner-Scott A1 Ming-Wei Lin A1 Christpher Lynch A1 Richard Macdonell A1 Deborah F Mason A1 Pamela A McCombe A1 Michael P Pender A1 Jennifer A Pereira A1 John D Pollard A1 Stephen W Reddel A1 Cameron Shaw A1 Judith Spies A1 James Stankovich A1 Ian Sutton A1 Steve Vucic A1 Michael Walsh A1 Richard C Wong A1 Eppie M Yiu A1 Michael H Barnett A1 Allan G Kermode A1 Mark P Marriott A1 John D E Parratt A1 Mark Slee A1 Bruce V Taylor A1 Ernest Willoughby A1 Robert J Wilson A1 Angela Vincent A1 Simon A Broadley YR 2017 UL http://jnnp.bmj.com/content/88/8/632.abstract AB Objectives We have undertaken a clinic-based survey of neuromyelitis optica spectrum disorders (NMOSDs) in Australia and New Zealand to establish incidence and prevalence across the region and in populations of differing ancestry.Background NMOSD is a recently defined demyelinating disease of the central nervous system (CNS). The incidence and prevalence of NMOSD in Australia and New Zealand has not been established.Methods Centres managing patients with demyelinating disease of the CNS across Australia and New Zealand reported patients with clinical and laboratory features that were suspicious for NMOSD. Testing for aquaporin 4 antibodies was undertaken in all suspected cases. From this group, cases were identified who fulfilled the 2015 Wingerchuk diagnostic criteria for NMOSD. A capture–recapture methodology was used to estimate incidence and prevalence, based on additional laboratory identified cases.Results NMOSD was confirmed in 81/170 (48%) cases referred. Capture–recapture analysis gave an adjusted incidence estimate of 0.37 (95% CI 0.35 to 0.39) per million per year and a prevalence estimate for NMOSD of 0.70 (95% CI 0.61 to 0.78) per 100 000. NMOSD was three times more common in the Asian population (1.57 (95% CI 1.15 to 1.98) per 100 000) compared with the remainder of the population (0.57 (95% CI 0.50 to 0.65) per 100 000). The latitudinal gradient evident in multiple sclerosis was not seen in NMOSD.Conclusions NMOSD incidence and prevalence in Australia and New Zealand are comparable with figures from other populations of largely European ancestry. We found NMOSD to be more common in the population with Asian ancestry.