Cerebrospinal fluid neurofilament light predicts longitudinal diagnostic change in patients with psychiatric and neurodegenerative disorders

Author:

Kang Matthew J. Y.ORCID,Eratne DhamidhuORCID,Dobson HannahORCID,Malpas Charles B.ORCID,Keem Michael,Lewis Courtney,Grewal Jasleen,Tsoukra Vivian,Dang ChristaORCID,Mocellin Ramon,Kalincik TomasORCID,Santillo Alexander F.ORCID,Zetterberg HenrikORCID,Blennow KajORCID,Stehmann ChristianeORCID,Varghese Shiji,Li Qiao-XinORCID,Masters Colin L.ORCID,Collins StevenORCID,Berkovic Samuel F.ORCID,Evans AndrewORCID,Kelso Wendy,Farrand SarahORCID,Loi Samantha M.ORCID,Walterfang MarkORCID,Velakoulis Dennis

Abstract

AbstractObjective:People with neuropsychiatric symptoms often experience delay in accurate diagnosis. Although cerebrospinal fluid neurofilament light (CSF NfL) shows promise in distinguishing neurodegenerative disorders (ND) from psychiatric disorders (PSY), its accuracy in a diagnostically challenging cohort longitudinally is unknown.Methods:We collected longitudinal diagnostic information (mean = 36 months) from patients assessed at a neuropsychiatry service, categorising diagnoses as ND/mild cognitive impairment/other neurological disorders (ND/MCI/other) and PSY. We pre-specified NfL > 582 pg/mL as indicative of ND/MCI/other.Results:Diagnostic category changed from initial to final diagnosis for 23% (49/212) of patients. NfL predicted the final diagnostic category for 92% (22/24) of these and predicted final diagnostic category overall (ND/MCI/other vs. PSY) in 88% (187/212), compared to 77% (163/212) with clinical assessment alone.Conclusions:CSF NfL improved diagnostic accuracy, with potential to have led to earlier, accurate diagnosis in a real-world setting using a pre-specified cut-off, adding weight to translation of NfL into clinical practice.

Publisher

Cambridge University Press (CUP)

Subject

Biological Psychiatry,Psychiatry and Mental health

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