UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Association between plasma tau and postoperative delirium incidence and severity: a prospective observational study

Ballweg, T; White, M; Parker, M; Casey, C; Bo, A; Farahbakhsh, Z; Kayser, A; ... Sanders, RD; + view all (2021) Association between plasma tau and postoperative delirium incidence and severity: a prospective observational study. British Journal of Anaesthesia , 126 (2) pp. 458-466. 10.1016/j.bja.2020.08.061.

[img] Text
Zetterberg_Association between plasma tau and postoperative delirium incidence and severity- a prospective observational study_AAM.pdf - Accepted version
Access restricted to UCL open access staff until 21 November 2021.

Download (199kB)

Abstract

BACKGROUND: Postoperative delirium is associated with increases in the neuronal injury biomarker, neurofilament light (NfL). Here we tested whether two other biomarkers, glial fibrillary acidic protein (GFAP) and tau, are associated with postoperative delirium. METHODS: A total of 114 surgical patients were recruited into two prospective biomarker cohort studies with assessment of delirium severity and incidence. Plasma samples were sent for biomarker analysis including tau, NfL, and GFAP, and a panel of 10 cytokines. We determined a priori to adjust for interleukin-8 (IL-8), a marker of inflammation, when assessing associations between biomarkers and delirium incidence and severity. RESULTS: GFAP concentrations showed no relationship to delirium. The change in tau from preoperative concentrations to postoperative Day 1 was greater in patients with postoperative delirium (P<0.001) and correlated with delirium severity (ρ=0.39, P<0.001). The change in tau correlated with increases in IL-8 (P<0.001) and IL-10 (P=0.0029). Linear regression showed that the relevant clinical predictors of tau changes were age (P=0.037), prior stroke/transient ischaemic attack (P=0.001), and surgical blood loss (P<0.001). After adjusting for age, sex, preoperative cognition, and change in IL-8, tau remained significantly associated with delirium severity (P=0.026). Using linear mixed effect models, only tau (not NfL or IL-8) predicted recovery from delirium (P<0.001). CONCLUSIONS: The change in plasma tau was associated with delirium incidence and severity, and resolved over time in parallel with delirium features. The impact of this putative perioperative neuronal injury biomarker on long-term cognition merits further investigation. CLINICAL TRIAL REGISTRATION: NCT02926417 and NCT03124303.

Type: Article
Title: Association between plasma tau and postoperative delirium incidence and severity: a prospective observational study
Location: England
DOI: 10.1016/j.bja.2020.08.061
Publisher version: https://doi.org/10.1016/j.bja.2020.08.061
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: biomarker, delirium, glial fibrillary acidic protein, inflammation, neuronal injury, postoperative, surgery, tau
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Neurodegenerative Diseases
URI: https://discovery.ucl.ac.uk/id/eprint/10119325
Downloads since deposit
1Download
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item