Network impact score is an independent predictor of post-stroke cognitive impairment: a multicenter cohort study in 2341 patients with acute ischemic stroke.

Nick A. Weaver, Hugo P. Aben, Hugo J. Kuijf, Jill Abrigo, Hee-Joon Bae, Mélanie Barbay, Jonathan G. Best, Régis Bordet, Francesca M Chappell, Christopher P.L.H. Chen, Thibaut Dondaine, Ruben S. van der Giessen, Olivier Godefroy, Bibek Gyanwali, Olivia K.L. Hamilton, Saima Hilal, Irene M.C. Huenges Wajer, Yeonwook Kang, L. Jaap Kappelle, Beom Joon KimSebastian Köhler, Paul L.M. de Kor, Peter J. Koudstaal, Gregory Kuchcinski, Bonnie Y.K. Lam, Byung-Chul Lee, Keon-Joo Lee, Jae-Sung Lim, Renaud Lopes, Stephen Makin, Anne-Marie Mendyk, Vincent C.T. Mok, Mi Sun Oh, Robert J. Van Oostenbrugge, Martine Roussel, Lin Shi, Julie Staals, Maria Del Carmen Valdés Hernández, Narayanaswamy Venketasubramanian, Frans R.J. Verhey, Joanna M. Wardlaw, David J. Werring, Xu Xin, Kyung-Ho Yu, Martine J.E. van Zandvoort, Lei Zhao, Geert Jan Biessels, J.M. Biesbroek* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Background
Post-stroke cognitive impairment (PSCI) is a common consequence of stroke. Accurate prediction of PSCI risk is challenging. The recently developed network impact score, which integrates information on infarct location and size with brain network topology, may improve PSCI risk prediction.

Aims
To determine if the network impact score is an independent predictor of PSCI, and of cognitive recovery or decline.

Methods
We pooled data from patients with acute ischemic stroke from 12 cohorts through the Meta VCI Map consortium. PSCI was defined as impairment in ≥ 1 cognitive domain on neuropsychological examination, or abnormal Montreal Cognitive Assessment. Cognitive recovery was defined as conversion from PSCI < 3 months post-stroke to no PSCI at follow-up, and cognitive decline as conversion from no PSCI to PSCI. The network impact score was related to serial measures of PSCI using Generalized Estimating Equations (GEE) models, and to PSCI stratified according to post-stroke interval (<3, 3–12, 12–24, >24 months) and cognitive recovery or decline using logistic regression. Models were adjusted for age, sex, education, prior stroke, infarct volume, and study site.

Results
We included 2341 patients with 4657 cognitive assessments. PSCI was present in 398/844 patients (47%) <3 months, 709/1640 (43%) at 3–12 months, 243/853 (28%) at 12–24 months, and 208/522 (40%) >24 months. Cognitive recovery occurred in 64/181 (35%) patients and cognitive decline in 26/287 (9%). The network impact score predicted PSCI in the univariable (OR 1.50, 95%CI 1.34–1.68) and multivariable (OR 1.27, 95%CI 1.10–1.46) GEE model, with similar ORs in the logistic regression models for specified post-stroke intervals. The network impact score was not associated with cognitive recovery or decline.

Conclusions
The network impact score is an independent predictor of PSCI. As such, the network impact score may contribute to a more precise and individualized cognitive prognostication in patients with ischemic stroke. Future studies should address if multimodal prediction models, combining the network impact score with demographics, clinical characteristics and other advanced brain imaging biomarkers, will provide accurate individualized prediction of PSCI. A tool for calculating the network impact score is freely available at https://metavcimap.org/features/software-tools/lsm-viewer/.
Original languageEnglish
Article number103018
Number of pages7
JournalNeuroImage: Clinical
Volume34
Issue number103018
Early online date30 Apr 2022
DOIs
Publication statusPublished - 30 Apr 2022

Keywords

  • Post-stroke cognitive impairment
  • Brain connectomics
  • Ischaemic stroke
  • Dementia
  • Diffusion-weighted imaging

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