학술논문
Associations of Peak-Width Skeletonized Mean Diffusivity and Post-Stroke Cognition.
Document Type
Article
Author
Jochems, Angela C. C.; Muñoz Maniega, Susana; Clancy, Una; Jaime Garcia, Daniela; Arteaga, Carmen; Hewins, Will; Penman, Rachel; Hamilton, Olivia K. L.; Czechoń, Agnieszka; Backhouse, Ellen V.; Thrippleton, Michael J.; Stringer, Michael S.; Bastin, Mark. E.; Valdés Hernández, Maria del C.; Wiseman, Stewart; Chappell, Francesca M.; Doubal, Fergus N.; Wardlaw, Joanna M.
Source
Subject
Language
ISSN
2075-1729
Abstract
Post-stroke cognitive impairment is common and can have major impact on life after stroke. Peak-width of Skeletonized Mean Diffusivity (PSMD) is a diffusion imaging marker of white matter microstructure and is also associated with cognition. Here, we examined associations between PSMD and post-stroke global cognition in an ongoing study of mild ischemic stroke patients. We studied cross-sectional associations between PSMD and cognition at both 3-months (N = 229) and 1-year (N = 173) post-stroke, adjusted for premorbid IQ, sex, age, stroke severity and disability, as well as the association between baseline PSMD and 1-year cognition. At baseline, (mean age = 65.9 years (SD = 11.1); 34% female), lower Montreal Cognitive Assessment (MoCA) scores were associated with older age, lower premorbid IQ and higher stroke severity, but not with PSMD (βstandardized = −0.116, 95% CI −0.241, 0.009; p = 0.069). At 1-year, premorbid IQ, older age, higher stroke severity and higher PSMD (βstandardized = −0.301, 95% CI −0.434, −0.168; p < 0.001) were associated with lower MoCA. Higher baseline PSMD was associated with lower 1-year MoCA (βstandardized = −0.182, 95% CI −0.308, −0.056; p = 0.005). PSMD becomes more associated with global cognition at 1-year post-stroke, possibly once acute effects have settled. Additionally, PSMD in the subacute phase after a mild stroke could help predict long-term cognitive impairment. [ABSTRACT FROM AUTHOR]