NEFL and delirium: Similar to prior reports with the DRS, 3D-CAM-S raw scores correlated with worse performance on the Trail Making Test B (ρ=0.37, <i>P</i><0.001, <i>n</i>=177), slow-wave electroencephalogram power (ρ=0.3, <i>P</i>=0.001, <i>n</i>=73), and plasma neurofilament light (ρ=0.26, <i>P</i><0.05, <i>n</i>=61) and tau (ρ=0.41, <i>P</i><0.001, <i>n</i>=63).<h4>Conclusions</h4>The 3D-CAM-S severity scores correlated with DRS, delirium duration, and biomarkers of delirium.