TNF and delirium: These findings add to the body of evidence supporting use of biomarkers (Androsova et al., 2015), such as C-reactive protein (Zhang et al., 2014; Dillon et al., 2017), tumor necrosis factor (Kazmierski et al., 2014), and other interleukins (Westhoff et al., 2013) to predict risk of delirium during hospital admission in acutely ill patients.