Interleukin-6 was increased in patients with delirium [54.6 (31.0,87.8) pg/ml vs. 14.7 (7.4,50.6) pg/ml, p = 0.03 at day 3 and 63.6 (20.2, 214.5) pg/ml vs. 11.0 (5.3, 27.6) pg/ml, p < 0.001 at day 7]. The gene discussed is IL6; the disease is delirium.