All inflammatory parameters were consistently higher in subjects with delirium than those without delirium: the leukocyte count was almost twice as high (median values: 13,205/μl vs. 7,715/μl), CRP was twice as high (18.3 mg/dl vs. 8.9 mg/dl), PCT more than four times as high (0.53 ng/ml vs. 0.12 ng/ml) and IL-6 almost five times as high (127 pg/ml vs. 27 pg/ml). This evidence concerns the gene IL6 and delirium.