Given the negative sequelae of delirium, current practice guidelines recommend routine delirium screening in the ICU with a validated screening tool such as the confusion assessment method for the ICU (CAM-ICU) or the Intensive Care Delirium Screening Checklist (ICDSC). (15-17) The ICDSC (Appendix 1) is an 8-item checklist producing a score between 0 and 8, where each item (corresponding to a value of 1 out of 8) reflects a DSM-IV (or alternative) diagnostic characteristic of delirium and has many advantages over the CAM-ICU. (15, 16, 18) The data are collected in real-time during each nursing shift. An ICDSC score ≥ 4 has been shown to highly correlate with a formal psychiatric diagnosis of delirium using DSM-IV criteria (sensitivity 99%, ROC curve area = 0.901), and has excellent inter-observer reliability between nurses and between nurses and critical care physicians.