Table 1. Diagnosis of Delirium ^a,b.

DSM-IV-TR	CAM-ICU
Disturbed consciousness (eg, decreased ability to focus, sustain, or shift attention)	Feature 1: acute onset
Changes in cognition (eg, memory deficit, language disturbance) or accounted for by preexisting dementia	Feature 2: inattention
Disturbance develops over a short period of time and fluctuates	Feature 3: disorganized thinking
Evidence supports that the disturbance is directly caused by the patient's general medical condition	Feature 4: altered level of consciousness

^a Abbreviations: CAM, Confusion Assessment Method; DSM-IV-TR, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision; ICU, intensive care unit.

^b The patient exhibited signs that fulfilled all four criteria as described by DSM-IV-TR (left column). The diagnosis was also confirmed (right column) by the CAM-ICU, which requires the presence of features 1 and 2, and of either 3 or 4.