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Confusion assessment method (CAM) for the diagnosis of delirium*

Confusion assessment method (CAM) for the diagnosis of delirium*
Feature Assessment
  1. Acute onset and fluctuating course
Usually obtained from a family member or nurse and shown by positive responses to the following questions:
  • "Is there evidence of an acute change in mental status from the patient's baseline?"
  • "Did the abnormal behavior fluctuate during the day, that is, tend to come and go, or increase and decrease in severity?"
  1. Inattention
Shown by a positive response to the following:
  • "Did the patient have difficulty focusing attention, for example, being easily distractible or having difficulty keeping track of what was being said?"
  1. Disorganized thinking
Shown by a positive response to the following:
  • "Was the patient's thinking disorganized or incoherent, such as rambling or irrelevant conversation, unclear or illogical flow of ideas, or unpredictable switching from subject to subject?"
  1. Altered level of consciousness
Shown by any answer other than "alert" to the following:
  • "Overall, how would you rate this patient's level of consciousness?"
    • Normal = alert
    • Hyperalert = vigilant
    • Drowsy, easily aroused = lethargic
    • Difficult to arouse = stupor
    • Unarousable = coma
* The diagnosis of delirium requires the presence of features 1 AND 2 plus either 3 OR 4.
Graphic 69489 Version 3.0