Thomas Perneger, MD, MPH; Michael J. Klag, MD, MPH
To the Editors: By developing the new confusion assessment method (CAM), Inouye and colleagues (1) contributed a much-needed tool for clinicians and clinical epidemiologists who work with elderly patients. However, we are concerned that their conclusion that "because the CAM is highly sensitive, rapid, and simple, it may be useful for widespread, daily assessment of delirium in persons in high risk settings" may be premature.
Although the CAM may take only 5 minutes to administer, it was based on at least a 20-minute assessment, including the Mini-Mental State Examination, the immediate story recall, an interview with another observer, and, at
Perneger T, Klag MJ. Clarifying Confusion. Ann Intern Med. 1991;114:991–992. doi: 10.7326/0003-4819-114-11-991_2
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Published: Ann Intern Med. 1991;114(11):991-992.
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