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Table 5 Incidence of delirium in the critically ill using CAM-ICU, available published data since 2005

From: Routine delirium monitoring in a UK critical care unit

Country N Case mix APACHE II Incidence ICU
USA 2008
[30]
336 Ventilated > 12 hours MICU 26* 71 to 74%
28 days
Germany 2008
[31]
174 SICU including elective
% vent not available
25** 41%
USA 2007
[32]
304 MICU
54% ventilated
20 to 25** 70%
within 48 hrs
Sweden 2007
[33]
14 Ventilated 19** 48%
USA 2006
[11]
614 MICU
49% ventilated
20** 72% in 65 years or older
57% younger than 65 years
USA 2005
[34]
93 MICU ventilated 21* 47%
  1. Acute physiology and chronic health evaluation (APACHE) II *median **mean
  2. CAM-ICU = confusion assessment method for intensive care unit; ICU = intensive care unit; MICU = medical intensive care unit; SICU = surgical intensive care unit.