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Table 2 Demographic variables of ICU-patients before and after implementation of CAM-ICU

From: Implementation of a delirium assessment tool in the ICU can influence haloperidol use

Period Prior to implementation
March to June 2006
Prior to implementation
March to June 2007
After implementation March to June 2008 P value
Number of patients 512 589 641  
Age 57.5 ± 16.4 58.9 ± 16.6 59.5 ± 15.6 N.S.
Gender (M/F) 339/173 370/219 409/232 N.S.
APACHE-II score 16.9 ± 7.0 17.1 ± 6.9 15.5 ± 6.5 0.0001
Length of stay on ICU in days (median (IQR)) 1.3 (0.8 to 5.9) 1.0 (1 to 5) 1.0 (1 to 3) N.S.
Admission type (n)     
   Elective surgery 214 (42%) 283 (48%) 340 (53%) N.S.
   'Urgent surgery 106 (20%) 96 (16%) 76 (12%)  
   Medical 192 (38%) 210 (36%) 225 (35%)  
  1. All values are means ± standard deviation unless otherwise reported.
  2. APACHE II = Acute Physiology and Chronic Health Evaluation II; CAM-ICU = confusion assessment method-intensive care unit; F = female; ICU = intensive care unit; IQR = interquartile range; M = male; N.S. = non-significant.