. 2013 Apr-Jun;25(2):137–147. doi: 10.5935/0103-507X.20130025

Table 1.

Comparison between different studies on the prevalence of delirium in intensive care units

Author	Local	Type of ICU	Scale used	Prevalence (%)	*Length of stay (days) (D versus ND)**		Mortality (%) (D versus ND)
Author	Local	Type of ICU	Scale used	Prevalence (%)	ICU	Hospital	Mortality (%) (D versus ND)
Salluh et al.⁽⁵⁾	North and South America (11 countries); Spain	104 UCI (DECCA Study)	CAM-ICU	32.2	22 (11-40) versus 7 (4-18) (p< 0.0001)	-	20 versus 5.7 (p=0.002) - ICU 24 versus 8.3 (p=0.0017) - Hospital
Dubois et al.⁽⁷⁾	Montreal, Canada	Medical-surgical	ICDSC	19	9.3±12 versus 7±7.9 (p=0.14)	-	15 versus 13.6 (p=0.82) - ICU
Ely et al.⁽⁸⁾	Tennessee, United States	Medical and coronary	CAM-ICU	87	7 (4-15.5) versus 5 (2-7) (p=0.009)	21 (12-25) versus 11 (7-14) (p<0.001)	34 versus 15 (p=0.008) Mortality at 6 months
Ouimet et al.⁽⁹⁾	Montreal, Canada	Medical-surgical	ICDSC	35.2	10.8±11.3 versus 2.5±2.1 (p<0.0001)	36.4±28.9 versus 31.6±46.5 (p=0.0001)	15.9 versus 2.4 (p<0,0001) - ICU 41.6 versus 20.8 (p<0.0001) - Hospital
Ouimet et al.⁽¹⁰⁾	Montreal, Canada	Medical-surgical	ICDSC	31.8	11.5±11.5 versus 4.4±3.9 (p≤0.005)	18.2±15.7 versus 13.2±19 (p≤0.005)	20 versus 10 (p<0.005) - ICU 31 versus 24 (p<0.005) - Hospital
van den Boogaard et al.⁽¹¹⁾	Nijmegen, Low Countries	Polyvalent	CAM-ICU	26	6 (2-13) versus 1 (1-2) (p<0.0001)	20 (10-20) versus 7 (5-14) (p<0.0001)	18 versus 3 (p<0.0001) - Hospital

D - delirium; ND - no delirium; ICU - intensive care unit; * 95% confidence interval.