Table 4

Comparison of area under receiver operator characteristic curves for the Charlson and Elixhauser comorbidity indices as predictors of mortality for different intensive care units

	30-day mortality			1-year mortality
	Elixhauser	Charlson	p Value	Elixhauser	Charlson	p Value
Burn ICU	0.62 (0.58 to 0.65)	0.63 (0.60 to 0.66)	0.11	0.73 (0.71 to 0.75)	0.73 (0.71 to 0.75)	0.57
CCU	0.65 (0.64 to 0.67)	0.64 (0.63 to 0.66)	0.17	0.72 (0.71 to 0.73)	0.71 (0.69 to 0.72)	0.002
CTICU	0.71 (0.69 to 0.73)	0.68 (0.66 to 0.70)	0.001	0.75 (0.74 to 0.77)	0.73 (0.72 to 0.75)	0.001
MICU	0.65 (0.64 to 0.67)	0.64 (0.63 to 0.65)	0.03	0.71 (0.70 to 0.72)	0.70 (0.69 to 0.71)	0.005
Neuro ICU	0.60 (0.58 to 0.61)	0.65 (0.63 to 0.66)	<0.001	0.68 (0.67 to 0.70)	0.73 (0.72 to 0.74)	0.005
SICU	0.68 (0.66 to 0.70)	0.66 (0.64 to 0.67)	0.001	0.73 (0.72 to 0.74)	0.72 (0.71 to 0.73)	0.050

Values represent area under the curve with 95% CIs in parentheses.