Incidence and risk factors for delirium in cardiac surgery intensive care unit patients: A single-center study

Table 2 Delirium status and clinical outcome

Parameters	All (n = 202)	No delirium (n = 143)	Delirium (n = 59)	P value
RASS scale				< 0.001
-5 to -4	0 (0)	0 (0)	0 (0)
-3 to -1	13 (6.4)	7 (4.9)	6 (10.2)
0	145 (71.8)	125 (87.4)	20 (33.9)
> 1	44 (21.8)	11 (7.7)	33 (55.9)
Day of onset of delirium (days)	0 (0-1)	0 (0-0)	2 (1-2)	< 0.001
Duration of delirium (days)	0 (0-1)	0 (0-0)	1 (1-2)	< 0.001
Hemodialysis in the ICU	5 (2.5)	1 (0.7)	4 (6.8)	0.023
Duration of anesthesia from ICU to awakening (minute)	360 (270-540)	300 (240-450)	540 (300-900)	< 0.001
Duration of total anesthesia/sedation (minute)	600 (484-842)	544 (480-713)	960 (562-1141)	< 0.001
Duration of mechanical ventilation (minute)	779 (586-1154)	717 (480-931)	1230 (774-1696)	< 0.001
Reintubation	7 (3.5)	0 (0)	7 (11.9)	< 0.001
ICU acquired weakness	15 (7.4)	3 (2.1)	12 (20.3)	< 0.001
Length of ICU (days)	2 (2-4)	2 (2-3)	4 (3-6)	< 0.001
ICU outcome				0.272
Improvement	190 (94.1)	138 (96.5)	52 (88.1)
Death	1 (0.5)	0 (0)	1 (1.7)

Continuous variables with a non-normal distribution as median and interquartile range (25^th-75^th percentile). Categorical variables are shown as n (%). RASS: Richmond Agitation-Sedation Scale; ICU: Intensive care unit.