Table 1.

Baseline characteristics of patients with and without delirium

Clinical characteristic	Delirium (n=107)	No delirium (n=126)	P $
Age (years), mean±SD	60.30±18.15	51.52±20.16	0.001‡
Gender, n (%)
Male	55 (46.6)	63 (53.4)	0.831
Female	52 (45.2)	63 (54.8)
RASS at enrollment, median (IQR)	−1 (−2–0)	0 (0–0)	0.051†
APACHE IV, median (IQR)	54 (28–87)	40 (26–68)	0.009†
Mechanically ventilation at time of assessment, n (%)
Mechanically ventilated	69 (57.5)	51 (42.5)	<0.001
Nonmechanically ventilated	38 (33.6)	75 (66.4)
Received blood transfusion (n)	47	54	0.870
ICU type (n)
Medical	79	78
Surgical	22	29
Neurological	6	13
Other	0	6
Primary admitting diagnosis to ICU (n)
Sepsis	28	22
Respiratory	47	41
Neurologic	15	14
Cardiac	5	8
Surgery	3	11
Other	9	30
Location immediately prior to ICU admission (n)
Emergency department	56	65
Hospital ward	37	38
Operating room following surgery	5	9
ICU at outside hospital	6	9
Ward at outside hospital	1	3
Medications received (n)
Fentanyl	31	36
Propofol	5	6
Dexmedetomidine	9	5
Midazolam	8	11

^$P value has been calculated using Pearson Chi-Square test, ^‡P value has been calculated using Independent sample t-test, ^†P value has been calculated using nonparametric Mann–Whitney U-test, ^{^}P value has been calculated using Fisher’s exact test. SD: Standard deviation, RASS: Richmond Agitation–Sedation Scale, APACHE: Acute physiology and chronic health evaluation, ICU: Intensive care unit, IQR: Interquartile range