Table 2: Risk factors for development of delirium.

With deliriumWithout delirium

Alcoholism, n (%)3 (12)15 (17.9)0.760+
Smoking, n (%)4 (16)18 (21.4)0.770+
Acute kidney injury at time of admission to the ICU, n (%)16 (64)37 (44)0.080
Mechanical ventilation at admission to the ICU, n (%)19 (76)54 (64.3)0.270+
Time with mechanical ventilation (days), median (IQR)8 (4–11)2 (1–10)0.010+
Use of sedative in the ICU, n (%)17 (68)50 (59.5)0.44
Use of benzodiazepines, n (%)9 (36)31 (36.9)0.930°
Use of mixed sedation, n (%)3 (12)2 (2.4)0.080+
Analgesic with opioids, n (%)22 (88)73 (87)0.999
Numerical Rating for Pain Scale2.5 (0.5–4.5)2.5 (0–5)0.860°
Behavioral Pain Scale3 (3–3)3 (3–3)0.930°
Use of steroids in the ICU, n (%)8 (32)23 (27.4)0.650
Use of vasopressor in the ICU, n (%)18 (72)57 (67.9)0.690
Transfusion during stay in the ICU, n (%)10 (40)41 (48.8)0.490
Use of antibiotic in the ICU, n (%)25 (100)78 (92.9)0.330
Time before admission to the ICU (days), median (IQR)4 (1–9.5)2 (1–13.5)0.510°
Time in the ICU (days), median (IQR)7 (2-5-13)2 (1–6.75)0.007°

ICU: intensive care unit; IQR: interquartile range; chi-squared; +Fisher’s exact; ° Mann–Whitney U.