Table 1 Patient characteristics in this study, the E-PRE-DELIRIC development dataset [1] and other validation studies [2,3,4]

Admissions during study period, n

2445

–

2802

803

Included in analysis, n (%)

1746 (71.4)

1962 (–)

2178 (77.7)

455 (56.7)

Delirium, n (%)

763 (43.7)

481 (24.5)

466 (21.4)

160 (35.2)

Age (years), mean (Q1–Q3, min/max)

58.6 (47.0–71.8, 18/94)

61.7 (53–74, 18/95)

62.1 (–)

66.7 (49.0–77.3, –/–)

Male, n (%)

1010 (57.8)

1166 (59.4)

1324 (60.8)

241 (53.0)

 Surgery

813 (46.6)

1019 (51.9)

1079 (49.5)

–

 Medicine

837 (47.9)

683 (34.8)

859 (39.3)

–

 Trauma

33 (1.9)

90 (4.6)

86 (4.0)

–

 Neurology/neurosurgery

63 (3.6)

170 (8.7)

157 (7.2)

–

Urgent admission, n (%)

1534 (87.9)

1163 (59.3)

1345 (61.8)

–

APACHE II

20.0 (mean)

–

17.4 (mean)

16 (median)

ICU LoS (days), median (Q1–Q3, min/max)

4.5 (2.4–10.0, 1.0/184.0)

2.0 (1–6, 1/133)

3.0 (2–6, 1/96)

2.6 (1.5–4.4, –/–)

ICU mortality, n (%)

210 (12.0)

–

–

17 (3.7)