Table 1 Characteristics of ICU cohort (n = 17,922)

Age (year), mean, median (SD, IQR)

63.2, 65.2 (± 17.6, 51.3 to 77.6)

Female gender, n (%)

7,717 (43.10%)

Type of ICU, n (%)

Cardiac Care Unit

2,918 (16.28%)

Cardiothoracic Surgery Unit

3,824 (21.34%)

Medical Intensive Care Unit

6,536 (36.46%)

Surgical Intensive Care Unit

4,644 (25.91%)

Lab values on admission

Hematocrit (%), mean, median (SD, IQR)

32.3, 32.0 (± 5.6, 28.4 to 36.0)

SAPS on admission, mean, median (SD, IQR)

13.6, 13.0 (± 5.5, 10.0 to 17.0)

Comorbidities, n (%)

Anemia

4,225 (23.57%)

Chronic renal failure

3,641 (20.32%)

Congestive heart failure

3,301 (18.42%)

Peripheral vascular disease

1,347 (7.52%)

COPD

2,820 (15.73%)

Any cancer

2,887 (16.10%)

Diabetes

4,071 (22.71%)