Table 1 Case mix for admissions with haematological malignancy

Age, mean (SD)

57.5 (17.6)

Male, n (%)

4,638 (60.3)

APACHE II Acute Physiology Score, mean (SD)

17.1 (7.4)

APACHE II score, mean (SD)

24.4 (7.9)

ICNARC physiology score, mean (SD)

23.7 (11.4)

Number of organ system failures, mean (SD)

1.5 (1.2)

Ventilated at any time during the first 24 hours in the ICU, n (%)

4,244 (55.4)

Severe sepsis, n (%)

4,177 (54.3)

Physiology

   Lowest platelet count (× 10⁹/l), median (IQR)

74 (31 to 162)

   Lowest white blood cell count (× 10⁹/l), median (IQR)

6.7 (2.1 to 14.0)

Outcome

   Mortality, n (%)

Unit

3,312 (43.1)

Hospital^a

4,239 (59.2)

Activity

   Unit length of stay (days), median (IQR)

Survivor

2.5 (1.0 to 5.9)

Nonsurvivor

2.2 (0.7 to 6.3)

All

2.3 (0.9 to 6.1)

   Hospital length of stay (days)^a, median (IQR)

Survivor

27 (14 to 50)

Nonsurvivor

14 (5 to 29)

All

19 (9 to 38)

   Transferred in from another ICU, n (%)

166 (2.2)

   Readmission within the same hospital stay, n (%)

449 (5.8)

Hospital mortality by number of organ system failures, mortality (95% CI)

   0 organ failures

33.8 (31.4 to 36.2)

   1 organ failure

50.3 (48.3 to 52.4)

   2 organ failures

68.3 (66.1 to 70.4)

   3 organ failures

83.9 (81.5 to 86.1)

   4 organ failures

92.3 (89.3 to 94.6)

   5 organ failures

98.8 (93.7 to 99.9)