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Table 3 Summary of existing multicentre literature on case mix and outcomes for admissions to UK critical care units

From: Case mix, outcome and length of stay for admissions to adult, general critical care units in England, Wales and Northern Ireland: the Intensive Care National Audit & Research Centre Case Mix Programme Database

 

CMPD

ICS APACHE II Study in Britain and Ireland [20, 21]

European/ North American Severity Study Group* [22]

North Thames Region [23]

Scottish Intensive Care Society Audit Group [24]

South West Thames Region [25]

Admissions

129,647

9155

136

12,762

10,393

16,646

Units

128

26

4

15

22

17

Mean age

58.7

56.3

57.4

57.1

58.9

61

Male (%)

58.7

60.0

61.8

-

55.4

58.8

Surgical status (%)

      

   Nonsurgical

55.1

43.2

47.8

-

51.4

59.0

   Elective

26.0

21.2

24.3

-

21.3

25.1

   Emergency

18.7

25.6

27.9

-

27.3

15.9

APACHE II

      

   Mean score

16.5

17.9

-

-

-

15

   Mean probability

0.255

0.272

-

0.286

0.300

0.224

Mortality (%)

      

   Unit

20.3

17.9

-

23.7

20.5

18.3

   Hospital

28.6

27.7

32.4

32.5

29.4

26.6

  1. APACHE, Acute Physiology and Chronic Health Evaluation; CMPD, Case Mix Programme Database; ICS, Intensive Care Society; -, not available from published report(s). * UK admissions only selected from a multinational database