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Table 1 Case mix, outcome and activity of admissions following traumatic brain injury by type of unit

From: Case mix, outcomes and comparison of risk prediction models for admissions to adult, general and specialist critical care units for head injury: a secondary analysis of the ICNARC Case Mix Programme Database

Measures of case mix, outcome and activity

n (percent), mean (SD) or median (IQR)

Number of admissions, n (percent of database)

11,021 (3.0)

Age (years), mean (SD)

44.0 (19.9)

Reason for admission, n (percent)

 

   Primary brain injury

6,400 (58.1)

   Subdural haematoma

3,631 (32.9)

   Extradural haematoma

990 (9.0)

Admission following emergency surgery, n (percent)

2,233 (20.3)

First 24 h GCSa, mean (SD)

7.3 (4.5)

Pre-sedation GCSb, mean (SD)

6.8 (3.6)

APACHE II scorec, mean (SD)

14.3 (7.4)

Mortality, deaths (percent)

 

   ICU

2,534 (23.0)

   Hospitald

3,453 (33.5)

Length of stay (days), median (IQR)

 

ICU

 

   Survivors

3.2 (1.1–8.1)

   Non-survivors

1.6 (0.7–4.0)

Hospitald

 

   Survivors

24 (10–51)

   Non-survivors

3 (1–9)

  1. aAdmissions not sedated for the entire first 24 h. bAdmissions sedated for the entire first 24 h. cExcluding admissions staying <eight hours in the ICU. dExcluding readmissions within the same hospital stay. APACHE, Acute Physiology And Chronic Health Evaluation; GCS, Glasgow Coma Score; ICU, intensive care unit; IQR, interquartile range; SD, standard deviation.