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Table 1 Demographic and clinical characteristics for ILOS>30 and ILOS<30 groups

From: Characteristics and outcomes of trauma patients with ICU lengths of stay 30 days and greater: a seven-year retrospective study

Characteristic

ILOS < 30 (n = 4716)

ILOS > 30 (n = 205)

P value

Age (in years)

48.3 ± 23.4 (Median = 45.0)

54.7 ± 21.6 (Median = 55.0)

<0.001*

Age ≥ 65 years (%)

1415/4716 (30)

80/205 (39)

0.006*

Gender (% male)

65.8

72.2

0.07

Mechanism of injury (% blunt)

93.7

95.1

0.5

Injury severity score

18.0 ± 11.2 (Median = 17.0)

28.4 ± 13.1 (Median = 26.0)

<0.001*

Glasgow coma score

12.3 ± 4.6 (Median = 15.0)

10.6 ± 5.3 (Median = 14.0)

<0.001*

Pre-existing conditions (%)

   

   Dialysis

0.5

0.5

1.0

   Cardiac

28.7

38.5

0.003*

   Renal

0.8

2.4

0.049*

   Pulmonary

7.4

13.2

0.003*

   Neurological

9.0

6.8

0.4

   Liver

1.1

0.5

0.6

   Warfarin use

4.4

3.4

0.6

   Diabetes

10.1

18.0

<0.001*

   Immunological

0.2

0.5

0.8

   Drug abuse

5.5

4.9

0.8

   Alcohol abuse

9.4

11.2

0.5

   Psychological

10.3

8.8

0.6

Complications (%)

   

   Arrest

0.8

7.3

<0.001*

   Pneumonia

5.2

54.1

<0.001*

   Sepsis

1.7

31.2

<0.001*

   Urinary tract infection

6.8

42.0

<0.001*

   Deep vein thrombosis

1.4

10.2

<0.001*

   Pulmonary embolus

0.6

2.9

<0.001*

   Myocardial infarction

1.1

5.4

<0.001*

   Arrhythmia

3.5

25.9

<0.001*

   Empyema

0.1

2.9

<0.001*

   Acute respiratory distress syndrome

2.1

43.4

<0.001*

   Renal

1.5

20.0

<0.001*

   Gastrointestinal bleed

0.7

9.3

<0.001*

   Liver

0.2

2.4

<0.001*

   Respiratory

6.9

45.9

<0.001*

   Dialysis

0.3

4.9

<0.001*

Mortality rate (%)

12.1

12.2

1.0

  1. *statistically significant.
  2. ILOS<30 = patients with intensive care unit length of stay less than 30 days; ILOS>30 = patients with intensive care unit length of stay greater or equal to 30 days.