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Table 4 Univariate analyses of characteristics of patients at discharge, by survival status.

From: Stratification of the severity of critically ill patients with classification trees

Variable

Survivors

(n = 1302)

Non-survivors

(n = 578)

p-value

SCORE

Age (years)

51.2 (19)

63.8 (16)

< 0.001

1,2,3

HR (ppm)

104.7 (29)

115.0 (31)

< 0.001

1,2

MAP (mmHg)

82.8 (28)

72.4 (32)

< 0.001

1,2

Inotropic therapy (%)

25.0

52.7

< 0.001

3

Glasgow

13.4 (3)

11.8 (5)

< 0.001

1,2,3

Intracranial mass (%)

3.0

6.3

0.001

3

FiO2

0.49 (0.2)

0.62 (0.2)

< 0.001

1,2

(A-a)O2 gradient (mmHg)

212.3 (143)

304.5 (176)

< 0.001

1,2

MV (%)

53.6

79.9

< 0.001

3

CO3H (mEq/L)

23.4 (5)

22.1 (6)

< 0.001

1,2

pH

7.36 (0.1)

7.34 (0.1)

< 0.001

1,2

Urine output (cc/24 h)

2124 (1058)

1778 (1398)

< 0.001

2

Urea (mg/dL)

50.8 (41)

76.5 (53)

< 0.001

2

Creatinin (mg/dL)

1.34 (1.3)

1.81 (1.4)

< 0.001

1,3

Sodium (mEq/L)

139.5 (5)

140.5 (7)

0.015

1,2

Acute renal failure (%)

14.1

31.9

< 0.001

3

Urine output < 150 cc/8 h (%)

3.3

17.3

< 0.001

3

Temperature (°C)

38.2 (13)

38.3 (14)

0.036

1,2

Infection (%)

28.8

46.9

< 0.001

3

Coagulopathy (%)

9.7

17.1

< 0.001

3

COI (%)

11.7

26.0

< 0.001

1,2,3

Elective (%)

7.7

2.7

< 0.001

1,2,3

Trauma (%)

36.6

23.2

< 0.001

 

Surgery (%)

30.2

44.8

0.001

 
  1. Development set.
  2. HR: Heart rate; MAP: Mean arterial pressure; (A-a)O2 gradient: Alveolar-arterial oxygen gradient; MV: Mechanical ventilation; COI: Chronic organ insufficiency; MORT: Hospital mortality; Data presented as the mean (SD) or percentages.
  3. SCORE: (1) APACHE II, (2) SAPS II and (3) MPM II 24.
  4. p: Determined by χ2 test for percentages or Mann-Whitney test for comparison of medians.