Table 1: Patient characteristics.

Patient Characteristics

All Patients (n = 101)

Successful Extubation (n = 90)

Failed Extubation (n = 11)

p value

Median SD

Median SD

Median SD

Age (years)

69 14.14

68 14.50

72 10.82

0.56

BMI

23.33 3.33

23.31 3.47

23.7 1.81

0.87

APACHE II Score

19 7.73

18.5 7.89

22 6.44

0.49

SAPS II score

52 12.02

52 12.32

52 8.48

0.36

Mechanical Ventilation (days)

4 3.70

4 3.43

5 5.4

0.14

Pulse Rate (min)

88 19.75

88 9.48

89 18.9

0.68

Breath Rate (min)

22 5.53

21.5 5.39

24 6.73

0.31

RSBI

54 25

56.5 23.94

47 33.33

0.27

PiMax (-)

30 9.98

30 10.00

36 10.09

0.59

VT (ml)

389 172.02

382.50 175.22

459 149.81

0.58

Hemoglobin (g/dL)

10.7 1.74

10.9 1.75

9.1 1.10

0.002

Hematocrit (%)

32.10 5.06

32.7 5.05

28.1 2.95

0.001

ICU stay (days)

7 7.04

6 5.52

22 7.78

< 0.001

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RSBI: rapid shallow breath index; PiMax: maximal inspiratory pressure; VT: tidal volume; ICU: intensive care unit