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Table 3 Univariate analysis of categorical variables at 1 h and 1 day after extubation

From: Prediction of survival time after terminal extubation: the balance between critical care unit utilization and hospice medicine in the COVID-19 pandemic era

 

Time to death < 1 h (76)

Time to death ≧ 1 h (64)

Statistics

Time to death < 1 d (105)

Time to death ≧ 1 d (35)

Statistics

n

%

n

%

χ2

pa

n

%

n

%

χ2

pa

Demographics

 Gender (male)

44

50.6

43

49.4

1.275

0.259

63

72.4

24

27.6

0.820

0.365

 Education (more than high school)

76

54.3

64

45.7

2.417

0.120

105

75.0

35

25.0

0.039

0.843

 Medical service

46

51.7

43

48.3

0.666

0.415

65

73.0

24

27.0

0.504

0.478

 Surgical service

30

58.8

21

41.2

0.666

0.415

40

78.4

11

21.6

0.504

0.478

 DNR signed before family meeting

76

54.3

64

45.7

0.259

0.611

105

75.0

35

25.0

2.143

0.143

Comorbidities

 Cerebrovascular disease

51

66.2

26

33.8

9.843

0.002

58

75.3

19

24.7

0.010

0.922

 Chronic respiratory disease

26

44.1

33

55.9

4.290

0.038

45

76.3

14

23.7

0.088

0.767

 Diabetes

32

56.1

25

43.9

0.133

0.751

40

70.2

17

29.8

1.194

0.275

 Congestive heart failure

40

52.6

36

47.4

0.183

0.669

55

72.4

21

27.6

0.614

0.433

 Chronic liver disease

23

53.5

20

46.5

0.016

0.900

32

74.4

11

25.6

0.011

0.916

 Advanced malignancy

22

41.5

31

58.5

5.610

0.018

39

73.6

14

26.4

0.091

0.763

 Renal failure

37

57.8

27

42.2

0.591

0.442

41

73.4

17

26.6

0.154

0.695

Physiological variables

 Organ donor consideration

4

50.0

4

50.0

0.063

1.000

5

62.5

3

37.5

0.707

0.412

 Nutrition within 24 h

57

51.8

53

48.2

1.259

0.262

81

73.6

29

26.4

0.509

0.476

 Dialysis within 3 days

12

60.0

8

40.0

0.307

0.580

15

75.0

5

25.0

0.000

1.000

 Presence of IABP

4

66.7

2

33.3

0.387

0.668

5

83.3

1

16.7

0.232

1.000

 SpO2 ≥ 96 (%)

35

46.1

41

53.9

4.541

0.033

50

65.8

26

34.2

7.522

0.006

 SpO2 ≥ 99 (%)

16

59.3

11

40.7

0.333

0.567

18

66.7

9

33.3

1.239

0.266

Respiratory variables

 Tracheostomy

4

40.0

6

60.0

0.886

0.512

7

70.0

3

30.0

0.144

0.711

 Minute ventilation ≥ 12 (L/min)

53

46.5

61

53.5

15.028

 < 0.001

81

71.7

33

28.9

5.101

0.024

 Spontaneous breathing trail in 24 h

5

8.8

52

91.2

80.255

 < 0.001

24

42.1

33

57.9

55.485

 < 0.001

Medications prior to extubation

 Opioids use in 24 h

54

54.8

47

46.2

0.098

0.754

76

75.2

25

24.8

0.012

0.913

 BZD use in 24 h

38

47.5

42

52.5

3.464

0.063

60

75.0

20

25.0

0.000

1.000

 Propofol use in 24 h

15

53.6

13

46.4

0.007

0.932

19

67.9

9

32.1

0.952

0.329

 Inotropic agents use in 12 h

21

84.0

4

16.0

10.828

0.001

25

100.0

0

0.0

10.145

0.001

APACHE II score at extubation

 â€‰â‰¥â€‰25

74

73.3

27

26.7

52.640

 < 0.001

80

79.2

21

20.8

3.424

0.064

 â€‰â‰¥â€‰30

55

80.9

13

19.1

37.690

 < 0.001

55

80.9

13

19.1

2.440

0.118

  1. ap values were calculated from the Pearson’s Chi-square test, bold = p-value < 0.05