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Table 3 Comparison of baseline characteristics according to ICC and WIND classifications

From: Validation of a new WIND classification compared to ICC classification for weaning outcome

Variables

ICC classification

WIND classification

Simple

(n = 503)

Difficult

(n = 145)

Prolonged

(n = 87)

P for trend

Group 1

(n = 617)

Group 2

(n = 186)

Group 3

(n = 217)

P for trend

Age, years

65 (53–72)

68 (55–75)

67 (55–75)

0.081

65 (54–73)

66 (56–74)

66 (54–73)

0.774

Sex, male

351 (69.8)

93 (64.1)

64 (73.6)

0.952

427 (69.2)

127 (68.3)

147 (67.7)

0.673

Underlying disease

 Malignancy

249 (49.5)

81 (55.9)

61 (70.1)

< 0.001

296 (48.0)

116 (62.4)

151 (69.6)

< 0.001

 Respiratory

135 (26.8)

42 (29.0)

31 (35.6)

0.106

163 (26.4)

57 (30.6)

82 (37.8)

0.002

 Neurologic

62 (12.3)

24 (16.6)

17 (19.5)

0.042

94 (15.2)

35 (18.8)

36 (16.6)

0.484

 Gastrointestinal

54 (10.7)

17 (11.7)

3 (3.4)

0.108

68 (11.0)

20 (10.8)

13 (6.0)

0.048

 Cardiovascular

76 (15.1)

17 (11.7)

10 (11.5)

0.239

92 (14.9)

21 (11.3)

24 (11.1)

0.108

 Genitourinary

74 (14.7)

17 (11.7)

10 (11.5)

0.292

90 (14.6)

12 (6.5)

21 (9.7)

0.014

Interval between hospital admission and ICU admission, days

1 (0–6)

1 (0–7)

3 (1–11)

0.001

1 (0–7)

2 (0–8)

3 (1–14)

< 0.001

Cause of respiratory failure

 Pneumonia

170 (33.8)

49 (33.8)

46 (52.9)

0.004

211 (34.2)

62 (33.3)

97 (44.7)

0.013

 Extrapulmonary sepsis

104 (20.7)

30 (20.7)

10 (11.5)

0.095

111 (18.0)

38 (20.4)

31 (14.3)

0.343

 ARDS

40 (8.0)

15 (10.3)

9 (10.3)

0.326

50 (8.1)

14 (7.5)

27 (12.4)

0.087

 CPR

31 (6.2)

8 (5.5)

2 (2.3)

0.204

39 (6.3)

11 (5.9)

9 (4.1)

0.259

 Coma

23 (4.6)

8 (5.5)

6 (6.9)

0.396

35 (5.7)

10 (5.4)

14 (6.5)

0.725

 Pulmonary edema

45 (8.9)

10 (6.9)

1 (1.1)

0.014

48 (7.8)

9 (4.8)

4 (1.8)

0.001

 Ventilatory failure

28 (5.6)

9 (6.2)

2 (2.3)

0.409

34 (5.5)

11 (5.9)

6 (2.8)

0.159

 Central airway obstruction

14 (2.8)

2 (1.4)

3 (3.4)

1.000

30 (4.9)

9 (4.8)

5 (2.3)

0.143

 Exacerbation of ILD

12 (2.4)

3 (2.1)

2 (2.3)

1.000

13 (2.1)

4 (2.2)

4 (1.8)

0.894

 Others

36 (7.2)

11 (7.6)

6 (6.9)

1.000

46 (7.5)

18 (9.7)

20 (9.2)

0.332

SAPS III on ICU admission

61 (50–73)

63 (54–76)

64 (53–77)

0.046

61 (50–73)

63 (54–76)

65 (55–76)

0.001

SOFA score on ICU admission

8 (5–11)

8 (5–11)

8 (5–11)

0.514

8 (5–11)

8 (5–11)

9 (5–12)

0.063

Interval between hospital admission and intubation, days

1 (0–8)

2 (0–8)

3 (1–14)

< 0.001

1 (0–8)

3 (1–10)

4 (1–16)

< 0.001

  1. ICC International Consensus Conference, WIND Weaning according to a New Definition, ICU intensive care unit, ARDS acute respiratory distress syndrome, ILD interstitial lung disease, CPR cardiopulmonary resuscitation, SAPS III Simplified Acute Physiology Score III, SOFA Sequential Organ Failure Assessment