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Table 1 Patient characteristics for the Holland study and the pooled data (including the Holland and Australian study)

From: Breath-synchronized electrical stimulation of the expiratory muscles in mechanically ventilated patients: a randomized controlled feasibility study and pooled analysis

 

Holland study

Pooled data (Holland + Australia)

All (N = 20)

Active (N = 10)

Sham (N = 10)

All (N = 40)

Active (N = 20)

Sham (N = 20)

Age, years

69.0 ± 8.5

72.2 ± 6.1

65.7 ± 9.6

63.4 ± 14

64.5 ± 14.9

62.4 ± 13.3

Sex, male/female

14/6

8/2

6/4

26/14

15/5

11/9

Body mass index, kg/m2

26.4 ± 4.4

25.9 ± 5.1

26.8 ± 3.8

26.4 ± 4.4

26.8 ± 4.5

26.5 ± 3.2

History of COPD, % (n/N)

50 (10/20)

60 (6/10)

40 (4/10)

25 (10/40)

30 (6/20)

20 (4/20)

MV duration at enrollment, days

2.5 ± 1.0

2.4 ± 1.0

2.5 ± 1.0

2.5 ± 0.8

2.5 ± 0.9

2.5 ± 0.8

FiO2 at study enrollment

0.42 ± 0.12

0.42 ± 0.09

0.42 ± 0.15

0.36 ± 0.13

0.34 ± 0.11

0.37 ± 0.15

Primary reason for MV, % (n/N)

      

 Cardiac arrest

5 (1/20)

0 (0/0)

10 (1/10)

2.5 (1/40)

0 (0/20)

5 (1/20)

 Pneumonia

50 (10/20)

40 (4/10)

60 (6/10)

30 (12/40)

25 (5/20)

35 (7/20)

 Postoperative

5 (1/20)

10 (1/10)

0 (0/0)

5 (2/40)

10 (2/20)

0 (0/20)

 Exacerbation COPD

25 (5/20)

30 (3/10)

20 (2/10)

12.5 (5/40)

15 (3/20)

10 (2/20)

 Neurologic dysfunction

10 (2/20)

10 (1/10)

10 (1/10)

32.5 (13/40)

40 (8/20)

25 (5/20)

 Sepsis

0 (0/0)

0 (0/0)

0 (0/0)

12.5 (5/40)

5 (1/20)

20 (4/20)

 Other

5 (1/20)

10 (1/10)

0 (0/0)

2.5 (2/40)

5 (1/20)

5 (1/20)

Successfully extubated during study, % (n/N)

60 (12/20)

80 (8/10)

40 (4/10)

65 (26/40)

80 (16/20)

50 (10/20)

  1. Values are presented as mean ± standard deviation, or as absolute or percentage number of patients
  2. COPD chronic obstructive pulmonary disease, FiO2 fraction of inspired oxygen, ICU intensive care unit, MV mechanical ventilation