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Table 1 Main characteristics of the study population

From: Noninvasive assessment of airflows by electrical impedance tomography in intubated hypoxemic patients: an exploratory study

Patients characteristics

All patients (n = 30)

PSV study (n = 10)

VCV study (n = 20)

p value PSV study vs. VCV study

Age, years

61 ± 12

60 ± 10

62 ± 13

0.729

Male sex, n (%)

17 (57)

5 (50)

12 (60)

0.602

SAPS II score at admission

50 ± 17

54 ± 19

48 ± 15

0.361

Etiology of AHRF, n (%)

0.168

 Pneumonia

16 (53)

5 (50)

11 (55)

 

 Septic shock

6 (20)

1 (10)

5 (25)

 

 Trauma

2 (7)

2 (20)

0

 

 Postoperative AHRF

3 (10)

2 (20)

1 (5)

 

 Other

3 (10)

0 (0)

3 (15)

 

ARDS on the day of the study, n (%)

13 (43)

5 (50)

8 (40)

0.602

Number of lung quadrants involved, n

2 [1–3]

2 [1, 2]

3 [2–4]

0.035

PaO2/FiO2

213 ± 56

241 ± 46

199 ± 57

0.053

Days on MV before study, n

1 [1–2]

2 [2–4]

1 [1–2]

0.055

In-hospital mortality, n (%)

9 (30)

2 (20)

7 (35)

0.398

  1. PSV, pressure support ventilation; VCV, volume-controlled ventilation; SAPS, simplified acute physiology score; AHRF, acute hypoxemic respiratory failure; ARDS, adult respiratory distress syndrome; PaO2/FiO2, oxygen partial arterial tension/inspired oxygen fraction; MV, mechanical ventilation