Table 2 Patients characteristics, initial management and respiratory impedance by age

3 (27%)

3 (42.86%)

0 (0%)

0.181

6 (4.5–6.5)

6 (5–7)

6 (3–6)

0.309

8 (8.0–8.0)

8 (8.0–8.75)

7.5 (6.5–8.0)

0.072

6 (6–13)

13 (6–15)

5 (4–7)

0.104

24 (17.75–35.25)

24 (17.25–52.50)

24 (19.25–30.25)

0.872

3 (30%)

3 (50%)

0 (0%)

0.181

0.455

6 (50%)

2 (33%)

4 (66.67%)

5 (41%)

2 (33%)

3 (50%)

1 (8%)

1 (16.67%)

0 (0%)

1.000

9 (75%)

5 (83.33%)

4 (66.67%)

3 (25%)

1 (16.67%)

2 (33.33%)

9.33 (7.41–12.66)

12.73 (10.59–14.75)

7.26 (6.78–8.20)

0.25 (−0.03–1.19)

1.43 (0.48–1.94)

−0.04 (0.12 - -0.31)

0.015

8.95 (1.90–27.34)

31.74 (11.08–49.09)

1.2 (−6.28–8.99)

0.041

−20.83 (−29.78- -4.46)

−20.83 (−25.70- -16.91)

−14.54 (− 31.31 - -2.9)

0.930

−0.46 (−2.65–3.74)

−0.46 (− 0.98 - -0.45)

−0.06 (−4.62–13.79)

0.662

−4.39 (−5.98- -2.37)

−6.01 (− 6.80- -5.58)

−2.17 (− 2.91- -1.21)

−1.36 (− 2.87–0.31)

−3 (− 3.85 - -2.61)

0.33 (− 0.19–0.94)

0.002

1.35 (− 2.87 - -0.03)

2.95 (− 3.89- -2.62)

−0.07 (− 0.28–0.83)

0.002

31.86 (− 54.25 - -10.62)

33.59 (− 34.98 - -31.85)

17.85 (− 65.75- -0.40)

0.536

− 0.55 (− 0.92–0.16)

− 0.62 (− 0.67 - -0.55)

−0.22 (− 2.19–0.20)

0.536

68.04 (32.61–101.37)

111.49 (82.41–139.61)

30.46 (12.59–45.77)

1.44 (0.32–2.68)

2.86 (2.03–3.75)

0.04 (− 1.10–0.63)

0.002

97.62 (18.0–145.79)

156.43 (112.58–239.54)

3.77 (− 53.61–52.06)

0.004

−32.25 (− 65.8- -10.24)

−32.93 (− 61.74 - -32.25)

− 10.24 (− 72.18–2.42)

0.428

−0.48 (− 1.15- -0.25)

− 0.48 (− 0.74- -0.37)

−0.41 (− 3.12 - -0.06)

0.792