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Table 2 Resistive parameters in different groups

From: Non-linear parameters of specific resistance loops to characterise obstructive airways diseases

 

Healthy

Asthma

COPD

p value

(H vs. A)

p value

(H vs. C)

p value

(A vs. C)

Roundness

0.04 (0.03–0.07)

0.07 (0.04–0.09)

0.41 (0.17–0.58)

0.7900

<0.0001

<0.0001

Area of Loop

0.07 (0.05–0.10)

0.12 (0.08–0.16)

0.38 (0.21–0.51)

0.9189

<0.0001

<0.0001

Asynchrony, msec

10 (0–20)

15 (0–33)

70 (30–140)

0.9064

<0.0001

<0.0001

Point X, ml

−29 (−67–−15)

−26 (−79–−6)

−128 (−318–−48)

0.9999

0.0006

0.0005

Point Y, ml/sec

−243 (−470–−25)

−195 (−440–37)

−331 (−443–−209)

0.9653

0.5014

0.5014

b 0

5.66 (3.78–7.43)

5.77 (4.64–7.09)

1.51 (0.84–3.27)

0.9999

<0.0001

<0.0001

b 1

−8.88 (−11.8–−5.0)

−8.57 (−11.5–−5.6)

−2.36 (−4.43–−0.17)

0.8356

<0.0001

<0.0001

b 2

4.22 (2.39–5.21)

3.19 (1.10–4.97)

0.90 (−0.18–1.82)

0.9999

<0.0001

<0.0001

SSG, 1/sec

5.48 (4.62–6.21)

5.18 (4.11–6.16)

1.34 (0.62–2.61)

0.9999

<0.0001

<0.0001

Pole1

0.94 (0.90–0.97)

0.95 (0.89–0.97)

0.91 (0.82–0.96)

0.9999

0.4899

0.4068

Pole2

0.93 (0.80–0.96)

0.92 (0.59–0.95)

0.78 (0.53–0.91)

0.6674

0.0241

0.7444

sGAW, 1/ kPa*sec

1.32 (1.12–1.63)

1.09 (0.92–1.45)

0.40 (0.23–0.83)

0.9635

<0.0001

<0.0001

sG0.5 , 1/ kPa*sec

1.42 (1.15–1.57)

1.33 (1.24–1.47)

0.75 (0.49–1.14)

0.9999

<0.0001

<0.0001

  1. Values are median and IQR
  2. Definition of abbreviations: Point X Median point based on median volume shift values, Point Y Median point based on median flow values