Table 2 Forced Oscillation Physiological Parameters.

From: Comparison of Forced and Impulse Oscillometry Measurements: A Clinical Population and Printed Airway Model Study

 

Healthy controls (n = 14)

Asymptomatic smokers (n = 17)

Asthma (n = 73)

Kruskal Wallis p-value

R5 (IOS) (Kpa.s.L−1)

0.29 (0.06)¥

0.38 (0.10)

0.41 (0.14)φ

0.002

R5 z-score (IOS)

0.24 (0.73)

0.28 (0.90)

0.50 (1.11)

0.662

R5 (FOT) (Kpa.s.L−1)

0.25 (0.06)

0.33 (0.08)

0.37 (0.13)φ

0.0007

R5 z-score (FOT)

−0.13 (0.49)

−0.29 (0.78)

0.10 (1.22)

0.339

R20 (IOS) (Kpa.s.L−1)

0.27 (0.05)¥

0.34 (0.07)

0.32 (0.08)φ

0.018

R20 z-score (IOS)

−0.26 (0.72)

−0.14 (0.98)

−0.24 (0.98)

0.965

R19 (FOT) (Kpa.s.L−1)

0.24 (0.04)¥

0.30 (0.06)

0.30 (0.08)φ

0.013

R20 z-score (FOT)

−0.71 (0.71)

−0.60 (0.86)

−0.59 (1.00)

0.900

R5-R20 (IOS) (Kpa.s.L−1)

0.03 (0.03)

0.04 (0.06)

0.09 (0.08)φ,*

0.0005

R5-R19 FOT) (Kpa.s.L−1)

0.02 (0.04)

0.03 (0.06)

0.08 (0.08)φ,*

0.002

AX (IOS) (Kpa.L−1)

0.25 (0.14)

0.48 (0.55)

0.87 (0.85)φ

0.00

AX (FOT) (Kpa.L−1)

0.39 (0.23)

0.81 (0.82)

1.91 (1.93)φ

0.0007

X5 (IOS) (Kpa.s.L−1)

−0.09 (0.03)

−0.12 (0.04)

−0.15 (0.08)φ

0.007

X5 z-score (IOS)

0.25 (0.84)

0.39 (0.52)

−0.26 (1.64)

0.280

X5 (FOT) (Kpa.s.L−1)

−0.08 (0.03)

−0.12 (0.06)

−0.18 (0.12)φ

0.001

X5 z-score (FOT)

0.27 (0.77)

0.36 (0.88)

−0.63 (2.11)

0.196

X20 (IOS) (Kpa.s.L−1)

0.08 (0.03)

0.08 (0.06)

0.04 (0.05)φ,*

0.001

X19 (FOT) (Kpa.s.L−1)

0.03 (0.03)

0.02 (0.05)

−0.03 (0.07)φ,*

0.002

  1. Definition of abbreviations: R5: Resistance at 5 Hz; R20: Resistance at 20 Hz; R5-R20: Resistance at 5 Hz minus 20 Hz; R19: Resistance at 19 Hz; R5-R19: Resistance at 5 Hz minus 19 Hz; AX: Area of Reactance; X5: Reactance at 5 Hz; X20: Reactance at 20 Hz. Data presented as mean (SD). Kruskal Wallis test followed by Dunn’s multiple comparison post-test ¥p < 0.05 healthy vs. smokers. φp < 0.05 healthy vs. asthma; *p < 0.05 smokers vs. asthma.
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