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Table 2 Forced oscillation parameters of the studied groups.

From: Evaluating the forced oscillation technique in the detection of early smoking-induced respiratory changes

 

Control

(n = 28)

Smokers

(n = 28)

p-value

R0 (cmH2O/L/s)

2.41 ± 0.80

2.10 - 2.72**

3.01 ± 0.75

2.72 - 3.30*

0.001

Rm (cmH2O/L/s)

2.47 ± 0.71

2.19 - 2.74**

2.96 ± 0.62

2.73 - 3.20*

ns

S (cmH2O/L/s2)

5.84 ± 14.44

0.24 - 11.44*

-4.67 ± 25.63

-14.61 - 5.27*

ns

fr (Hz)

10.88 ± 1.68

10.23 - 11.53**

14.18 ± 4.14

12.57 - 15.78**

0.002

Xm (cmH2O/L/s)

0.55 ± 0.27

0.44 - 0.65*

0.23 ± 0.40

0.07 - 0.38*

0.0009

Cdyn, rs (L/cmH2O)

0.021 ± 0.004

0.019 - 0.022*

0.017 ± 0.005

0.015 - 0.018*

0.001

Z4Hz (cmH2O/L/s)

3.14 ± 0.9

2.84 - 3.45**

3.96 ± 0.71

3.67 - 4.24*

0.0002

  1. * Normal distribution; ** Non-normal distribution.
  2. Values are presented as mean ± SD and confidence interval (95%).