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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%).