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Table 3 Sensitivity (Se), specificity (Sp), area under the curve (AUC) and cut-off point of the Forced Oscillation and Spirometric parameters.

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

  Se (%) Sp (%) AUC Cut-off
Forced Oscillation     
R0
(cmH2O/L/s)
71.4
(51.3-86.7)
75.0
(55.1-89.3)
0.75
(0.61-0.85)
2.70
S
(cmH2O/L/s2)
64.3
(44.1-81.3)
60.7
(40.6-78.5)
0.62
(0.48-0.75)
2.66
Rm
(cmH2O/L/s)
67.9
(47.7-84.1)
67.9
(47.7-84.1)
0.72
(0.58-0.83)
2.57
fr
(Hz)
71.4
(51.3-86.7)
64.3
(44.1-81.3)
0.74
(0.61-0.85)
11.17
Xm
(cmH2O/L/s)
78.6
(59.0-91.7)
67.9
(47.7-84.1)
0.74
(0.61-0.85)
0.42
Cdyn, rs
(L/cmH2O)
78.6
(59.0-91.7)
67.9
(47.7-84.1)
0.75
(0.61-0.85)
0.018
Z4Hz
(cmH2O/L/s)
75.0
(55.1-89.3)
75.0
(55.1-89.3)
0.79
(0.66-0.88)
3.58
Spirometry     
FEV1
(L)
57.1
(37.2-75.5)
60.7
(40.6-78.5)
0.58
(0.44-0.71)
3.60
FEV1
(%)
50.0
(30.7-69.3)
42.9
(24.5-62.8)
0.50
(0.36-0.64)
105.00
FEV1/FVC
(%)
60.7
(40.6-78.5)
60.7
(40.6-78.5)
0.59
(0.45-0.72)
85.00
FEF25-75%
(L)
53.6
(33.9-72.5)
46.4
(27.5-66.1)
0.53
(0.40-0.67)
4.13
FEF25-75%
(%)
50.0
(30.7-69.3)
67.9
(47.7-84.1)
0.54
(0.40-0.68)
95.00
FEF/FVC
(%)
60.7
(40.6-78.5)
60.7
(40.6-78.5)
0.55
(0.41-0.69)
94.50
  1. Values are presented as mean and confidence interval (95%).