Table 3.
Area under the curve (AUC), sensitivity (Se), specificity (Sp) and cut-off point of the Forced Oscillation parameters.
| AUC | Se (%) | Sp (%) | Cut-off | |
| Zm (cmH2O/L/s) | 0.974(0.86-1.00) | 94.7(73.9-99.1) | 95.0(75.1-99.2) | 6.2 |
| Zi (cmH2O/L/s) | 0.963(0.85-0.99) | 94.7(73.9-99.1) | 90.0(68.3-98.5) | 5.6 |
| Ze (cmH2O/L/s) | 0.976(0.87-1.00) | 100.0(82.2-100.0) | 90.0(68.3-98.5) | 5.7 |
| Zbi (cmH2O/L/s) | 0.958(0.84-0.99) | 94.7(73.9-99.1) | 90.0(68.3-98.5) | 5.4 |
| Zbe (cmH2O/L/s) | 0.971(0.86-1.00) | 94.7(73.9-99.1) | 95(75.1-99.2) | 6.2 |
| Zpp (cmH2O/L/s) | 0.903(0.76-0.97) | 89,5(66.8-98.4) | 85(62.1-96.6) | 1.3 |
| ΔZrs (cmH2O/L/s) | 0.766(0.60-0.89) | 78.9(45.7-88.0) | 78.9(54.4-93.8) | 0.37 |
Values are presented as mean and confidence interval (95%); Zm – mean impedance of the respiratory system; Zi – inspiratory impedance; Ze – expiratory impedance; Zbi – impedance at the beginning of inspiration; Zbe – impedance at the beginning of expiration. Zpp – peak-to-peak variation of the impedance; ΔZrs – variation of the mean impedance.