Table 3. Oscillometric parameters of the total sample, during the forced expiratory technique intervention, and comparison of the results during the protocol.
| Oscillometric parameters | Pre-FET M±SD (95%CI) |
Post-huff M±DS (95%CI) |
Post-FET M±SD (95%CI) |
p-value |
|---|---|---|---|---|
| Z5 (kPa/L/s) | 0.68±0.26 (0.60–0.76) |
0.80±0.32 (0.70–0.90) |
0.79±0.29 (0.70–0.88) |
<0.001*,†,‡ |
| Z5% | 164.79±66.83 (144.22–185.35) |
197.04±91.44 (168.90–225.18) |
192.73±81.45 (167.67–217.80) |
<0.001*,†,‡ |
| R5 (kPa/L/s) | 0.63±0.23 (0.55–0.70) |
0.74±0.28 (0.65–0.82) |
0.73±0.26 (0.65–0.81) |
<0.001*,†,‡ |
| R5% | 104.11±27.93 (95.51–112.71) |
124.45±37.31 (112.97–135.93) |
122.76±37.61 (111.18–134.33) |
<0.001*,†,‡ |
| R20 (kPa/L/s) | 0.47±0.11 (0.44–0.50) |
0.53±0.13 (0.49–0.57) |
0.52±0.13 (0.48–0.57) |
<0.001*,†,‡ |
| R20% | 95.72±16.74 (90.57–100.87) |
109.41±23.95 (102.04–116.78) |
107.09±24.25 (99.62–114.55) |
<0.001*,†,‡ |
| X5 (kPa/L/s) | -0.26±0.14 (-0.31–(-0.22)) |
-0.30±0.18 (-0.35–(-0.24)) |
-0.29±0.15 (-0.33–(-0.24)) |
0.002*,†,‡ |
| X5% | 191.71±85.27 (165.47–217.95) |
214.74±114.22 (179.59–249.89) |
207.61±97.24 (177.68–237.53) |
0.005*,†,‡ |
M: mean; SD: standard deviation; n: number; 95%CI: 95% confidence interval for the mean; FET: forced expiratory technique; R5: resistance at 5 Hz; R20: resistance at 20 Hz; X5: reactance at 5 Hz; Z5: impedance at 5 Hz (all expressed as kPa/L/s); p-value: intervention effect by the repeated measures ANOVA test with significance at p≤0.05.
*statistically significant differences in the comparison between the intervention effect pre-FET versus post-huff by the repeated measures ANOVA test (Bonferroni post-hoc) with significance at p≤0.05;
†statistically significant differences in the comparison between the intervention effect post-huff versus post-FET by the repeated measures ANOVA test (Bonferroni post-hoc) with significance at p≤0.05;
‡statistically significant differences in the comparison between the intervention effect pre-FET versus post-FET by the repeated measures ANOVA test (Bonferroni post-hoc) with significance at p≤0.05.