Table 4.
Oscillometry measurements at 40 days post-COVID-19.
| Variables (Mean ± SD) | Mild (n = 22) | Moderate (n = 22) | Severe (n = 22) | p-Value |
|---|---|---|---|---|
| RF | 14.3 ± 4.5 | 15.6 ± 2.9 | 17.4 ± 4.4 | 0.042 * |
| R4 | 4.6 ± 2.1 | 4.6 ± 1.4 | 3.5 ± 1.1 | 0.035 |
| R6 | 3.5 ± 1.6 | 3.8 ± 0.8 | 4.0 ± 1.0 | 0.375 |
| X4 | −2.2 ± 1.4 | −1.8 ± 1.1 | −2.8 ± 1.4 | 0.045 * |
| X6 | −1.5 ± 0.7 | −1.3 ± 0.5 | −1.2 ± 0.5 | 0.219 |
| R20 | 3.6 ± 1.5 | 3.0 ± 0.9 | 3.4 ± 1.5 | 0.320 |
| Result (n, %) | ||||
| Ventilatory dysfunction | 7 (31.8%) | 10 (45.5%) | 16 (72.7%) | 0.021 |
| Post-COVID-19 fibrosis | 10 (45.5%) | 12 (54.5%) | 15 (68.2%) | 0.310 |
| Normal | 9 (40.9%) | 4 (18.2%) | 2 (9.1%) | 0.034 |
*—Significant on post hoc analysis; SD—Standard Deviation; RF—Resonant Frequency; R4—Resistance at 4 Hz; R6—Resistance at 6 Hz; X4—Reactance at 4 Hz; X6—Reactance at 6 Hz; R20—Resistance at 20 Hz.