Table 3.
Pearson Correlation Analysis Between Chest Expansion, Ultrasound and Spirometry Data
| Parameters | Chest Expansion | |
|---|---|---|
| r | p-values | |
| B Lines | 0.32a | 0.02* |
| RDE (mm) | 0.016 | 0.914 |
| LDE (mm) | 0.340 | 0.813 |
| Right tdi-insp (mm) | 0.370 | 0.801 |
| Left tdi-insp (mm) | −0.02 | 0.989 |
| Right tdi-exp (mm) | 0.530 | 0.715 |
| Left tdi-exp (mm) | −0.016 | 0.910 |
| FVC | 0.377 | 0.16 |
| Δ FVC | 0.015 | 0.912 |
Notes: Δ FVC: [(FVC- FVC supine)/FVC] *100. Pearson correlation (r): a: positive moderate correlation, b: positive weak correlation; * p <0.05 (student test).
Abbreviations: FVC, Forced Vital Capacity; LDE, left diaphragmatic excursion; RDE, Right diaphragmatic excursion; Tdi-insp, Diaphragmatic thickness at end inspiration; Tdi-exp, Diaphragmatic thickness at end-expiration.