Table 4.
Comparison of FEV1% with plethysmography and HRCT
| Variables | FEV1% | |
|---|---|---|
|
|
||
| r | P | |
| Plethysmography | −0.25 | 0.06 |
| Plethysmography-HRCT | 0.05 | 0.71 |
| HRCT total (L) | −0.22 | 0.10 |
| HRCT tissue (L) | 0.26 | 0.05 |
| HRCT air (L) | −0.29 | 0.03 |
| HRCT density (HU) | 0.48 | 0.00 |
| Emphysema less than −950 (%) | −0.43 | 0.00 |
| Emphysema less than −910 (%) | −0.49 | 0.00 |
Abbreviations: FEV1, forced expiratory volume in 1 second; RV, residual volume; FRC, functional residual capacity; FVC, forced vital capacity; HRCT, high-resolution computed tomography; TLC, total lung capacity.