TABLE 4.
The correlation between quantitative high-resolution computed tomography (HRCT) parameters at expiration and pulmonary function parameters.
| FEV1 |
FVC |
FEV1/FVC |
FEV1%prep |
||||||
| r | p | r | p | r | p | r | p | ||
| Left lung | LAA−856exp | –0.13 | 0.14 | –0.09 | 0.34 | –0.32** | 0.00 | –0.24** | 0.01 |
| LVexp | –0.06 | 0.52 | –0.01 | 0.92 | –0.29** | 0.01 | –0.25** | 0.01 | |
| LAA−856exp% | –0.19* | 0.04 | –0.15 | 0.11 | –0.33** | 0.00 | –0.24** | 0.01 | |
| MLD exp | –0.06 | 0.50 | –0.14 | 0.13 | 0.31** | 0.00 | 0.03 | 0.73 | |
| Right lung | LAA−856exp | –0.16 | 0.08 | –0.13 | 0.16 | –0.23* | 0.01 | –0.26** | 0.00 |
| LVexp | –0.08 | 0.38 | –0.06 | 0.50 | –0.17* | 0.03 | –0.24* | 0.01 | |
| LAA−856exp% | –0.20* | 0.03 | –0.17 | 0.08 | –0.23* | 0.01 | –0.25** | 0.01 | |
| MLD exp | –0.06 | 0.49 | –0.13 | 0.15 | 0.25** | 0.00 | 0.04 | 0.69 | |
| Entire lung | LAA−856exp | –0.14 | 0.14 | –0.10 | 0.29 | –0.28** | 0.00 | –0.25** | 0.01 |
| LVexp | –0.09 | 0.34 | –0.05 | 0.59 | –0.25** | 0.01 | –0.27** | 0.00 | |
| LAA−856exp% | –0.20* | 0.03 | –0.16 | 0.08 | –0.28** | 0.00 | –0.24** | 0.01 | |
| MLD exp | –0.08 | 0.41 | –0.15 | 0.10 | 0.29** | 0.00 | 0.02 | 0.80 | |
**p < 0.01, *p < 0.05. FEV1: forced expiratory volume in first second, FVC: forced vital capacity, FEV1/FVC: forced expiratory volume in first second/forced vital capacity, FEV1%prep: forced expiratory volume in first second as a percentage of the expected value, LAA–856exp: low attenuation areas less than-856HU on expiratory CT scan, LVexp: lung volume on expiratory CT scan, LAA–856exp%: low attenuation areas less than-856HU to lung volume on expiratory CT scan, MLDexp: mean lung density on expiratory CT scan.