Table 2.
Pearson r correlations between ESI scores and functional and radiological data
| ESI | ||
|---|---|---|
| r | p | |
| %LAA-950insp | 0.81 | <.01 |
| %LAA-856exp | 0.74 | <.01 |
| %fLDA | 0.46 | <.01 |
| %pLDA | 0.80 | <.01 |
| AWTPi10 | 0.13 | .09 |
| FEV1 (%pred.) | −0.74 | <.01 |
| FVC (%pred) | − 0.30 | <.01 |
| FEV1/FVC (%) | −0.87 | <.01 |
| FRC (% pred) | 0.69 | <.01 |
| RV (% pred) | 0.65 | <.01 |
| TLC (% pred) | 0.37 | <.01 |
| DLco (% pred) | −0.56 | <.01 |
Legend: AWTPi10 airway wall thickness at an internal perimeter of 10 mm, DLco diffusing lung capacity for carbon monoxide, FEV1 forced expiratory volume in 1 s, %fLDA percentage of functional low density area, FRC forced respiratory capacity, FVC forced vital capacity, %LAA-950insp percentage of lung attenuation area with values <− 950 Hounsfield Units at inspiratory CT scan, %LAA-856exp percentage of lung attenuation area with values <− 856 Hounsfield Units at expiratory CT scan, %pLDA percentage of persistent low density area, %pred percentage of predicted, RV residual volume, TLC total lung capacity