Correlation between computed tomography parameters and aerosol parameters for the whole patient group and for each subgroup
| All patients# | Usual COPD¶ | AAD+ | ||||
| PD15 | RA-910 | PD15 | RA-910 | PD15 | RA-910 | |
| EAD20 | -0.67** | 0.64** | -0.22 | 0.15 | -0.80** | 0.71** |
| ABD600 | -0.18 | 0.17 | 0.00 | -0.06 | -0.26 | 0.24 |
COPD: chronic obstructive pulmonary disease; AAD: α1-antitrypsin deficiency; PD15: 15th percentile density; RA-910: relative area below -910 Hounsfield units; EAD20: effective airway diameter for a relative volumetric lung depth of 20% of the intrathoracic lung volume at breath hold; ABD600: aerosol bolus dispersion for boluses inhaled into a volumetric lung depth of 600 cm3. #: n = 42; ¶: n = 20; +: n = 22. **: p<0.01.