Table 2.
Correlation of AiDA versus MRI densitometric variables as well as intercept versus age and FEV1
| Spearman’s ρ | p-value | |
|---|---|---|
| Airspace radius vs | ||
| PD15 | −0.584 | 0.0086 |
| RA7.5 | 0.603 | 0.0062 |
| MLD | −0.626 | 0.0041 |
| Age | 0.452 | 0.0522 |
| Intercept vs | ||
| FEV1 | 0.549 | 0.0149 |
| Age | 0.614 | 0.0051 |
Abbreviations: AiDA, Airspace Dimension Assessment with nanoparticles; MRI, magnetic resonance imaging; FEV1, forced expiratory volume in one second; PD15, 15th percentile proton density; RA7.5, relative area under 7.5% PD; MLD, mean lung density.