Table 2.
Results for Quantitative Imaging Feature
| Features | Emphysema | COPD | p-value* | |
|---|---|---|---|---|
| EI% | Right upper lobe | 18.93 (7.91) | 26.40 (15.62) | <0.001 |
| Right middle lobe | 21.11 (7.48) | 24.81 (14.12) | 0.057 | |
| Right lower lobe | 16.01 (7.69) | 20.15 (13.12) | 0.098 | |
| Right lung | 18.17 (7.47) | 23.91 (13.38) | <0.001 | |
| Left upper lobe | 20.35 (7.86) | 25.60 (14.29) | <0.001 | |
| Left lower lobe | 15.79 (7.43) | 21.31 (13.22) | <0.001 | |
| Left lung | 18.32 (7.47) | 23.82 (13.15) | <0.001 | |
| Overall lung | 18.25 (7.44) | 23.88 (13.10) | <0.001 | |
| Perc15 | −945.38 (17.57) | −955.68 (22.48) | <0.001 | |
| MLD | Overall lung, HU | −814.45 (41.02) | −840.25 (38.21) | <0.001 |
| Right upper lobe, HU | −815.33 (40.58) | −847.82 (38.18) | <0.001 | |
| Right middle lobe, HU | −834.07 (34.27) | −849.06 (37.73) | <0.001 | |
| Right lower lobe, HU | −803.23 (57.57) | −823.97 (53.59) | <0.001 | |
| Left upper lobe, HU | −826.01 (33.12) | −849.82 (34.14) | <0.001 | |
| Left lower lobe, HU | −796.84 (54.58) | −824.10 (57.21) | <0.001 | |
| Airway | Pi10, mm | 3.38 (0.69) | 4.25 (1.81) | <0.001 |
| WA% | 0.59 (0.08) | 0.53 (0.06) | <0.001 | |
| WT, mm | 0.98 (0.26) | 1.38 (0.69) | <0.001 | |
| Vessel | Surface area, mm2 | 4392.26 (1241.34) | 4961.37 (1648.46) | 0.058 |
| TBV, mm3 | 241.51 (74.13) | 287.16 (99.55) | <0.001 | |
| BV5, mm3 | 141.03 (39.31) | 154.59 (54.86) | 0.972 | |
| BV5/TBV | 0.59 (0.05) | 0.55 (0.09) | <0.001 | |
Note: *Mann–Whitney U-test.
Abbreviations: EI, emphysema; MLD, Mean lung density.