Table 2.
Mean (%) ± Standard Deviation (SD) and median values (%) of HRCT parameters obtained considering the three different HU thresholds. HAA, defined as the areas with attenuation values greater than −200 HU, is not shown in the first column.
| −200 HU | 0 HU | 200 HU | ||||
|---|---|---|---|---|---|---|
| Parameters | Mean ± SD | Median | Mean ± SD | Median | Mean ± SD | Median |
| NL% | 65.12 ± 7.41 | 65.24 | 61.51 ± 6.68 | 62.96 | 58.99 ± 10.64 | 61.29 |
| PFF% | 23.98 ± 8.25 | 22.71 | 26.84 ± 9.32 | 24.80 | 31.05 ± 11.94 | 26.40 |
| HAA% | n.a. | n.a. | 14.84 ± 24.97 | 3.95 | 9.42 ± 10.99 | 4.88 |
| LAA% | 8.51 ± 6.42 | 5.95 | 9.15 ± 5.50 | 6.95 | 7.19 ± 4.59 | 5.57 |
| HAA_A% | 14.09 ± 4.87 | 13.61 | 14.16 ± 4.74 | 13.81 | 12.70 ± 4.40 | 12.23 |
| Kurtosis | 1.49 ± 1.08 | 1.39 | 1.65 ± 3.02 | 1.69 | 1.91 ± 3.33 | 1.95 |
n.a.= not applicable