TABLE 2.
Quantitative CT Parameters on Stage 1 and Stage 4 According to Different Clinical Severity Groups
| Mild (n = 26) | Moderate (n = 69) | Severe (n = 21) | |
|---|---|---|---|
| Lung volume (mL) | |||
| Stage 1 | 4548.86 ± 375 | 4641.1 ± 258.4 | 4848 ± 587.4 |
| Stage 4 | 4161.5 ± 498 | 4674.1 ± 295.8 | 2987.4 ± 445.6 |
| P | 1.000 | 1.000 | 0.008 |
| Opacity score | |||
| Stage 1 | 0.46 ± 0.65 | 2.7 ± 0.47 | 6.9 ± 1.37 |
| Stage 4 | 4.37 ± 1.1 | 3.1 ± 0.6 | 10.2 ± 0.83 |
| P | 0.011 | 1.000 | 0.194 |
| Volume of opacity (mL) | |||
| Stage 1 | 16.36 ± 98.8 | 61.1 ± 70.9 | 657 ± 204.4 |
| Stage 4 | 206.6 ± 175.4 | 171.2 ± 94.3 | 1166.7 ± 124 |
| P | 1.000 | 1.000 | 0.273 |
| Percentage of opacity (%) | |||
| Stage 1 | 0.47 ± 2.72 | 1.93 ± 1.9 | 12.74 ± 6 |
| Stage 4 | 5.7 ± 4.7 | 4.65 ± 2.6 | 36.2 ± 3.44 |
| P | 1.000 | 1.000 | 0.007 |
| Volume of high opacity (mL) | |||
| Stage 1 | 7.4 ± 23.7 | 14.9 ± 19 | 163.1 ± 37 |
| Stage 4 | 35.6 ± 47.6 | 31.15 ± 23.2 | 272.84 ± 30.3 |
| P | 1.000 | 1.000 | 0.374 |
| Percentage of high opacity (%) | |||
| Stage 1 | 0.2 ± 0.75 | 0.5 ± 0.6 | 3.6 ± 1.27 |
| Stage 4 | 1.22 ± 1.48 | 1 ± 0.73 | 8.4 ± 0.97 |
| P | 1.000 | 1.000 | 0.156 |
| Mean lung density (HU) | |||
| Stage 1 | −808 ± 20 | −795 ± 14 | −766 ± 44 |
| Stage 4 | −788 ± 34 | −775 ± 19 | −632 ± 26 |
| P | 1.000 | 1.000 | 0.051 |
Data are expressed as mean ± SD.