Table 1.
Patients’ demographic and clinical characteristics
| Time from symptom onset to initial CT | ||||
|---|---|---|---|---|
| Patients n = 52 |
0–3 days n = 21 |
4–6 days n = 18 |
7–14 days n = 13 |
|
| Gender (male) | 13 (60) | 8 (44) | 9 (69) | |
| Age (years) | 45.3 ± 16.0 | 44.0 ± 17.8 | 47.0 ± 14.2 | 45.0 ± 16.4 |
| Exposure | ||||
| Residency in Wuhan | 41 (78) | 14 (66) | 14 (77) | 13 (100) |
| Clustered cases | 7 (13) | 5 (24) | 2 (11) | 0 (0) |
| Close contact with COVID-19 patients | 3 (6) | 3 (14) | 0 (0) | 0 (0) |
| Unknown | 1 (2) | 0 (0) | 1 (5) | 0 (0) |
| Symptom | ||||
| No fever | 9 (17) | 5 (24) | 4 (22) | 0 (0) |
| Dyspnea | 4 (8) | 0 (0) | 3 (17) | 1 (8) |
| Diarrhea | 2 (4) | 0 (0) | 2 (11) | 0 (0) |
| Negative CT finding | 2 (4) | 2 (10) | 0 (0) | 0 (0) |
| QCT parameters | ||||
| LV | 4206 ± 1060 | 4143 ± 1098 | 4004 ± 848 | 4589 ± 1233 |
| TLV | 204 ± 262 | 154 ± 177 | 270 ± 378* | 193 ± 169 |
| Lesion% | 5 ± 3 | 4 ± 4 | 7 ± 9* | 5 ± 4 |
| MD | − 446 ± 100 | − 462 ± 99 | − 439 ± 116 | − 430 ± 80 |
| GGO% | 20 ± 15 | 21 ± 16 | 20 ± 14 | 18 ± 15 |
LV lung volume, TLV total lesion volume, Lesion% the percentage of lung involvement, MD mean density, GGO% proportion of pixels related to ground-glass opacity (GGO)
*p < 0.05, compared with corresponding indexes during 0–3 days