Table 1 Summary of demographic, clinical variables and CT findings
| Â | Â | Parenchymal extension | Â | |||
|---|---|---|---|---|---|---|
|  |  | < 20% | 20–39% | 40–59% | ≥60% | Fisher’s exact test p-value |
Demographic and clinical variables | ||||||
 Age | ≥60 y (n = 432) | 133 (39.2) | 175 (51.5) | 82 (68.3) | 42 (62.7) | < 0.0001 |
< 60 y (n = 434) | 206 (60.8) | 165 (48.5) | 38 (31.7) | 25 (37.3) | ||
 Sex | Male (n = 527) | 185 (54.6) | 205 (60.3) | 88 (73.3) | 49 (73.1) | 0.0001 |
Female (n = 339) | 154 (45.4) | 135 (39.7) | 32 (26.7) | 18 (26.9) | ||
 Charlson comorbidity index | ≥1 (n = 151) | 50 (15.7) | 48 (15.0) | 28 (24.8) | 25 (37.9) | < 0.0001 |
0 (n = 667) | 268 (84.3) | 273 (85.0) | 85 (75.2) | 41 (62.1) | ||
 Hospitalization | N (n = 503) | 255 (75.2) | 197 (57.9) | 37 (30.8) | 14 (20.9) | < 0.0001 |
Y (n = 363) | 84 (24.8) | 143 (42.1) | 83 (69.2) | 53 (79.1) | ||
 Death within 30 days | N (n = 773) | 322 (95.0) | 317 (93.2) | 96 (80.0) | 38 (56.7) | < 0.0001 |
Y (n = 93) | 17 (5.0) | 23 (6.8) | 24 (20.0) | 29 (43.3) | ||
CT findings | ||||||
 Ground-glass opacities | N (n = 29) | 26 (7.7) | 2 (0.6) | 1 (0.8) | 0 (0.0) | 0.0051 |
Y (n = 837) | 313 (92.3) | 338 (99.4) | 119 (99.2) | 67 (100) | ||
 Consolidation | N (n = 319) | 152 (44.8) | 118 (34.7) | 31 (25.8) | 18 (26.9) | 0.0002 |
Y (n = 547) | 187 (55.2) | 222 (65.3) | 89 (74.2) | 49 (73.1) | ||
 Crazy-paving pattern | N (n = 126) | 66 (60.6) | 38 (33.3) | 15 (25.0) | 7 (20.6) | 0.0042 |
Y (n = 191) | 43 (39.4) | 76 (66.7) | 45 (75.0) | 27 (79.4) | ||
 Enlarged lymph nodes | N (n = 279) | 104 (95.4) | 102 (89.5) | 49 (81.7) | 24 (70.6) | 0.0005 |
Y (n = 38) | 5 (4.6) | 12 (10.5) | 11 (18.3) | 10 (29.4) | ||
 Pleural effusion | N (n = 290) | 106 (97.2) | 104 (91.2) | 52 (86.7) | 28 (82.4) | 0.0101 |
Y (n = 27) | 3 (2.8) | 10 (8.8) | 8 (13.3) | 6 (17.6) | ||