Table 2.
Radiographic alterations
| All patients (n = 240) | Group A (n = 49) | Group B (n = 75) | Group C (n = 85) | Group D (n = 31) | |
| Negative chest radiography, n (%) | 60 (25) | 18 (36.7) | 21 (28) | 16 (18.8) | 5 (16.1) |
| All patients (n = 180) | Group A (n = 31) | Group B (n = 54) | Group C (n = 69) | Group D (n = 26) | |
| Positive chest radiographs, n (%) | |||||
| Bilateral alterations | 132 (73.3) | 25 (80.6) | 36 (66.6) | 51 (73.9) | 20 (76.9) |
| Pleural effusion | 12 (6.6) | 2 (6.4) | 4 (7.4) | 4 (5.8) | 2 (7.7) |
| Reticular alteration (total) | 113 (62.7) | 22 (70.9) | 39 (72.2) | 40 (57.9) | 12 (46.1) |
| Ground-glass opacity (total) | 124 (68.8) | 21 (67.7) | 34 (62.9) | 49 (71) | 20 (76.9) |
| Consolidation (total) | 71 (39.4) | 11 (35.5) | 17 (31.4) | 33 (47.8) | 10 (38.5) |
| Reticular alteration alone | 27 (15) | 5 (16.1) | 13 (24.1) | 7 (10.1) | 2 (7.7) |
| Ground-glass opacity alone | 38 (21.1) | 5 (16.1) | 11 (20.3) | 14 (20.3) | 8 (30.8) |
| Consolidation alone | 8 (4.4) | 1 (3.2) | 0 | 5 (7.2) | 2 (7.6) |