Table 3 Imaging at arrival in the ED of RT-PCR negative patients. Data are described in the whole group and in the two subgroups COVID-19 and NOT-COVID defined at the end of the hospital stay by clinical judgment or further testing. Data are expressed as absolute frequencies and percentages (in brackets) for categorical variables and as medians and Interquartile Ranges [IQR]
From: The broad spectrum of COVID-like patients initially negative at RT-PCR testing: a cohort study
|  | Overall N (%) | COVID-19 N (%) | COVID-free/other than COVID N (%) | p |
|---|---|---|---|---|
Chest X ray (n = 107) |  |  |  | 0.525° |
 Pneumonia consolidation | 24 (22.4) | 15 (24.6) | 9 (19.6) |  |
 Interstitial syndrome | 29 (27.1) | 19 (31.1) | 10 (21.7) |  |
 Aspecific findings | 30 (28.0) | 15 (24.6) | 15 (32.6) |  |
 Normal CXR | 24 (22.4) | 12 (19.7) | 12 (26.1) |  |
Lung ultrasound (n = 88) |  |  |  | 0.019° |
 Consolidation | 18 (20.5) | 13 (23.6) | 5 (15.2) |  |
 Monolateral mild interstitial syndrome | 11 (12.5) | 5 (9.1) | 6 (18.2) |  |
 Bilateral severe interstitial syndrome | 33 (37.5) | 26 (47.3) | 7 (21.2) |  |
 Pleural effusion | 13 (14.8) | 7 (12.7) | 6 (18.2) |  |
 Normal Lung Ultrasound | 13 (14.8) | 4 (7.3) | 9 (27.3) |  |
CT scan (n = 85) |  |  |  | < 0.001§ |
 Typical pattern | 37 (43.5) | 29 (58.0) | 8 (22.9) |  |
 Atypical pattern | 19 (22.4) | 5 (10.0) | 14 (40.0) |  |
 Undetermined | 27 (31.8) | 16 (32.0) | 11 (31.4) |  |
 Normal CT scan | 2 (2.4) | 0 (0.0) | 2 (5.7) |  |
Irregular pleural line (n = 89) |  |  |  | 0.043§ |
 No | 82 (92.1) | 49 (87.5) | 33 (100.0) |  |
 Yes | 7 (7.9) | 7 (12.5) | 0 (0.0) |  |