Skip to main content

Table 2 Radiological characteristics of patients with COVID-19 and non-COVID-19 pneumonia in the training, validation, and testing cohorts

From: CT radiomics facilitates more accurate diagnosis of COVID-19 pneumonia: compared with CO-RADS

Characteristics Training cohort (n = 379) P value Validation cohort (n = 131) P value Testing cohort (n = 40) P value
Non-COVID-19 group (n = 313) COVID-19 group (n = 66) Non-COVID-19 group (n = 102) COVID-19 group (n = 29) Non-COVID-19 group (n = 20) COVID-19 group (n = 20)
Number (%)    < 0.001    0.001    0.025
 Single 179 (57.2) 5 (7.6)   64 (62.7) 8 (27.6)   12 (60.0) 5 (25.0)  
 Multiple 134 (42.8) 61 (92.4)   38 (37.3) 21 (72.4)   8 (40.0) 15 (75.0)  
Location (%)    0.131     > 0.999    0.339
 Unilateral lung 33 (10.5) 3 (4.5)   6 (5.9) 2 (6.9)   4 (20.0) 1 (5.0)  
 Bilateral lungs 280 (89.5) 63 (95.5)   96 (94.1) 27 (93.1)   16 (80.0) 19 (95.0)  
Distribution (%)     < 0.001     < 0.001    0.006
 Peripheral 48 (15.3) 46 (69.7)   19 (18.6) 15 (51.7)   6 (30.0) 16 (80.0)  
 Central 24 (7.7) 1 (1.5)   3 (2.9) 1 (3.4)   1 (5.0) 0 (0.0)  
 Peripheral and Central 241 (77.0) 19 (28.8)   80 (78.4) 13 (44.8)   13 (65.0) 4 (20.0)  
Density (%)    0.544    0.469    0.067
 Pure GGO 76 (24.3) 13 (19.7)   20 (19.6) 8 (27.6)   11 (55.0) 4 (20.0)  
Pure consolidation 75 (24.0) 14 (21.2)   23 (22.5) 4 (13.8)   3 (15.0) 4 (20.0)  
 GGO with consolidation 162 (51.8) 39 (59.1)   59 (57.8) 17 (58.6)   6 (30.0) 12 (60.0)  
Accompanying features (%)
 Reticulation 22 (7.0) 27 (40.9)  < 0.001 13 (12.7) 8 (27.6) 0.102 9 (45.0) 7 (35.0) 0.519
 Air bronchogram 168 (53.7) 34 (51.5) 0.749 52 (51.0) 15 (51.7) 0.944 6 (30.0) 9 (45.0) 0.327
Other findings (%)
 Pleural effusion 31 (9.9) 10 (15.2) 0.212 12 (11.8) 2 (6.9) 0.683 1 (5.0) 0 (0.0)  > 0.999
 Lymphadenopathy 46 (14.7) 1 (1.5) 0.003 11 (10.8) 2 (6.9) 0.790 2 (10.0) 0 (0.0) 0.468
CT score, median (IQR) 4.0 (3.0) 5.0 (3.0)  < 0.001 3.0 (3.0) 5.0 (4.5) 0.042 2.5 (3.5) 4.5 (4.8) 0.157
  1. IQR inter-quartile range