From: Machine learning-based CT radiomics model distinguishes COVID-19 from non-COVID-19 pneumonia
Characteristic | Training cohort | Testing cohort | ||||
---|---|---|---|---|---|---|
COVID-19 | Other types of-pneumonia | P value | COVID-19 | Other types of pneumonia | p value | |
Patients | 52 | 60 | – | 11 | 11 | – |
Exams | 206 | 69 | – | 38 | 13 | – |
Age | 52.7 ± 12.6 | 41.5 ± 15.5 |  < 0.001b | 47.5 ± 16.1 | 46.9 ± 18.4 | 0.942b |
Gender, Male (%) | 31 (60%) | 33 (55%) | 0.623a | 5 (45%) | 8 (73%) | 0.387a |
Exposure history | Â | Â | 0.006a | Â | Â | 0.375a |
 Close contact with infected patients | 52 (100%) | 52(87%) |  | 8 (73%) | 6 (55%) |  |
 Unknown cause | 0 (0%)3 | 8(13%) |  | 3 (27%) | 5 (45%) |  |
Comorbidities, No. (%) | ||||||
 Cardiovasular disease | 1 (2%) | 1(2%) | 1.000a | 2 (18%) | 1 (9%) | 0.534a |
 Diabetes | 4 (8%) | 0(0%) | 0.029a | 0 (0%) | 0 (0%) | – |
 Hypertension, No. (%) | 9 (17%) | 4(7%) | 0.080a | 0 (0%) | 1 (9%) | 0.317a |
 COPD | 3 (6%) | 2(3%) | 0.535a | 0 (0%) | 0 (0%) | – |
 Chronic liver disease | 2 (4%) | 1(2%) | 0.478a | 0 (0%) | 0 (0%) | – |
 Chronic kidney disease | 0 (0%) | 0(0%) | – | 0 (0%) | 1 (9%) | 0.317a |
 Cancer, No. (%) | 0 (0%) | 1(2%) | 0.352a | 1 (9%) | 2 (18%) | 0.544a |
Symptoms | ||||||
 Fever, No. (%) | 46 (88%) | 46 (77%) | 0.104a | 6 (55%) | 7 (64%) | 0.672a |
 Cough, No. (%) | 43 (83%) | 26 (43%) |  < 0.001a | 6 (55%) | 3 (27%) | 0.387a |
 Myalgia, No. (%) | 10 (19%) | 2 (3%) | 0.007a | 2 (18%) | 0 (0%) | 0.476a |
 Fatigue, No. (%) | 18 (35%) | 2 (3%) |  < 0.001a | 0 (0%) | 0 (0%) | – |
 Headache, No. (%) | 9 (17%) | 1 (2%) | 0.01a | 2 (18%) | 0 (0%) | 0.476a |
 Nausea, No. (%) | 5 (10%) | 0 (0%) | 0.046a | 2 (18%) | 0 (0%) | 0.476a |
 Diarrhea, No. (%) | 7 (13%) | 1 (2%) | 0.04a | 1 (9%) | 0 (0%) | 1.000a |
 Bellyache, No. (%) | 0 (0%) | 0 (0%) | – | 1 (9%) | 0 (0%) | 1.000a |
 Dyspnea, No. (%) | 1 (2%) | 0 (0%) | 0.464a | 0 (0%) | 0 (0%) | – |
 Other symptoms, No. (%) | 19 (37%) | 14 (23%) | 0.126a | 4 (36%) | 2 (18%) | 0.635a |
Laboratory results | ||||||
 White blood cell count | 4.8 ± 2.0 | 8.2 ± 3.5 |  < 0.001b | 5.1 ± 1.8 | 9.4 ± 3.4 | 0.001b |
 Number of neutrophils, × 109/L | 3.2 ± 1.9 | 5.8 ± 3.2 |  < 0.001b | 3.2 ± 1.5 | 6.8 ± 3.3 | 0.003b |
 Lymphocyte count, × 109/L | 1.2 ± 0.8 | 1.6 ± 1.1 | 0.032b | 1.4 ± 0.5 | 1.7 ± 1.0 | 0.473b |
 Hemoglobin | 134.1 ± 25.2 | 138.7 ± 17.6 | 0.267b | 128.3 ± 19.8 | 139.7 ± 21.3 | 0.206b |
 Platelet count, × 109/L | 175.8 ± 60.3 | 225.6 ± 62.0 |  < 0.001b | 215.6 ± 70.7 | 230.1 ± 89.0 | 0.678b |