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Table 4 Imaging characteristics of patients with COVID-19

From: Clinical and imaging findings of discharged patients with SARS-CoV-2 positive anal swab samples: a descriptive study

  Total (N = 31) Positive (n = 4) Negative (n = 27) P Value a
First CT, negative, (%) 3(9.7%) 1(25.0%) 2(7.4%) 0.349
First CT, positive, (%) 28(90.3%) 3(75.0%) 25(92.6%)  
Number of involved segments 9.3 ± 6.1 11 ± 8.9 9.1 ± 5.9 0.726
Involvement, (%)
 Single lobe 5(17.9%) 1(33.3%) 4(16.0%) 0.459
 Bilateral lobe 23(82.1%) 2(66.7%) 21(84.0%)  
Distribution, (%)
 Central 0 0 0
 Peripheral 15(53.6%) 1(33.3%) 14(56.0%) 0.583
 Central + Peripheral 13(46.4%) 2(66.7%) 11(44.0%)  
Degree, (%)
 Single lesion 4(14.3%) 1(33.3%) 3(12.0%) 0.217
 Multiple lesions 13(46.4%) 0(0.0%) 13(52.0%)  
 Diffuse lesions 11(39.3%) 2(66.7%) 9(36.0%)  
Imaging Features, (%)
 GGO 27(96.4%) 1(66.7%) 25(100.0%) 0.107
 Consolidation 19(67.9%) 3(100.0%) 16(64.0%) 0.530
 Linear opacities 19(67.9%) 2(66.7%) 17(68.0%) 1.000
 Mixed type 22(78.6%) 2(66.7%) 20(80.0%) 0.530
Interstitial change
 Interlobular septal thickening 3(10.7%) 1(3.3%) 2(8.0%) 0.298
 Intralobular interstitial thickening 21(75.0%) 2(66.7%) 19(76.0%) 1.000
Other signs, (%)
 Nodule 8(28.6%) 1(33.3%) 7(28.0%) 1.000
 Dilatation of vessels 26(92.9%) 2(66.7%) 24(96.0%) 0.206
 Bronchial wall thickening 13(46.4%) 2(66.7%) 11(44.0%) 0.583
 Air bronchogram 5(17.9%) 0(0.0%) 5(20.0%) 1.000
Crazy-paving pattern 3(10.7%) 0(0.0%) 3(12.0%) 1.000
 Halo sign 7(25.0%) 1(33.3%) 6(24.0%) 1.000
 Reversed halo sign 0(0.0%) 0(0.0%) 0(0.0%)
Pleural thickening 4(14.3%) 0(0.0%) 4(16.0%) 1.000
 Hydrothorax 0(0.0%) 0(0.0%) 0(0.0%)
Lymphadenectasis 0(0.0%) 0(0.0%) 0(0.0%)
CT scores
 On admission 7.7 ± 4.6 10.3 ± 8.3 7.4 ± 4.1 0.532
 On discharge 5.6 ± 3.5 8.0 ± 7.2 5.3 ± 2.9 0.433
 After discharge 4.4 ± 2.7 8.5 ± 2.1 3.8 ± 2.2 0.038
  1. aP values indicate differences between anal swab test positive and negative patients. P < .05 was considered statistically significant