Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Prognostic Implication of Volumetric Quantitative CT Analysis in Patients with COVID-19: A Multicenter Study in Daegu, Korea

  • Byunggeon Park (Department of Radiology School of Medicine, Kyungpook National University) ;
  • Jongmin Park (Department of Radiology School of Medicine, Kyungpook National University) ;
  • Jae-Kwang Lim (Department of Radiology School of Medicine, Kyungpook National University) ;
  • Kyung Min Shin (Department of Radiology School of Medicine, Kyungpook National University) ;
  • Jaehee Lee (Department of Internal Medicine School of Medicine, Kyungpook National University) ;
  • Hyewon Seo (Department of Internal Medicine School of Medicine, Kyungpook National University) ;
  • Yong Hoon Lee (Department of Internal Medicine School of Medicine, Kyungpook National University) ;
  • Jun Heo (Department of Internal Medicine School of Medicine, Kyungpook National University) ;
  • Won Kee, Lee (Medical Research Collaboration Center in Kyungpook National University Hospital, School of Medicine, Kyungpook National University) ;
  • Jin Young Kim (Department of Radiology, Keimyung University Dongsan Hospital) ;
  • Ki Beom Kim (Department of Radiology, Daegu Fatima Hospital) ;
  • Sungjun Moon (Department of Radiology, College of Medicine, Yeungnam University) ;
  • Sooyoung, Choi (Department of Radiology, Yeungnam University Medical Center)
  • Received : 2020.05.02
  • Accepted : 2020.06.13
  • Published : 2020.11.01
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Abstract

Objective: Lung segmentation using volumetric quantitative computed tomography (CT) analysis may help predict outcomes of patients with coronavirus disease (COVID-19). The aim of this study was to investigate the relationship between CT volumetric quantitative analysis and prognosis in patients with COVID-19. Materials and Methods: CT images from patients diagnosed with COVID-19 from February 18 to April 15, 2020 were retrospectively analyzed. CT with a negative finding, failure of quantitative analysis, or poor image quality was excluded. CT volumetric quantitative analysis was performed by automated volumetric methods. Patients were stratified into two risk groups according to CURB-65: mild (score of 0-1) and severe (2-5) pneumonia. Outcomes were evaluated according to the critical event-free survival (CEFS). The critical events were defined as mechanical ventilator care, ICU admission, or death. Multivariable Cox proportional hazards analyses were used to evaluate the relationship between the variables and prognosis. Results: Eighty-two patients (mean age, 63.1 ± 14.5 years; 42 females) were included. In the total cohort, male sex (hazard ratio [HR], 9.264; 95% confidence interval [CI], 2.021-42.457; p = 0.004), C-reactive protein (CRP) (HR, 1.080 per mg/dL; 95% CI, 1.010-1.156; p = 0.025), and COVID-affected lung proportion (CALP) (HR, 1.067 per percentage; 95% CI, 1.033-1.101; p < 0.001) were significantly associated with CEFS. CRP (HR, 1.164 per mg/dL; 95% CI, 1.006-1.347; p = 0.041) was independently associated with CEFS in the mild pneumonia group (n = 54). Normally aerated lung proportion (NALP) (HR, 0.872 per percentage; 95% CI, 0.794-0.957; p = 0.004) and NALP volume (NALPV) (HR, 1.002 per mL; 95% CI, 1.000-1.004; p = 0.019) were associated with a lower risk of critical events in the severe pneumonia group (n = 28). Conclusion: CRP in the mild pneumonia group; NALP and NALPV in the severe pneumonia group; and sex, CRP, and CALP in the total cohort were independently associated with CEFS in patients with COVID-19.

Keywords

Acknowledgement

This research was supported by Medicity Daegu funded by Daegu Metropolitan City.

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