Abstract
Objectives: Chest CT has been widely used to screen and to evaluate the severity of COVID-19 disease in the early stages of infection without severe acute respiratory syndrome, but no prospective data are available to study the relationship between extent of lung damage and short-term mortality. The objective was to evaluate association between standardized simple visual lung damage CT score (vldCTs) at admission, which does not require any software, and 30-day mortality.
Methods: In a single-center prospective cohort of COVID-19 patients included during 4 weeks, the presence and extent of ground glass opacities(GGO), consolidation opacities, or both of them were visually assessed in each of the 5 lung lobes (score from 0 to 4 per lobe depending on the percentage and out of 20 per patient = vldCTs) after the first chest CT performed to detect COVID-19 pneumonia.
Results: Among 210 confirmed COVID-19 patients, the number of survivors and non-survivors was 162 (77%) and 48 (23%), respectively at 30 days. vldCTs was significantly higher in non-survivors, and the AUC of vldCTs to distinguish survivors and non-survivors was 0.72 (95%CI 0.628-0.807, p < 0.001); the best cut-off vldCTs value was 7. During follow-up, significant differences in discharges and 30-day mortality were observed between patients with vldCTs ≥ 7 versus vldCTs < 7: (98 [85.2%] vs 49 [51.6%]; p < 0.001 and 36 [37.9%] vs 12 [12.4%]; p < 0.001, respectively. The 30-day mortality increased if vldCTs ≥ 7 (HR, 3.16 (1.50-6.43); p = 0.001), independent of age, respiratory rate and oxygen saturation levels, and comorbidities at admission.
Conclusions: By using chest CT in COVID-19 patients, extensive lung damage can be visually assessed with a score related to 30-day mortality independent of conventional risk factors of the disease.
Key points: • In non-selected COVID-19 patients included prospectively during 4 weeks, the extent of ground glass opacities(GGO) and consolidation opacities evaluated by a simple visual score was related to 30-day mortality independent of age, respiratory rate, oxygen saturation levels, comorbidities, and hs-troponin I level at admission. • This severity score should be incorporated into risk stratification algorithms and in structured chest CT reports requiring a standardized reading by radiologists in case of COVID-19.
Keywords: COVID-19; Pneumonia; Severe acute respiratory syndrome; Tomography, x-ray computed.
【저자키워드】 COVID-19, Pneumonia, Severe acute respiratory syndrome, Tomography, X-Ray Computed, 【초록키워드】 COVID-19 pneumonia, Mortality, severity, Infection, Comorbidities, Comorbidity, tomography, oxygen, risk factor, discharge, COVID-19 disease, risk stratification, X-ray, Severe acute respiratory syndrome, oxygen saturation, Chest CT, severity of COVID-19, ground glass opacities, Algorithm, Patient, age, ground glass, Follow-up, troponin I, prospective cohort, disease, Admission, consolidation, early stage, COVID-19 patients, association, 30-Day mortality, COVID-19 patient, AUC, respiratory rate, lung damage, independent of, Radiologists, Non-survivors, acute respiratory syndrome, significant difference, 95%CI, significant differences, lobe, early stages, single-center, cut-off, radiologist, survivor, independent, non-survivor, extensive lung damage, performed, detect, evaluate, the disease, evaluated, significantly higher, lung lobe, was related, 【제목키워드】 Hospital admission, COVID-19 patient, Visual,