Differential diagnosis of coronavirus disease 2019 from community-acquired-pneumonia by computed tomography scan and fol
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RESEARCH ARTICLE
Open Access
Differential diagnosis of coronavirus disease 2019 from community-acquired-pneumonia by computed tomography scan and followup Kai-Cai Liu1, Ping Xu2*, Wei-Fu Lv3* , Lei Chen4, Xiao-Hui Qiu5, Jin-Long Yao6, Jin-Feng Gu4, Bo Hu7 and Wei Wei3
Abstract Objective: Coronavirus disease 2019 (COVID-19) is currently the most serious infectious disease in the world. An accurate diagnosis of this disease in the clinic is very important. This study aims to improve the differential ability of computed tomography (CT) to diagnose COVID-19 and other community-acquired pneumonias (CAPs) and evaluate the short-term prognosis of these patients. Methods: The clinical and imaging data of 165 COVID-19 and 118 CAP patients diagnosed in seven hospitals in Anhui Province, China from January 21 to February 28, 2020 were retrospectively analysed. The CT manifestations of the two groups were recorded and compared. A correlation analysis was used to examine the relationship between COVID-19 and age, size of lung lesions, number of involved lobes, and CT findings of patients. The factors that were helpful in diagnosing the two groups of patients were identified based on specificity and sensitivity. Results: The typical CT findings of COVID-19 are simple ground-glass opacities (GGO), GGO with consolidation or grid-like changes. The sensitivity and specificity of the combination of age, white blood cell count, and groundglass opacity in the diagnosis of COVID-19 were 92.7 and 66.1%, respectively. Pulmonary consolidation, fibrous cords, and bronchial wall thickening were used as indicators to exclude COVID-19. The sensitivity and specificity of the combination of these findings were 78.0 and 63.6%, respectively. The follow-up results showed that 67.8% (112/ 165) of COVID-19 patients had abnormal changes in their lung parameters, and the severity of the pulmonary sequelae of patients over 60 years of age worsened with age. Conclusions: Age, white blood cell count and ground-glass opacity have high accuracy in the early diagnosis of COVID-19 and the differential diagnosis from CAP. Patients aged over 60 years with COVID-19 have a poor prognosis. This result provides certain significant guidance for the diagnosis and treatment of new coronavirus pneumonia. Keywords: Coronavirus disease 2019, Pneumonia, Computed tomography, X-ray, Differential diagnosis
* Correspondence: [email protected]; [email protected] 2 Department of Respiratory, Hefei Second People’s Hospital, Hefei Hospital Affiliated to Anhui Medical University, 1 Guangde Road, Hefei 230011, Anhui Province, China 3 Department of Radiology, Anhui Provincial Hospital, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, 4 Lujiang Road, Hefei 230001, Anhui Province, China Full list of author information is available at the end of the article
Background Coronavirus disease-19 (COVID-19) is an acute infectious respiratory disease caused by severe acute respiratory syndrome coronavirus 2 (
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