Objective: Coronavirus disease-19(COVID-19) is the most serious infectious disease in the world at present. Accurate diagnosis of this disease in clinic is very important. this study aims to improve the differential ability of COVID-19 and other community acquired pneumonia(CAP) by CT,and to evaluate the short-term prognosis of 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 21,2020 to February 28, 2020 were retrospectively analyzed.
Results：The sensitivity and specificity of age, white blood cell count, and ground glass shadow in the diagnosis of COVID-19 were 92.7% and 66.1%,respectively. Pulmonary consolidation,fiber cord,and bronchial wall thickening were used as indicators to exclude COVID-19.The sensitivity and specificity were 78.0% and 63.6%, respectively.The follow-up results showed that 67.8% (112/165) of the cases of COVID-19 had abnormal changes in lung residual levels,and the pulmonary sequelae of patients over 60 years of age became more severe with age.
Conclusion：CT combined with clinical conditions, lung lesion density、 morphological characteristics and other associated signs, has a high accuracy for the early diagnosis of COVID-19 and the differential diagnosis of CAP.patients with COVID-19 infection over 60 years have poor prognosis.