RT-PCR Results and Chest CT Imaging Features in Patients Hospitalized to Yozgat City Hospital with COVID-19 Suspicion

Abstract

INTRODUCTION: This study aims to investigate Chest CT findings and RT-PCR results in patients hospitalized with suspicion of COVID-19. METHODS: Between 15 March and 15 May 2020, patients hospitalized in Yozgat City Hospital with suspicion of Covid-19 were evaluated retrospectively. Chest CT findings were classified according to the modified COVID-19 reporting system created for this study. RT-PCR reference diagnostic test was accepted and the diagnostic performance of CT was evaluated. RESULTS: A total of 498 patients [54+-22 (0; 96)] were included in the study. The number of male patients [323 (65%)] was higher than female [175 (35%)]. RT-PCR test was positive in 94 (19%) of the patients. Patients with positive test results were found to be younger than negative ones. Chest CT was positive in 173 (35%) patients: 13% COVID-19 typical findings, 7% high suspect findings, 15% low suspect findings. The sensitivity of CT was 49%, the specificity was 69%, and the sensitivity of RT-PCR was 69%. Infiltrations in CT positive cases were seen in the following areas: 52% in both lungs, 40% in all lobes, 34% in lower lobes, 47% in the posterior, 43% in the anterior and posterior lung regions, 60% in the peripheral, 30% peripheral and central lung regions. DISCUSSION AND CONCLUSION: The sensitivity of chest CT in the diagnosis of COVID-19 was relatively low, but had high specificity. It may be more beneficial to use CT for rapid diagnosis in regions with a high prevalence of COVID-19. Using a standardized report format to evaluate CT findings seems necessary for patient management.

Keywords

• covid-19
• rt-pcr
• pandemic
• chest ct
• covid-19 classification.