Methods
This case-control study was conducted in two hospitals of Alborz
Province in Iran. All symptomatic adults hospitalized as COVID-19
patients with compatible CT scan findings and available RT-PCR results
were recruited in this study. The patients were categorized in positive
and negative RT-PCR groups and evaluated for symptoms, initial vital
signs, comorbidity, clinical and laboratory findings and the results
were assessed by SPSS software.