Abstract
Objective: This study aims to investigate the relationship between prothrombin time (PT), activated partial thromboplastin time (aPTT), INR (International Normalized Ratio), and D-dimer levels, platelet (PLT) levels at hospital admission, and positivity or negativity of Polymerase Chain Reaction (PCR) test results in patients with suspected coronavirus disease-19 (COVID-19) followed at COVID-19 services.
 Method: This study was performed on 238 patients with the prediagnosis of COVID-19, all patients are hospitalised in Samsun city at our hospital between 11 March 2020-30 May 2020. According to COVID-19 PCR test results, PCR test negative 119 individua and PCR test positive 119 patients were included in the study. PT, aPTT, D-dimer, INR, and PLT levels were examined. 
 Result: While PCR test negative individuals had a mean PT value of 11.46±0.86 sec, PCR test positive patients had a mean PT value of 12.97±3.65 sec (p
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