Fig. 2From: Performance evaluation of antigen detection rapid diagnostic test (Ag-RDT) for COVID-19 diagnosis in a primary healthcare center during the Shanghai COVID-19 quarantine periodPearson’s linear correlation between the ORF1ab and N genes. A positive linear correlation was observed between the cycle threshold (Ct) value of ORF1ab and N genes in both A Ag-RDT(−) group (slope = 1.15 + 0.05, R2 = 0.91) and B Ag-RDT(+) group (slope = 1.12 + 0.05, R2 = 0.94)Back to article page