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Table 3 Comparison of SFTSV RNA and IgM antibody detection

From: Detection of SFTS virus RNA and antibodies in severe fever with thrombocytopenia syndrome surveillance cases in endemic areas of China

Days after onset SFTSV RNA SFTSV IgM P value (McNemar test) Kappa value
Positive Negative
N (%) N (%)
≤14 days Positive 15(62.5) 9(37.5) 0.06 0.307
Negative 26 (23.2) 86(76.8)
≥15 days Positive 2(100) 0(0) 0.25 0.471
Negative 3(23.1) 10(76.9)
Total Positive 17(65.4) 9(34.6) 0.002 0.323
Negative 29(23.2) 96(76.8)