Laboratory Medicine and Quality Assurance

Table. 3.

RAT sensitivity using RdRp Ct values as stratified cut-offs

Ct value No. of positive results Sensitivity (%)
PCR RAT
<20 21 18 85.7
20–<25 9 6 66.7
25–<30 7 1 14.3
30–≤35 5 0 0
Total 42 25 59.5

Abbreviations: RAT, rapid antigen test; Ct, cycle threshold; PCR, polymerase chain reaction.
Lab Med Qual Assur 2023;45:25~28 https://doi.org/10.15263/jlmqa.2023.45.1.25
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