Agreements between avidity tests results and estimated date of infection after redistribution of sera with values in the gray zone and belonging to group CI > 4 TBC.
|Redistribution of sera||Groups||Architect avidity
|High||Low||Kappa coefficient||Number of discrepant results with the estimated date of infection||High||Low||Kappa coefficient||Number of discrepant results with the estimated date of infection|
|Exclusion of sera in gray zone avidity and in group CI > 4 TBC||Group AI < 4||0||17||0.660||12||0||16||0.805||6|
|Group CI > 4||63||12||76||6|
|Gray zone avidity in high avidity sera and group CI > 4 TBC in CI > 4 group||Group AI < 4||0||17||0.538||20||1||16||0.668||12|
|Group CI > 4 bis: CI > 4 TBC + CI > 4||80||20||89||11|
|Gray zone avidity in high avidity sera and group CI > 4 TBC in group AI < 4||Group AI < 4 bis: CI > 4 TBC + AI < 4||1||25||0.721||13||5||21||0.712||11|
|Group CI > 4||79||12||85||6|
|Gray zone avidity in low avidity sera and group CI > 4 TBC in group AI < 4||Group AI < 4 bis: CI > 4 TBC + AI < 4||0||26||0.500||28||0||26||0.693||15|
|Group CI > 4||63||28||76||15|
Notes. In the first redistribution (exclusion of samples in gray zone avidity and samples belonging to group CI > 4 TBC), 25 and 19 sera for Architect and Vidas avidity assays were excluded, respectively. In bold, the three best CKC obtained depending the exclusion/redistribution of sera.
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