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Table 2.

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
Vidas 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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