Characterization of Sera with Discordant Results from Reverse Sequence Screening for Syphilis

Figure 5

ROC curve of Architect Syphilis TP for prediction of TP-PA results on 126 CIA(+)/RPR(−) sera. The diagnostic sensitivity and specificity are 82.7% and 87.5% for an S/CO ratio of 3.1. The area under the curve (95% CI) is 0.872 (0.782–0.963).