Table 4.

Percentage agreement between the Elecsys syphilis assay and the final syphilis status as derived from the composite reference algorithm.

Study cohortPositive percent agreementNegative percent agreement
% (n/N)95% CI% (n/N)95% CI
Overall99.50% (400/402)98.21–99.9499.16% (2239/2258)98.69–99.49
High risk100 (49/49)92.75–10099.83 (572/573)99.03–100
Low risk100 (17/17)80.49–10099.77 (883/885)99.19–99.97
HIV positive100 (162/162)97.75–10095.59 (282/295)92.58–97.63
Pregnant100 (15/15)78.20–100100 (301/301)98.78–100
Staged98.59 (140/142)95.00–99.83100 (12/12)73.54–100
Healthy population100 (17/17)80.49–10098.44 (189/192)95.50–99.68