TABLE 4.

Sensitivity of DPP Syphilis Screen & Confirm nontreponemal antibody component with visual operator inspection and microreader analysis (cutoff of 9.0)

RPR titer	Sensitivity (95% CI)
	Operator result	Microreader result
Categorized RPR titers
≤1:4	58.5 (50.8–65.8)	53.9 (46.3–61.5)
≥1:8	96.9 (89.4–99.6)	96.9 (89.4–99.6)
Detailed RPR titers
1:1	26.7 (16.9–38.5)	19.7 (11.2–30.8)
1:2	71.1 (57.9–82.2)	66.1 (52.6–77.9)
1:4	91.3 (79.2–97.5)	91.3 (79.2–97.5)
1:8	94.5 (81.8–99.3)	94.5 (81.8–99.3)
1:16	100.0 (83.1–100.0)	100.0 (83.1–100.0)
1:32	100.0 (29.2–100.0)	100.0 (29.2–100.0)
1:64	100.0 (39.7–100.0)	100.0 (39.7–100.0)
1:256	100.0 (15.8–100.0)	100.0 (15.8–100.0)