Table 2 Sensitivities of the various assays based on the analysis of 999 confirmed syphilis cases according to clinical stage.

From: Evaluation of the Elecsys syphilis immunoassay for routine screening of serum samples in China

Stage

Elecsys vs. Architect

Elecsys vs. InTec ELISA

Elecsys vs. KHB ELISA

N

Elecsys

Architect

N

Elecsys

InTec ELISA

N

Elecsys

KHB ELISA

I (primary)

20

100%

100%

44

100%

100%

2

100%

100%

II (secondary)

55

100%

100%

74

100%

100%

24

100%

100%

III (tertiary)

6

100%

100%

24

100%

100%

6

100%

100%

Latent

96

100%

100%

149

100%

100%

56

100%

100%

Unclassified

178

100%

100%

100

100%

100%

165

100%

100%

Total

355

100%

100%

391

100%

100%

253

100%

100%

  1. Definition of abbreviations: ELISA = enzyme-linked immunosorbent assay.