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Table 2 Correlation between detection of Treponema pallidum antibodies by plasma TPPA and DBS TPPA

From: The development and validation of dried blood spots for external quality assurance of syphilis serology

(n=1147)

 

TPPA plasma

 
  

Positive

Negative

Total

DBS TPPA

Positive

169

10

179

 

Negative

8

960

968

 

Total

177

970

1147*

  1. sensitivity of DBS against plasma 95.5% (95% CI: 91.3–98,0%).
  2. specificity of DBS against plasma 99.0% (95% CI: 98.1–99.5%).
  3. * excluding 34 indeterminate results.