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Table 1 Results of the ELISA plates for 204 blood samples

From: Negative studies are helpful to compute the specificity of diagnostic tests: measuring Trypanosoma cruzi seroprevalence in Guanajuato, Mexico

 

ELISA plate #1

ELISA plate #2

Blank

0.035

0.036

Corrected negative control 1

0.011

0.002

Corrected negative control 2

−0.003

0.008

Corrected negative control 3

0.003

−0.002

Average positive controls

1.000

1.000

Cut off

0.303

0.302

Cut off ± 10 % (indeterminate)

Upper limit = 0.334

Lower limit = 0.273

Upper limit = 0.333

Lower limit = 0.272

Corrected sample results (n = 204)

−0.014 to 0.026

−0.003 to 0.022