. Author manuscript; available in PMC: 2010 Jul 31.

Published in final edited form as: J Immunol Methods. 2009 May 5;346(1-2):18–25. doi: 10.1016/j.jim.2009.04.013

Table II.

ELISA performance based on cut-off value^a

threshold	sensitivity	specificity	J^b
13.78	74.42	90.91	0.6533
16.14	74.42	94.55	0.6897
18.97^c	74.427	98.18	0.726
19.52	69.77	98.18	0.6795
22.50	65.12	98.18	0.633

The test variable is expressed as index value based on internal positive and negative calibrators.

Youden’s Index

Cut-off selected for data analysis