Fig. 4
From: Development of diagnostic tools for IBDV detection using plants as bioreactors
Graphical analysis of the cut off value, Se and Sp for the ELISA-SVP. a ROC curve. Numbers in brackets in the upper left corner corresponds to 1 minus Sp and Se values for the resulting cutoffs. b Cut off values obtained using Se = Sp criterion. The optimal criterion refers to the Se–Sp difference at the optimal cutoff. c Dot diagram for the 432 reference samples, 240 positives (code = 1), and 192 negatives (code = 0) analyzed with the in-house ELISA-SVP. The lines represent the cut off values (0.249 and 0.276 OD values). d Sensitivity and specificity plots according to cutpoints