Fig. 4

Receiver operating curve (ROC) to assess the specificity and sensitivity of the quantitative FCIA assay for ITP diagnosis. Platelet autoantibodies were analyzed by the quantitative FCIA in 201 ITP patients and 333 non-ITP patients and healthy controls. The AUC values for autoantibodies anti-GPIX, -GPIb, -GPIIIa, -GPIIb and -P-selectin were 0.80, 0.70, 0.76, 0.77 and 0.79, respectively