Figure 4
From: Variability in detection and quantification of interferon β-1b–induced neutralizing antibodies
Consistency of neutralizing antibody (NAb) status classification across Laboratories A (II), B, C and D. The numbers on the x-axis indicate the numbers of laboratories that report a specific sample as being NAb positive. 0 = no laboratory reported a titer value above the lower limit of quantification (LLOQ); 1, 2, 3 = one, two or three laboratories out of four reported a quantifiable NAb titer; 4 = all four laboratories measured a NAb titer value above the LLOQ. The y-axis provides the percentage of samples in each category. This analysis involved the 121 patient samples with valid results from all four laboratories.