Correlations between the ADAMTS13 activity recovery and the levels of initial ADAMTS13 inhibitor and anti-ADAMTS13 IgG. Data shown for n = 13. The correlations between the period from the start of TPE until the final recovery of ADAMTS13 activity to ≥10% and the initial titers of (A) ADAMTS13 inhibitor and (B) anti-ADAMTS13 IgG in the caplacizumab group. In this calculation, we excluded 1 patient who presented with an initial ADAMTS13 inhibitor level of 185.3 BU/mL and an IgG level of 1647.2 U/mL.