Figure 1.
Comparison of historical VWF:Ag with VWF:Ag on entry into the ZPMCB-VWD. On enrollment into the ZPMCB-VWD, local centers entered the results (y-axis) of the diagnostic tests used to establish the diagnosis of VWD. Samples were drawn and sent to the central laboratory and the results of the VWF:Ag are entered on the a-axis. The correlation coefficient was r2 = 0.2243.
