VWF and stroke disorder: In women of group 4 (no history of stroke or migraine), the mean (SD) levels of fibrinogen, VWF:Ag, FIX, and FXI:C were 3.7 (0.7) g/L, 140 (32)%, 1.2 (0.3) IU, and 1.1 (0.2) IU/mL, respectively.