SERPINC1 and stroke disorder: When the asymptomatic patients with SERPINC1 variant (n = 5), the symptomatic patients whose SERPINC1 gene was not tested (n = 4), and symptomatic patients whose SERPINC1 gene tested but AT activity was normal or not tested (n = 8), are included, the proportion of stroke is 27.8% (10/36).