factors associated with stroke and the frequency of stroke were systemic thrombosis ( 30 % ) , elevated partial thromboplastin time ( 36 % ) , spontaneous abortion ( 50 % ) , age over 60 years ( 57 % ) , transient ischemic attacks ( 57 % ) , previous stroke ( 64 % ) , and cardiac valvular disease ( 86 % ) .
C0007787
transient ischemic attacks
C0038454
stroke