title: Factor V Leiden and prothrombin G20210A mutations in young adults with cryptogenic ischemic stroke.
abstract: The association between factor V Leiden (FVL) and prothrombin G20210A (PT 20210) mutations and ischemic stroke remains controversial, particularly in young adults with cryptogenic stroke. Prevalence of FVL (4.1%) and PT 20210 (8.2%) mutations was assessed in 49 patients under 50 years with cryptogenic stroke and compared with controls. Odd ratio (OR) for cryptogenic stroke was 2.62 (95% CI, 0.49-13.95) for FVL and 3.75 (95% CI, 1.05-13.34) for PT 20210 and 3.28 (95% CI, 1,17-9.20) for some recognized genetic thrombophilic defect. Moreover, the OR for cryptogenic stroke in young women using oral contraceptives (OC) was 3.59 (95% CI, 1.28-10.5). When some genetic thrombophilic defect was associated with OC, the OR was much higher (OR: 14.27; 95% CI, 0.66-309.99). Our results suggest that in the Mediterranean populations the PT 20210 mutation, but not FV Leiden, is a risk factor for cryptogenic stroke in young adults. OC use is also a significant risk factor for cryptogenic stroke, which is increased in women with some genetic thrombotic risk factor.
authors.affiliation: La Fe University Hospital, Department of Clinical Pathology, Avd. Campanar 21, 46009 Valencia, Spain. aznar_jus@gva.es
authors.forename: Justo
authors.initials: J
authors.lastname: Aznar
authors.forename: Yolanda
authors.initials: Y
authors.lastname: Mira
authors.forename: Amparo
authors.initials: A
authors.lastname: Vayá
authors.forename: Dolores
authors.initials: D
authors.lastname: Corella
authors.forename: Fernando
authors.initials: F
authors.lastname: Ferrando
authors.forename: Piedad
authors.initials: P
authors.lastname: Villa
authors.forename: Amparo
authors.initials: A
authors.lastname: Estellés
mesh_terms: D000293:Adolescent; D000328:Adult; D002545:Brain Ischemia / Q000453:epidemiology / Q000209:etiology / Q000235:genetics*; D016022:Case-Control Studies; D003276:Contraceptives, Oral / Q000009:adverse effects; D005165:Factor V; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017720:Molecular Epidemiology; D016017:Odds Ratio; D017354:Point Mutation; D011516:Prothrombin / Q000235:genetics*; D012307:Risk Factors; D013030:Spain / Q000453:epidemiology; D020521:Stroke / Q000453:epidemiology / Q000209:etiology / Q000235:genetics*; D019851:Thrombophilia / Q000150:complications / Q000235:genetics
chemical_list: D003276:Contraceptives, Oral; C095381:factor V Leiden; D005165:Factor V; D011516:Prothrombin