title: Sex-specific risk factors for recurrent venous thromboembolism.
abstract: BACKGROUND
  Men have higher risk of recurrent venous thromboembolism (VTE) than women but this sex difference remains unexplained. In addition, whether men and women share same risk factors for recurrent VTE is unclear.
  
  
  METHODS
  In a prospective cohort study, 583 patients (234 men and 349 women) aged 18 to 90, with a first idiopathic VTE, were followed for an average of 28 months. We assessed the association between baseline characteristics and VTE recurrence by gender.
  
  
  RESULTS
  Recurrent VTE occurred in 38 women and 36 men (incidence=4.6% and 7.5% per year respectively; HR=1.6; 95% CI, 1.0-2.6). This relation between sex and recurrent VTE was more pronounced in patients younger than 50 years and in the presence of factor V Leiden (FVL) mutation. Multivariate analyses showed that obesity (HR, 2.8 (95% CI, 1.3-6.0)) and aging (HR, 1.3 (95% CI, 1.1-1.4) per 10 years increase) were related to an increased risk of recurrent VTE in women while FVL mutation (HR, 3.5 (95% CI, 1.5-8.1)) was a risk factor of recurrent VTE among men.
  
  
  CONCLUSIONS
  Men and women do not share the same risk factors for recurrent VTE. Consequently, gender has to be taken into account to improve the risk stratification and prevention of VTE recurrence.
authors.affiliation: Inserm, CEPH Centre for research in Epidemiology and Population Health, U1018, Hormones and Cardiovascular disease team, F94807, Villejuif, France. valerie.olie@inserm.fr
authors.forename: Valérie
authors.initials: V
authors.lastname: Olié
authors.forename: Tienan
authors.initials: T
authors.lastname: Zhu
authors.forename: Isabelle
authors.initials: I
authors.lastname: Martinez
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Scarabin
authors.forename: Joseph
authors.initials: J
authors.lastname: Emmerich
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D005165:Factor V / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012008:Recurrence; D012307:Risk Factors; D012737:Sex Factors; D054556:Venous Thromboembolism / Q000453:epidemiology* / Q000235:genetics / Q000517:prevention & control*; D055815:Young Adult
chemical_list: D005165:Factor V