title: SOGC clinical practice guidelines: Oral contraceptives and the risk of venous thromboembolism: an update: no. 252, December 2010.
abstract: OBJECTIVE
  To provide current and emerging evidence on oral contraceptives and the risk of venous thromboembolism.
  
  
  METHODS
  Articles published in English from 2005 were retrieved through searches of PubMed and Medline, using the following terms: venous thromboembolism, VTE, contraception, oral contraceptives, hormonal contraception. Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies. Searches were updated on a regular basis and incorporated in the guideline to May 2010. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology assessment-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies.
  
  
  METHODS
  The quality of evidence was rated using the criteria described by the Canadian Task Force on Preventive Health Care (Table).
authors.forename: Robert
authors.initials: R
authors.lastname: Reid
authors.forename: Nicholas
authors.initials: N
authors.lastname: Leyland
authors.forename: Wendy
authors.initials: W
authors.lastname: Wolfman
authors.forename: Catherine
authors.initials: C
authors.lastname: Allaire
authors.forename: Alaa
authors.initials: A
authors.lastname: Awadalla
authors.forename: Carolyn
authors.initials: C
authors.lastname: Best
authors.forename: Sheila
authors.initials: S
authors.lastname: Dunn
authors.forename: Madeleine
authors.initials: M
authors.lastname: Lemyre
authors.forename: Violaine
authors.initials: V
authors.lastname: Marcoux
authors.forename: Chantal
authors.initials: C
authors.lastname: Menard
authors.forename: Frank
authors.initials: F
authors.lastname: Potestio
authors.forename: David
authors.initials: D
authors.lastname: Rittenberg
authors.forename: Sukhbir
authors.initials: S
authors.lastname: Singh
authors.forename: Vyta
authors.initials: V
authors.lastname: Senikas
mesh_terms: D002170:Canada; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D012307:Risk Factors; D054556:Venous Thromboembolism / Q000139:chemically induced*
chemical_list: D003276:Contraceptives, Oral