title: Necessity of education for oral contraceptive use in Korea: results from the fourth Korean national health and nutrition examination survey 2007-2009.
abstract: OBJECTIVE
  To compare the prevalence of contraindications to oral contraceptive (OC) use between OC users and nonusers and to identify high-risk groups related to contraindications to OC use among OC users.
  
  
  METHODS
  This health-interview survey is part of the Fourth Korean National Health and Nutrition Examination Survey 2007-2009. Of 13,561 women who participated in the survey, 672 were OC users and 3,720 were OC nonusers. The adjusted proportions of contraindications to OC use were measured according to the current OC use status. Factors associated with contraindications to OC use among OC users were identified using multivariate analysis.
  
  
  RESULTS
  The prevalence of contraindications to OC use was higher in OC users than in OC nonusers (12.6 vs. 7.8%, p < 0.001). The adjusted proportion of women who were smokers and aged ≥ 35 years was greater in OC users than in OC nonusers (5.8 vs. 1.9%, p < 0.001). Among OC users, the 40-50 age group, lower education level, and a BMI ≥ 25 had higher odds of having contraindications.
  
  
  CONCLUSIONS
  Education programs for OC use are urgently required to improve knowledge about correct use of and contraindications to OC use.
authors.affiliation: Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Jung-Yun
authors.initials: JY
authors.lastname: Lee
authors.forename: Sang Min
authors.initials: SM
authors.lastname: Park
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Ko
authors.forename: Yong-Sang
authors.initials: YS
authors.lastname: Song
mesh_terms: D000328:Adult; D000367:Age Factors; D003267:Contraception / Q000706:statistics & numerical data*; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D000075202:Contraindications; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008875:Middle Aged; D009749:Nutrition Surveys; D010353:Patient Education as Topic / Q000706:statistics & numerical data*; D056910:Republic of Korea; D012307:Risk Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D055815:Young Adult
chemical_list: D003276:Contraceptives, Oral