title: [Emergency contraception in Mexican students].
abstract: OBJECTIVE
  To evaluate emergency contraception (EC) knowledge and use as well as identify factors associated to correct EC knowledge among public schools students in Morelos, Mexico.
  
  
  METHODS
  Cross-sectional study conducted in 2003-2004 in a sample of 1,550 students (ages 14-24). Logistic regression was used to identify factors associated to EC correct knowledge.
  
  
  RESULTS
  Among all, 40% were men and 60% women with an average age of 19 years. Sixty percent have heard about EC, nevertheless, only 45% have correct knowledge about it; 3% of sexually active students (43%) reported its use. Factors associated to EC correct knowledge are: being a woman (OR=1.66; CI 1,33, 2,06), being sexually active (OR=1.77; CI 1,43, 2,18), middle income (OR=1.87; CI 1,04, 3,37), living in a semi-urban zone (OR=1.34; CI 1,02, 1,77), drinking alcohol (OR=1.78; CI 1,42, 2,22).
  
  
  CONCLUSIONS
  In Morelos, adolescents' knowledge of EC is scarce. Specific messages regarding its correct use are necessary.
authors.affiliation: Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Ahidee
authors.initials: A
authors.lastname: Leyva-López
authors.forename: Rubén
authors.initials: R
authors.lastname: Chávez-Ayala
authors.forename: Erika E
authors.initials: EE
authors.lastname: Atienzo
authors.forename: Betania
authors.initials: B
authors.lastname: Allen-Leigh
authors.forename: Dolores
authors.initials: D
authors.lastname: Ramírez-Villalobos
authors.forename: Elsa
authors.initials: E
authors.lastname: Yunes-Díaz
authors.forename: Leonor
authors.initials: L
authors.lastname: Rivera-Rivera
mesh_terms: D000293:Adolescent; D044363:Contraception, Postcoital / Q000706:statistics & numerical data*; D003430:Cross-Sectional Studies; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008800:Mexico; D013334:Students; D011795:Surveys and Questionnaires; D055815:Young Adult