title: Timing and circumstances of first sex among female and male youth from select urban areas of Nigeria, Kenya, and Senegal.
abstract: OBJECTIVE
  To examine the timing and circumstances of first sex among urban female and male youth in Kenya, Nigeria, and Senegal.
  
  
  METHODS
  Recently collected data are used to examine youth sexual behaviors in Kenya, Nigeria, and Senegal. In each country, a large, representative sample of women (ages 15-49) and men (ages 15-59) was collected from multiple cities. Data from youth (ages 15-24) are used for the analyses of age at sexual initiation, whether first sex was premarital, and modern family planning use at first sex. Cox proportional hazard models and logistic regression analyses are performed to determine factors associated with these outcomes.
  
  
  RESULTS
  Across all three countries, a greater percentage of male youth than female youth report initiating sex with a nonmarital partner. More educated youth are less likely to have initiated sex at each age. In Nigeria and Senegal, poor female youth report earlier first sex than wealthier female youth. In Kenya, richer female youth are more likely to have premarital first sex and to use contraception/condom at first sex than their poorer counterparts. Older age at first sex and youth who report that first sex was premarital are significantly more likely to use a method of contraception (including condom) at first sex. City-specific distinctions are found and discussed for each outcome.
  
  
  CONCLUSIONS
  Programs seeking to reduce HIV and unintended pregnancy risk among urban youth need to undertake needs assessments to understand the local context that influences the timing and circumstances of first sex in each city/country-specific context.
authors.affiliation: Department of Maternal & Child Health, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Carolina Population Center at The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. Electronic address: ilene_speizer@unc.edu.
authors.forename: Ilene S
authors.initials: IS
authors.lastname: Speizer
authors.forename: Jean Christophe
authors.initials: JC
authors.lastname: Fotso
authors.forename: Joshua T
authors.initials: JT
authors.lastname: Davis
authors.forename: Abdulmumin
authors.initials: A
authors.lastname: Saad
authors.forename: Jane
authors.initials: J
authors.lastname: Otai
mesh_terms: D000293:Adolescent; D000367:Age Factors; D003075:Coitus / Q000523:psychology; D003268:Contraception Behavior; D003431:Cross-Cultural Comparison; D003906:Developing Countries; D004522:Educational Status; D005260:Female; D015658:HIV Infections / Q000208:ethnology / Q000517:prevention & control; D006801:Humans; D007630:Kenya; D016015:Logistic Models; D008297:Male; D009549:Nigeria; D011203:Poverty / Q000523:psychology / Q000706:statistics & numerical data; D011247:Pregnancy; D011253:Pregnancy in Adolescence / Q000208:ethnology / Q000517:prevention & control; D016016:Proportional Hazards Models; D012675:Senegal; D012737:Sex Factors; D012725:Sexual Behavior / Q000523:psychology / Q000706:statistics & numerical data; D014505:Urban Population / Q000706:statistics & numerical data*; D055815:Young Adult
keywords: Condom use; Kenya; Nigeria; Premarital sex; Senegal; Sexual initiation; Urban