title: Gender, mature appearance, alcohol use, and dating as correlates of sexual partner accumulation from ages 16-26 years.
abstract: OBJECTIVE
  To determine growth in sexual partnering from age 16-26 years, and to test whether biological and social factors launched these growth patterns.
  
  
  METHODS
  A prospective design was used. Participants were 176 young people (47% female) followed from birth to age 26 years. Sexual partnering was measured as the accumulated number of different sexual intercourse partners at ages 16, 19, 23, and 26 years. Physical appearance of maturity, alcohol use, and dating were measured at ages 13-16 via observations, interviews, and questionnaires.
  
  
  RESULTS
  Mature appearance at age 13 years, use of alcohol more than monthly at age 16, and a history of a steady romantic partner before age 16 were each associated with a greater number of sexual intercourse partners by age 16. However a more mature appearance, more frequent alcohol use, and greater dating involvement did not foreshadow a steeper accumulation of sexual partners between ages 16 and 26. Only gender had such a "growth" influence, with males accruing sexual partners more rapidly from the ages of 16-26 years when compared with females.
  
  
  CONCLUSIONS
  Adolescents had accumulated a higher number of sexual partners by age 16 years when they looked older, drank alcohol more frequently, and were more involved with dating in early to middle adolescence. Also male gender was associated with accumulation of sexual partners more rapidly between ages 16 and 26 years, and there was little indication that the accumulation of different sexual partners had begun to slow by age 26 for the average participant.
authors.affiliation: School of Psychology, Griffith University, Gold Coast, QLD, Australia. m.zimmer-gembeck@griffith.edu.au
authors.forename: Melanie J
authors.initials: MJ
authors.lastname: Zimmer-Gembeck
authors.forename: W Andrew
authors.initials: WA
authors.lastname: Collins
mesh_terms: D000293:Adolescent; D000328:Adult; D000428:Alcohol Drinking; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D011446:Prospective Studies; D012737:Sex Factors; D012747:Sexual Partners