title: Using sibling differences to estimate effects of parenting on adolescent sexual risk behaviors.
abstract: OBJECTIVE
  To estimate effects of positive and involved parenting during mid-adolescence on sexual risk behaviors (frequency of intercourse, unprotected intercourse, and number of sexual partners) during late adolescence. Substantial literature suggests that supportive family contexts and parenting behaviors may discourage adolescents from engaging in early and risky sexual activities; yet methodological limitations hamper the conclusions regarding causality and directionality that can be drawn from much existing research. To address such limitations, the current study used a variety of increasingly conservative statistical modeling techniques to help control for unobserved heterogeneity and potential bias and hence to progress toward identifying causal relationships.
  
  
  METHODS
  Drawing from a nationally representative longitudinal survey of adolescents (NLSY97; N = 4980), this study used ordinary least squares (OLS) regression models, lagged regression models, and family fixed-effects models to assess whether parental knowledge, parent negativity, and family activities during midadolescence predicted differences in late adolescent sexual risk behaviors.
  
  
  RESULTS
  Even after controlling for unobserved heterogeneity across individuals and across families, parenting processes significantly predicted later adolescent sexual risk behaviors. Specifically, more regular family activities and less negative and hostile parenting during mid-adolescence predicted lower sexual risk behaviors during late adolescence.
  
  
  CONCLUSIONS
  Results concerning the buffering effects of parenting on adolescent risk behaviors help to inform prevention and intervention efforts. Through the use of more rigorous statistical methodology and large representative samples of youth, this research provides an exemplar of how survey research can seek to move closer to understanding causal processes in the exceedingly complex systems of human development.
authors.affiliation: Social Policy Research Centre, University of New South Wales, New South Wales, Australia. coleyre@bc.edu
authors.forename: Rebekah Levine
authors.initials: RL
authors.lastname: Coley
authors.forename: Bethany L
authors.initials: BL
authors.lastname: Medeiros
authors.forename: Holly S
authors.initials: HS
authors.lastname: Schindler
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D003625:Data Collection; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D016487:Parenting; D012309:Risk-Taking; D035781:Siblings; D014481:United States; D047568:Unsafe Sex / Q000706:statistics & numerical data