Welcome to The Community Guide! Let us know what you think of the website by completing this quick survey.

HIV, Other STIs, and Teen Pregnancy: Youth Development Behavioral Interventions to Reduce Sexual Risk Behaviors in Adolescents Coordinated with – Community Service


What the CPSTF Found

About The Systematic Review

The CPSTF finding is based on evidence from a systematic review of 9 studies (search period 1980-2008). The systematic review was conducted on behalf of the CPSTF by a team of specialists in systematic review methods, and in research, practice, and policy related to preventing HIV, other STIs, and teen pregnancy.

Summary of Results

Nine studies qualified for the review.

  • The included studies targeted recruited adolescents (ages 10–19 years).
  • Rate of pregnancy: median relative decrease of 39% (interquartile interval: -59% to -9%) over a median of 9 months of observation (6 studies)
  • Self-reported sexual activity among study participants: reductions in favor of the intervention (3 studies)
  • Use of birth control or condom use: inconsistent results (3 studies)
  • Initiation of sexual intercourse: inconsistent results (3 studies)
  • Further research is required to assess the effectiveness of these interventions on use of birth control, use of condoms and on initiation of sexual intercourse.

Summary of Economic Evidence

Two studies qualified for the economic review that applied youth development and community service as part of multicomponent strategies. Monetary values are reported in 2007 U.S. dollars.

  • Both studies assessed the economic impact of pregnancies prevented due to the interventions.
  • Based on the evidence from these two studies, the interventions appear to be cost beneficial with net benefits ranging from $204 to $1053 per person per year.
    • Program costs ranged from $699 to $839 per person per year.
    • Benefits from pregnancies prevented ranged from $903 to $1891 per person per year.


These interventions were effective in rural, suburban, and urban U.S. communities for disadvantaged participants (students of low economic status, from racial or ethnic minorities, or from schools with low graduation rates or test scores).

Evidence Gaps

Content is in development.

Study Characteristics

  • All interventions included in this review had some sexual risk reduction content.
  • To be included in the review, studies had to include sexual risk behavior outcomes.
  • Among included studies, the content and delivery differed, but most studies used interactive group sessions held in school or community settings.