Study Details
LaChausse, R. (2015). Evaluation of the Positive Prevention PLUS Teen Pregnancy Prevention Program. USDHHS, Office of Adolescent Health. TP2AH000007.
LaChausse, R. G. (2016). A clustered randomized controlled trial of the positive prevention PLUS adolescent pregnancy prevention program. American Journal of Public Health, 106, S91-S96. doi:10.2105/AJPH.2016.303414
Positive Prevention PLUS – High School
Program Information
Evaluation Setting
Study Sample
Research Design
3490
2
12
Study Findings
"This study evaluated the program using a clustered randomized controlled trial involving 21 high schools within six school districts in southern California. Eleven schools were randomly assigned to a treatment group that offered the Positive Prevention PLUS – High School program in 9th grade classes. Ten schools were randomly assigned to a control group that offered their regular instruction. Surveys were administered immediately before the program (baseline) and roughly one, six, and 12 months after the end of the program.
The study found that six months after the program ended, students in the schools that offered the program were significantly less likely to report they ever have had sexual intercourse and that they have had sex in the past three months without using birth control. This study found no statistically significant program impacts on having being pregnant (or gotten someone pregnant) at the time of the six-month follow-up."
NA = Not available. This means the authors did not report the information in the manuscripts associated with the studies we reviewed.
a This information was not available whenever authors did not report information for the treatment and comparison groups separately on outcome means, standard deviations, and/or sample sizes.
b Authors reported that the program effect (impact) estimate is statistically significant with a p-value of less than 0.05 based on a two-tailed test.
c For some outcomes, having less of that outcome is favorable. In those cases, an effect with a negative sign is favorable to the treatment group (that is, the treatment group had a more favorable outcome than the comparison group, on average).
d An effect shows credibly estimated, statistically significant evidence whenever it has a p-value of less than 0.05 based on a two-tailed test, includes the appropriate adjustment for clustering (if applicable), and it is not based on an endogenous subgroup.