TABLE 2—
Overall Effects of Adolescent Pregnancy Prevention Programs by Outcome: Meta-Analysis of Federally Funded Adolescent Pregnancy Prevention Program Evaluations, United States, 2010–2015
| Outcome Category | No. of Studies (k) | No. of Effect Sizes Reported | Effect Size, LOR or Hedges’ g (95% CI) | τ2 | I 2, % |
| Ever had sex | 24 | 43 | 0.04 (–0.04, 0.13) | 0.01 | 24 |
| Recent sexual activity | 25 | 53 | 0.02 (–0.05, 0.09) | 0.01 | 25 |
| Recent unprotected sexual activity | 35 | 87 | 0.06 (–0.03, 0.14) | 0.02 | 27 |
| Proportion of recent sexual experiences that were unprotecteda | 1 | 1 | −0.29 (–0.85, 0.27) | NA | NA |
| Sexually transmitted infections | 2 | 2 | 0.17 (–0.70, 1.04) | 0.28 | 70 |
| Ever pregnant or parent | 7 | 15 | 0.11 (–0.31, 0.53) | 0.07 | 51 |
| Recent pregnancy or parenting | 5 | 9 | 0.10 (–0.77, 0.96) | 0.00 | 0 |
| No. of sexual partners | 5 | 9 | 0.03 (–0.04, 0.09) | 0.00 | 0 |
| No. of sexual experiences | 1 | 1 | 0.03 (–0.12, 0.18) | NA | NA |
Note. CI = confidence interval; LOR = log odds ratio; NA = not applicable.
a
Without condoms or other forms of birth control.