The abstinence-only grants have been controversial from the start.
Supporters say comprehensive sex education sends a mixed message and that abstinence is the only method that is 100 percent effective in preventing pregnancy and sexually transmitted disease. Critics say abstinence education simply doesn't stop teens from having sex, and those teens need more information about how to reduce pregnancy and disease.
In April 2007, a federally funded study of four abstinence-only programs by Mathematica Policy Research Inc., found that participants had just as many sexual partners as nonparticipants and had sex at the same median age as nonparticipants. The four programs had taught students about human anatomy and sexually transmitted diseases, helped them improve their communication skills, manage peer pressure, set personal goals and build self-esteem.
For Colorado, the study results sealed the decision to get out of the program. Dr. Ned Calonge, the state's chief medical officer, said Mathematica's methods were the gold standard for scientific studies.
"To show no benefit compared to nothing. That was striking," Calonge said. "These are tax dollars that are going for no useful purpose, and it would not be responsible for us to take those dollars."