Robertson, A., Thomas, C., Lawrence, J., & Pack, R. (2005). Sexually Transmitted Diseases, 32(2), 155-122.

Synopsis
The researchers sought to determine the prevalence, multiple correlates, and gender differences in chlamydia and gonorrhea infections among youths ages 13-18 in a regional youth detention center in the southern United States. The cross-sectional study's goal was to identify factors associated with the youths' STD risk that might inform the development of specially tailored interventions. Rates of undiagnosed chlamydia were 24.7 percent for girls in the facility and 8.1 percent for boys. Gonorrhea was detected in 7.3 percent of girls and 1.5 percent of boys. STD predictors differed between girls and boys. Gender, race, and age account for 52 percent of the total variance in STD infections; behavior for about one-third of the total variance; psychologic variables for 8.6 percent; and family variables for 7.2 percent. "An approach that considers psychologic and social influences on adolescent sexual behavior is useful for identifying potential risk and protective factors of adolescent STD/HIV risk that are amenable to prevention," the authors concluded.

Source
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15668619