title: Heterogeneity in the Relationship of Substance Use to Risky Sexual Behavior Among Justice-Involved Youth: A Regression Mixture Modeling Approach.
abstract: Justice-involved adolescents engage in high levels of risky sexual behavior and substance use, and understanding potential relationships among these constructs is important for effective HIV/STI prevention. A regression mixture modeling approach was used to determine whether subgroups could be identified based on the regression of two indicators of sexual risk (condom use and frequency of intercourse) on three measures of substance use (alcohol, marijuana and hard drugs). Three classes were observed among n = 596 adolescents on probation: none of the substances predicted outcomes for approximately 18 % of the sample; alcohol and marijuana use were predictive for approximately 59 % of the sample, and marijuana use and hard drug use were predictive in approximately 23 % of the sample. Demographic, individual difference, and additional sexual and substance use risk variables were examined in relation to class membership. Findings are discussed in terms of understanding profiles of risk behavior among at-risk youth.
authors.affiliation: Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, 13120 E. 19th Ave, Mail Stop C288-04, Aurora, CO, 80045, USA. Sarah.Schmiege@ucdenver.edu.
authors.forename: Sarah J
authors.initials: SJ
authors.lastname: Schmiege
authors.affiliation: Department of Psychology and Neuroscience, University of Colorado-Boulder, Boulder, CO, USA.
authors.forename: Angela D
authors.initials: AD
authors.lastname: Bryan
mesh_terms: D000293:Adolescent; D000428:Alcohol Drinking / Q000453:epidemiology / Q000523:psychology; D003120:Colorado / Q000453:epidemiology; D005260:Female; D015658:HIV Infections / Q000517:prevention & control* / Q000523:psychology; D006801:Humans; D007604:Juvenile Delinquency / Q000523:psychology*; D008297:Male; D008385:Marijuana Smoking / Q000453:epidemiology / Q000523:psychology; D008960:Models, Psychological; D012044:Regression Analysis; D012307:Risk Factors; D012309:Risk-Taking; D012725:Sexual Behavior / Q000523:psychology*; D012935:Social Justice; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000523:psychology*; D011795:Surveys and Questionnaires
keywords: HIV/AIDS prevention; Justice-involved youth; Regression mixture modeling; Risky sexual behavior; Substance use