title: Substance use outcomes 51/2 years past baseline for partnership-based, family-school preventive interventions.
abstract: This article reports adolescent substance use outcomes of universal family and school preventive interventions 5(1/2) years past baseline. Participants were 1677 7th grade students from schools (N=36) randomly assigned to the school-based Life Skills Training plus the Strengthening Families Program: For Parents and Youth 10-14 (LST+SFP 10-14), LST-alone, or a control condition. Self-reports were collected at baseline, 6 months later following the interventions, then yearly through the 12th grade. Measures included initiation-alcohol, cigarette, marijuana, and drunkenness, along with a Substance Initiation Index (SII)-and measures of more serious use-frequency of alcohol, cigarette, and marijuana use, drunkenness frequency, monthly poly-substance use, and advanced poly-substance use. Analyses ruled out differential attrition. For all substance initiation outcomes, one or both intervention groups showed significant, positive point-in-time differences at 12th grade and/or significant growth trajectory outcomes when compared with the control group. Although no main effects for the more serious substance use outcomes were observed, a higher-risk subsample demonstrated significant, positive 12th grade point-in-time and/or growth trajectory outcomes for one or both intervention groups on all measures. The observed pattern of results likely reflects a combination of predispositions of the higher-risk subsample, the timing of the interventions, and baseline differences between experimental conditions favoring the control group.
authors.affiliation: Partnerships in Prevention Science Institute, Iowa State University, Ames, IA 50010 USA. rlspoth@iastate.edu <rlspoth@iastate.edu>
authors.forename: Richard L
authors.initials: RL
authors.lastname: Spoth
authors.forename: G Kevin
authors.initials: GK
authors.lastname: Randall
authors.forename: Linda
authors.initials: L
authors.lastname: Trudeau
authors.forename: Chungyeol
authors.initials: C
authors.lastname: Shin
authors.forename: Cleve
authors.initials: C
authors.lastname: Redmond
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D000328:Adult; D000367:Age Factors; D000428:Alcohol Drinking / Q000453:epidemiology / Q000517:prevention & control; D000435:Alcoholic Intoxication / Q000453:epidemiology / Q000517:prevention & control; D001521:Behavior Therapy / Q000379:methods*; D002648:Child; D035061:Control Groups; D003299:Cooperative Behavior; D005196:Family Therapy / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D002189:Marijuana Abuse / Q000453:epidemiology / Q000517:prevention & control; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D011615:Psychotherapy, Group / Q000379:methods; D012572:School Health Services / Q000458:organization & administration; D012907:Smoking / Q000453:epidemiology; D000074606:Smoking Prevention; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data; D019966:Substance-Related Disorders / Q000453:epidemiology / Q000517:prevention & control*; D011795:Surveys and Questionnaires