Evaluation Studies
Spoth, R.L., Clair, S., Shin, C., Redmond, C. (2006). Long-Term Effects of universal preventative interventions on methamphetamine use Among Adolescents. Archives of Pediatric & Adolescent Medicine, 160, 876-882.

Objective: To examine the long-term effects of universal preventive interventions on methamphetamine use by adolescents in the general population during their late high school years.

Design: Two randomized, controlled prevention trials.

Setting: Public schools in the Midwest from 1993 to 2004.

Participants: Study 1 began with 667 sixth grade students from 33 rural public schools; the follow-up included 457 students. Study 2 began with 679 seventh grade students from 36 rural public schools; the follow- up assessment included 597 students.

Interventions: In study 1, schools were assigned to the Iowa Strengthening Families Program (ISFP), Preparing for the Drug Free Years, or a control condition. In study 2, schools were assigned to a revised ISFP (SFP 10-14) plus Life Skills Training (SPF 10-14_LST), LST alone, or a control condition.

Results: Self-reports of lifetime and past-year methamphetamine use were collected at 6? years past baseline (study 1) and at 4? and 5? years past baseline (study 2). In study 1, the ISFP past-year rate was 0.0% compared with 3.2% in the control condition (P=.04). In study 2, SFP 10-14_LST showed significant effects on lifetime and past-year use at the 4?year follow-up (eg, 0.5% lifetime use in the intervention condition vs 5.2% in the control condition, P=.006); both SFP 10-14_LST and LST alone had significant lifetime use effects at the 5? year follow-up.

Conclusion: Brief universal interventions have potential for public health impact by reducing methamphetamine use among adolescents.


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