Assessing a public health approach to delay onset and progression of adolescent substance use: Latent transition and log-linear analyses of longitudinal family preventive intervention outcomes.

• DOI: 10.1037/0022-006x.67.5.619
• Publication Date: 2005-09-23T13:11:14Z
• Authors: Richard Spoth; Melissa Lopez Reyes; Cleve Redmond; Chungyeol Shin
• Keywords: Latent growth modeling; Longitudinal data; Longitudinal Study

This study examined the effects of Iowa Strengthening Families Program (ISFP) and Preparing for Drug-Free Years program (PDFY) on young adolescent transitions from nonuse substances to initiation progression substance use. Analyses incorporated 3 waves data collected over a 2.5-year period 329 rural adolescents. Outcomes were analyzed by using log-linear models that use status frequencies derived latent transition analyses. Effects delayed shown both ISFP PDFY at 2-year follow-up. Also this follow-up, showed among those previously reporting initiation.