title: Patterns of treatment utilization and methamphetamine use during first 10 years after methamphetamine initiation.
abstract: The study examined joint trajectories of methamphetamine (MA) use and substance abuse treatment utilization and identified differences among pattern groups for a sample of 348 treated for MA use. Results from group-based trajectory modeling showed that treatment utilization during the first 10 years after initiation of MA use could be categorized into three distinctive patterns: about half the MA users have a pattern of low treatment utilization; one-fourth follow a quicker-to-treatment trajectory with higher probability of treatment during the first 5 years of MA use and less treatment in the next 5 years; and one-fourth have a slower-to-treatment trajectory with more treatment during the second half of the 10-year period. Four MA use patterns were identified: consistently low use, moderate, and high use, as well as a decreasing use pattern. Periods of greater likelihood of treatment participation were associated with periods of decreasing or lower frequency of MA use.
authors: UCLA Integrated Substance Abuse Programs, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA 90025, USA. lbrecht@ucla.edu
authors: Mary-Lynn
authors: ML
authors: Brecht
authors: Katherine
authors: K
authors: Lovinger
authors: Diane M
authors: DM
authors: Herbeck
authors: Darren
authors: D
authors: Urada
mesh_terms: D000328:Adult; D019969:Amphetamine-Related Disorders / Q000534:rehabilitation*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008694:Methamphetamine / Q000008:administration & dosage* / Q000009:adverse effects; D008962:Models, Theoretical; D016320:Substance Abuse Treatment Centers; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D008694:Methamphetamine