Title | Deterioration over time in effect of motivational interviewing in reducing drug consumption and related risk among young people |
Publication Type | Journal Article |
Year of Publication | 2005 |
Authors | McCambridge, J, Strang, J |
Journal | Addiction |
Volume | 100 |
Pagination | 470-478 |
Date Published | Apr |
Publication Language | eng |
ISBN Number | 0965-2140 (Print)0965-2140 (Linking) |
Accession Number | 15784061 |
Keywords | *Motivation, Adolescent, Adult, Cluster Analysis, Extinction, Psychological, Female, Humans, Interview, Psychological/*methods/standards, Male, Psychotherapy, Brief/*methods/standards, Questionnaires, Risk, Substance-Related Disorders/prevention & control/*therapy |
Abstract | AIM: To test whether beneficial effects of a single session of Motivational Interviewing (MI) on alcohol, tobacco and illicit drug use apparent after 3 months were maintained until 12 months. DESIGN: Cluster randomized trial, allocating 200 young people in the natural groups in which they were recruited to either MI (n = 105) or to an assessment-only control condition (n = 95). SETTING: Ten further education colleges across inner London. PARTICIPANTS: Two hundred young people who were current users of illegal drugs (age range 16-20 years) with whom contact was established through peers trained for the project. INTERVENTION: The intervention was adapted from MI in the form of a topic-based 1-hour single-session discussion. MEASUREMENTS: Changes in cigarette, alcohol, cannabis and other drug use and perceptions of risk and harm between the time of recruitment and follow-up interviews after 3 and 12 months. FINDINGS: A satisfactory follow-up rate (81%) was achieved. After 12 months, 3-month differences between MI and assessment-only groups have disappeared almost entirely. Unexpected improvements by the assessment-only control group on a number of outcomes suggest the possibility of reactivity to the research assessment at 3-month follow-up. CONCLUSION: In the terms of the original experiment, there is little evidence of enduring intervention effectiveness shown by between-group differences after 12 months. Deterioration of effect is the most probable explanation, although reactivity to 3-month assessment, a late Hawthorne effect, cannot be ruled out. |
URL | http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=15784061 |