McCambridge Jim, Slym Renee L, Strang John
Centre for Research on Drugs and Health Behaviour, Department of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK.
Addiction. 2008 Nov;103(11):1809-18. doi: 10.1111/j.1360-0443.2008.02331.x. Epub 2008 Sep 4.
To test the effectiveness of motivational interviewing (MI) in comparison with drug information and advice in opportunistically securing reductions in drug-related risk among young cannabis users not seeking help.
Randomized controlled trial.
Eleven London Further Education colleges.
A total of 326 students aged 16-19 years who smoked cannabis weekly or more frequently.
Participants were randomized to a single-session intervention of MI or drug information and advice-giving.
Cannabis use, cigarette smoking and alcohol consumption and harm outcomes were assessed after both 3 and 6 months.
No differences were found between MI and drug information and advice, although MI fidelity was not high. There were wide-ranging individual practitioner effects on observed outcomes and a practitioner-intervention interaction was detected in relation to cannabis cessation after 3 months. Change over time was more pronounced for cannabis use than for other drug use.
Further study of the nature and consequences of MI fidelity, and individual practitioner effects more generally, is needed. Advice may be an effective brief intervention with young cannabis users in its own right and should be evaluated further in trials.
比较动机性访谈（MI）与药物信息及建议在偶然情况下降低未寻求帮助的年轻大麻使用者药物相关风险方面的效果。
随机对照试验。
伦敦的11所继续教育学院。
总共326名年龄在16 - 19岁之间、每周吸食大麻或更频繁的学生。
参与者被随机分配接受单次MI干预或药物信息及建议干预。
在3个月和6个月后评估大麻使用、吸烟、饮酒情况及危害结果。
尽管MI的保真度不高，但MI与药物信息及建议之间未发现差异。个体从业者对观察结果有广泛影响，并且在3个月后发现从业者 - 干预之间存在与大麻戒断相关的相互作用。随着时间的推移，大麻使用的变化比其他药物使用更为明显。
需要进一步研究MI保真度的性质和后果，以及更普遍的个体从业者效应。建议本身可能是对年轻大麻使用者有效的简短干预措施，应在试验中进一步评估。
