Erratum: Digital Interventions for Problematic Cannabis Users in Non-Clinical Settings: Findings from a Systematic Review and Meta-Analysis

Background: Existing cannabis treatment programs reach only a very limited proportion of people with cannabis-related problems. The aim of this systematic review and meta-analysis was to assess the effectiveness of digital interventions applied outside the health care system in reducing problematic cannabis use. Methods: We systematically searched the Cochrane Central Register of Controlled Trials (2015), PubMed (2009-2015), Medline (2009-2015), Google Scholar (2015) and article reference lists for potentially eligible studies. Randomized controlled trials examining the effects of internet- or computer-based interventions were assessed. Study effects were estimated by calculating effect sizes (ESs) using Cohen's d and Hedges' g bias-corrected ES. The primary outcome assessed was self-reported cannabis use, measured by a questionnaire. Results: Fifty-two studies were identified. Four studies (including 1,928 participants) met inclusion criteria. They combined brief motivational interventions and cognitive behavioral therapy delivered online. All studies were of good quality. The pooled mean difference (Δ = 4.07) and overall ES (0.11) give evidence of small effects at 3-month follow-up in favor of digital interventions. Conclusions: Digital interventions can help to successfully reduce problematic cannabis use outside clinical settings. They have some potential to overcome treatment barriers and increase accessibility for at-risk cannabis users.

背景：当前大麻相关治疗项目仅能覆盖极少量存在大麻使用相关问题的人群。本项系统评价与元分析旨在评估医疗保健体系外实施的数字化干预措施在减少问题性大麻使用方面的有效性。方法：本研究系统检索了2015年版的Cochrane对照试验中心注册库（Cochrane Central Register of Controlled Trials）、2009-2015年的PubMed、Medline、2015年的Google Scholar以及相关文献的参考文献列表，以筛选潜在符合纳入标准的研究。本研究对评估基于互联网或计算机的干预措施效果的随机对照试验（Randomized Controlled Trial, RCT）进行了评估。研究效应通过计算效应量（effect sizes, ES）进行估算，采用Cohen's d与Hedges' g偏差校正效应量。本研究评估的主要结局为通过问卷测得的自我报告大麻使用情况。结果：本研究共检索到52项相关研究，其中4项（包含1928名受试者）符合纳入标准，这些研究均采用了线上实施的简短动机干预与认知行为疗法（cognitive behavioral therapy, CBT）联合干预方案。所有纳入研究的质量均良好。合并均差（Δ=4.07）与总体效应量（0.11）显示，在3个月随访节点，数字化干预措施呈现出小幅的有益效果。结论：在临床场景之外实施的数字化干预措施可有效减少问题性大麻使用，其具备克服治疗壁垒、提升高风险大麻使用者治疗可及性的应用潜力。