[A review about new approaches using the Internet and computer technology for people with drug use disorder].

Purpose: Over the past two decades, computerized and Internet-based interventions for the treatment of various health problems, including substance abuse, have been developed and used to resolve treatment-related issues. The purpose of this study is to review selected studies that conducted computerized and Internet-based psychosocial interventions for people with drug-use problems.

Methods: We used a PubMed search to identify relevant studies to our review based on the following inclusion criteria: 1) the study participants were drug users; 2) the Internet or computer technologies were used for the interventions; 3) the study used psychosocial interventions; and 4) meta-analysis and randomized controlled trial (RCT). In total, 12 studies (meta-analysis = 1, RCT = 11) were identified and included in this review. The RCTs extracted in this study were not included in the meta-analysis.

Results: The meta-analysis showed that studies targeting people with alcohol and/or drug-use disorders (n = 11) had a small effect size (d = 0.24). However, the effect size was considered heterogeneous. Most of the reviewed RCTs assessed either drug use or abstinence as primary outcome using such methods as self-report and urine test, and showed that intervention groups exhibited greater improvement in the drug use condition than the control groups. The effect sizes (d) ranged from 0.19 to 0.54. One study revealed that a computerized intervention was more cost effective if it was added to treatment as usual. Various interventions were designed to use behavioral therapy approaches, e.g., cognitive behavioral therapy, motivational interviewing, as well as face-to-face interventions. Treatment retention, adverse events, relationship with therapists and engagement in the treatment were assessed as secondary outcomes. These outcomes were equivalent or more effective for the intervention groups compared with the control groups.

Conclusions: Computerized and Internet-based psychosocial interventions for drug users have a small to medium effect on the reduction of drug use but are highly cost effectiveness. These types of interventions can contribute to the improvement of treatment environments where treatment resources are very limited or where there is a stigma attached to drug users, as is often the case in Japan.