2. Results of the literature review and the Delphi expert consensus finding process on Methamphetamine Prevention Interventions

On specific objective of IMPRESA is to synthesize the latest evidence in order to select the most adequate evidence-based selective and indicated prevention strategies as well as harm reduction measures for different target groups of (potential) methamphetamine users.

A scientific review of the relevant literature published in peer reviewed journals as well as a mapping of national prevention activities already in place (in the five IMPRESA countries) was undertaken. Electronic databases (MEDLINE, PSYNDEX, EMBASE, etc.) were searched, using appropriate keywords and inclusion / exclusion criteria to identify eligible studies. An online questionnaire with short descriptions of the interventions identified in the literature review, their setting and target group served as the input for a Delphi expert consensus finding process.

N=1362 literature records were screened, selected, quality appraised and finally 20 relevant studies were extracted, synthesized and summarized. The country-specific mapping led to 27 eligible prevention/harm reduction measures. Both were combined in a list containing 47 good practice, evidence-based selective prevention strategies, indicated methamphetamine use/misuse interventions and harm reduction measures.

36 national and international (European) experts took part in a two-round Delphi process. After two rounds 41 out of 47 interventions/measures (87%) reached consensus. Conclusions The results represent a sound basis to serve as a source for the MSPs.