| Summary: | We undertook an overview over systematic reviews in order to give The Norwegian Health Directorate better documentation for interventions to counter overserving, serving underage people and alcohol-related harm/injuries linked to drinking venues. We included five systematic reviews of high to moderate methodological quality. The included reviews assessed the effect of different types of training for servers and owners/managers, enforcement of alcohol laws, heightened police supervisions and various community interventions. All interventions were compared to no interventions. Based on our results and our assessment of the quality of the documentation for effects of the preventive interventions in the five included systematic reviews, we draw the following conclusions:1. Server training interventions probably make little or no difference to observed aggression exhibited by patrons, staff or self-reported server behaviour measured with behaviour index. The quality of the evidence has been assessed as moderate.2. Training for servers and owners/managers may make little or no difference to observed server behaviour measured with pseudo-drunk actors.3. Policy enforcement checks may make a little difference to observed server behaviour measured with alcohol sales to minor in the short term.4. Heightened police supervision with regard to serving underage and intoxicated people may make little or no difference to violence.5. Community interventions to counter overserving may slightly reduce police reported violence. These interventions may make little or no difference to underage purchase attempts, beer sales to underage and access to alcohol.6. The quality of the evidence has been assessed as low. For most of the other identified comparisons, we have assessed the quality of the evidence as very low
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