Outcome characteristics of studies investigating the association between the Met allele of the Val158Met polymorphism and violence.

Note: – = data not obtainable; n = sample size; Viol = violent; TAR = time at risk; SD = standard deviation; Mixed = both community and intra-institutional violence used as outcome; OAS4 = physical aggression checklist of the Overt Aggression Scale [63]; MOAS4 = physical aggression checklist of the Modified Overt Aggression Scale [64]; % Viol = base rate of violence. Total sample sizes and the number of participants with each genotype are not always equivalent to those that appear in published articles, as only individuals diagnosed with schizophrenia were included in the present review and outcome data could not always be obtained for all participants.