“…Due to the heterogeneity of outcome measures and populations sampled, a meta-analysis of these data was not feasible. Violence was defined by self-report in eight studies (supplemented by carer information in some) [4,21,24,34,38,39,45,54] and from medical records in three investigations [6,27,41]. In order to assess psychiatric comorbidity, four studies used standardized clinical interviews [6,38,39,45] and two examined medical records [27,41].…”