RT Article T1 Systematic Review of Mental Health Problems and Violent Extremism JF The journal of forensic psychiatry & psychology VO 32 IS 1 SP 51 OP 78 A1 Gill, Paul A2 Clemmow, Caitlin A2 Hetzel, Florian A2 Rottweiler, Bettina A2 Salman, Nadine A2 Vegt, Isabelle Van A2 Marchment, Zoe A2 Schumann, Sandy A2 Zolghadriha, Sanaz A2 Schulten, Norah A2 Taylor, Helen A2 Corner, Emily LA English YR 2021 UL https://krimdok.uni-tuebingen.de/Record/1747152897 AB This systematic review assesses the impact of mental health problems upon attitudes, intentions and behaviours in the context of radicalisation and terrorism. We identified 25 studies that measured rates of mental health problems across 28 samples. The prevalence rates are heterogenous and range from 0% to 57%. If we pool the results of those samples (n = 19) purely focused upon confirmed diagnoses where sample sizes are known (n = 1705 subjects), the results suggest arate of 14.4% with aconfirmed diagnosis. Where studies relied upon wholly, or in some form, upon privileged access to police or judicial data, diagnoses occurred 16.96% of the time (n = 283 subjects). Where studies were purely focused upon open sources (n = 1089 subjects), diagnoses were present 9.82% of the time. We then explore (a) the types and rates of mental health disorders identified (b) comparison/control group studies (c) studies that explore causal roles of mental health problems and (d) other complex needs. K1 Terrorism K1 complex needs K1 Systematic Review K1 Mental Health K1 Violent Extremism DO 10.1080/14789949.2020.1820067