A meta-analysis of existing research on the effectiveness of the type of treatment and suggesting the most effective treatment for prisoners with mental disorders

This study was performed to meta-analysis of available studies on the effectiveness of treatments and offer effective treatment for prisoners suffering from mental disorders. The research method was meta-analysis. The study population included all studies with experimental and quasi-experimental designs from 1991 to 2017 in 1124 cases was about the prisoners. 50 studies that had criteria for entering the meta-analysis were selected using a census method. Data collection was done through a researcher-made checklist. The calculation of effect size was done through index r by CMA2 software. the effect size index of all studies according random effects model was t r=0.603 and cognitive therapy with the effect size of r=0.669 was evaluated as the most effective treatment method. In general, the use of therapeutic methods for the treatment of mental disorders in prisoners is effective and the effect of the Cohen classification is high.