the effectiveness of psychoeducational group intervention on post-traumatic growth: a randomized clinical trial

background: breast cancer is a chronic disease that leads to many psychological problems that are involved in treatment and adherence to treatment. the aim of this study was to evaluate the effect of psychoeducational group intervention on psychological factors that help the patients in the treatment process.methods: in this study, 80 patients were selected by using convenience sampling at imam khomeini hospital. they were randomly allocated either to the intervention group or to the control group. all participants completed the questionnaires of posttraumatic growth, quality of life, subjective wellbeing, adherence to treatment and social support. the results were analyzed by spss18 software using univariate and multivariate analysis.results: according to the results, the applied intervention had a significant effect on posttraumatic growth as a primary outcome, and also on subjective wellbeing and adherence to treatment as secondary outcomes. conclusion: psychoeducational group intervention in women with breast cancer can affect the treatment and provide better response to treatment through the improvement of posttraumatic growth, subjective wellbeing and adherence to treatment.