Background: Post-traumatic growth refers to positive changes that occur after a traumatic event, and these changes can be influenced by an individual's personality traits. Objectives: The present study aims to predict post-traumatic growth based on the five major personality traits in those who recovered from COVID-19. Methods: This study used a descriptive correlational approach. The statistical population consisted of recovered people from COVID-19 in Ilam in 2021, and 200 people were selected using the convenience sampling method. The research tools included the five major personality traits questionnaire (NEO-FFI) and the Post-Traumatic Growth Inventory (PTGI). Data were analyzed by Pearson correlation and stepwise regression analysis using SPSS-26. Results: The findings revealed a significant relationship between the five major personality traits and post-traumatic growth. Accordingly, there was a significant negative relationship between neuroticism and post-traumatic growth and its subscales. Additionally, a significant positive relationship was found between extroversion, openness, agreeableness, and conscientiousness with the total score of post-traumatic growth and its subscales. Stepwise regression analysis showed that the five major personality traits significantly explain the post-traumatic growth rate (F = 73.644). Conclusions: Providing medical and psychosocial interventions and training can stimulate psychological adjustment, improve mental health, and ultimately prevent the complications of mental problems caused by the pandemic. According to the results of the present research, it is suggested to pay attention to PTG components and personality traits as a model to reduce the severity of mental complications when working with patients who have recovered from COVID-19.
