RESUMO
BACKGROUND: It has been increasingly recognized that some people experience post-traumatic growth (PTG) as a result of struggling with cancer. OBJECTIVE: This systematic review aims to identify psychosocial interventions that might facilitate PTG in adults with cancer. METHODS: A search was conducted in PsycINFO, PubMed, Scopus, the Cochrane Library, and ProQuest up to 16 September 2022. The PRISMA guidelines were followed; all included interventional studies had to comprise 30 or more adults with cancer, using the Posttraumatic Growth Inventory, from 1994 forward. RESULTS: A total of 2731 articles were retrieved, 1028 of those were screened and 37 unique trials were included (46 articles). A large number of studies were published since 2018 (52.4%), were randomized controlled trials (43.2%), and had group interventions (34.8%), including mainly female participants (83.8%) with a single cancer type (54.1%). Most interventions (75.7%) were moderately to highly effective in increasing PTG (d = 0.65, 95% CI 0.39-0.91) with the most effective interventions using Cognitive Behavioral Therapy (d = 1.24, 95% CI: 0.05-2.44), Mindfulness-based (d = 0.54, 95% CI = 0.14-0.94) and Education, Peer Support and Health Coaching interventions (d = 0.28, 95% CI: 0.1-0.46). Expression-based and Positive Psychology-based approaches also showed promising results. Notably, the majority of studies had a high risk of bias. CONCLUSIONS: PTG facilitation is a promising field that should be pursued as it not only allows people with cancer to overcome their trauma but also results in them going over and above their pre-cancer state, enhancing resilience, health, and well-being.