A comprehensive overview of randomized controlled trials of psychodynamic psychotherapies

Randomized Controlled Trials (RCTs) are currently considered ‘gold standard’ for evaluating psychosocial interventions, including psychodynamic psychotherapies (PDTs). The aim of this review is to summarize all available RCTs involving PDTs. A thorough search yielded 298 studies published between 1967 and 2022. The number of studies has increased over time with 123 (41.2%) published in the last 10 years. Most studies have been conducted in western countries, evaluating PDTs of brief duration (<40 sessions) for adults with mood (k = 67, 22.5%), psychosomatic (k = 38, 12.8%), anxiety (k = 35, 11.7%), or personality disorders (k = 29, 9.7%). The studies have utilized comparative (k = 233, 78.2%), additive (k = 33, 11.1%), parametric (k = 30, 10.1%) and dismantling designs (k = 2, 0.7%) and includes a total of 374 comparisons. Categorization of outcomes suggests that PDTs typically outperforms inactive controls, while comparisons with active treatments, inclugding Cognitive-Behavior Therapy (CBT), typically indicate no statistical difference. While the evidence-base for PDTs is growing, there are still major limitations and many research questions yet to be addressed. There is a pressing need for disseminating the existing research for PDTs to policy makers and the general public, as well as integrating findings in psychodynamic training curriculums.