Ravitz, P., Watson, P., Lawson, A., Constantino, M.J., Bernecker, S., Park, J., & Swartz, H.A. (2019). Interpersonal Psychotherapy: A scoping review and historical perspective (1974-2017). Harvard Review of Psychiatry, 27, 165-179.
Interpersonal Psychotherapy (IPT) focuses on relationships and emotions, and emphasizes stressful interpersonal loss, life changes, relationship disputes, and social isolation as the causes and maintenance factors related to depression and other disorders. The IPT is predicated on the importance of relationships for survival and the bidirectional links between depression and problems with relationships and social support. IPT was first manualized in 1974 and used as a comparison condition in studies of pharmacotherapy for depression. Contrary to expectations, IPT did just as well as antidepressant medication in early treatment trials, thus giving rise to an important new psychological treatment. This scoping review by Ravitz and colleagues summarizes the development of IPT over the past 40 years. The review identified over 1000 articles of IPT, 133 of which were randomized controlled trials. Following the initial trials in the 1970s, IPT was included in the Treatment of Depression Collaborative Research Program in the 1980s, funded by the National Institute of Mental Health in the United States. This was the largest trial of its kind whose results indicated that patients with high baseline depression did best with medications followed by IPT, whereas CBT did not show significant advantage over the placebo condition. The 1990s to the mid-2000s saw a precipitous increase in randomized controlled trials of IPT in which IPT was: compared to other therapies, compared to medications, and/or provided in combination with medications. In addition, treatment trials of group IPT were conducted in low- and middle-income countries. These studies led the World Health Organization to publish and disseminate a group IPT manual. More recent research in the past decade has seen IPT offered in different formats (individual, telephone, group, internet), for different populations (adolescents, perinatal women, late-life), and in a variety of low- and high-income countries. Currently, there is good research support for the efficacy of IPT for depression, eating disorders, bipolar disorder, PTSD, and anxiety.
Relationships play an important role in determining health, disease, vulnerability, recovery, and resilience. Because of the universal importance of relationships, IPT is relevant to mental health care across cultures and populations. Therapists should consider the importance of relationship loss and grief, role transitions throughout the lifespan, persistent conflicts in relationships, and social isolation when treating patients with depression and other mental disorders.