出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/18 08:57:34」(JST)
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Interpersonal psychotherapy (IPT) is a time-limited treatment that encourages the patient to regain control of mood and functioning typically lasting 12–16 weeks.[1] IPT is based on the principle that there is a relationship between the way people communicate and interact with others and their mental health.[2] Interpersonal Psychotherapy of Depression was developed in the New Haven-Boston Collaborative Depression Research Project by Gerald Klerman, MD, Myrna Weissman, PhD, and their colleagues for the treatment of ambulatory depressed, nonpsychotic, nonbipolar patients.[3]
Interpersonal therapy began in 1969 at Yale University, where Dr. Gerald Klerman was joined by Dr. Eugene Paykel from London to design a study to test the relative efficacy of an antidepressant alone and both with and without psychotherapy as maintenance treatment of ambulatory nonbipolar depression.[4]
IPT takes structure from contemporary Cognitive Behavioral Therapy (CBT) approaches in that it is time-limited and employs homework, structured interviews, and assessment tools.[5] Yet the content of therapy was inspired by Harry Stack Sullivan's psychodynamic Interpersonal Theory (Sullivan, 1953, Interpersonal Theory of Psychiatry). IPT focuses on a specific vulnerability to social stressors, such as differing role expectations in a dyadic relationship (Weissman, et al, 2007), but does not include a personality theory or attempt to conceptualize or treat personality (Prochaska, 1984, Systems of Psychotherapy: A Transtheoretical Analysis). This makes IPT quite distinct from its psychodynamic influence, which is fundamentally a personality theory. However, other theorists have developed contemporary Interpersonal psychotherapies that remain true to the psychodynamic origin. For example Benjamin's Interpersonal Reconstructive Therapy (2006, Interpersonal Reconstructive Therapy: An Integrative, Personality-Based Treatment for Complex Cases), allows for diffuse interventions from any range of orientations as long as they comply with the Structural Analysis of Social Behavior Interpersonal Personality conceptualization, blocks reinforcement of maladaptive & regressive behaviors and teaches more adaptive ways of being.
Over the past 20 years, IPT has been carefully studied in many research protocols, has been demonstrated to successfully treat patients with depression, and has been modified to treat other psychiatric disorders (substance abuse, dysthymia, bulimia) and patient populations (adolescents, late-life, primary medical care). It has primarily been utilized as a short-term (approximately 16 week) therapy, but has also been modified for use as a maintenance therapy for patients with recurrent depression.[3]
From the beginning, IPT has been tested in various clinical trials [6] and found to be effective in treating acute episodes of depression and preventing or delaying the onset of subsequent episodes. A large multicenter collaborative study was conducted by the National Institute of Mental Health (NIMH), comparing IPT, CBT, imipramine and placebo. Results of the Collaborative Study were published in 1989,[7] demonstrating that IPT was quite effective in treating acute symptoms of depression during the first 6–8 weeks, with improvement in psychosocial function continuing after 16 weeks. Frank and her colleagues in Pittsburgh have demonstrated the efficacy of IPT as a maintenance treatment and have delineated some contributing factors.
Interpersonal psychotherapy has been proven as an effective treatment for the following:
Although originally developed as an individual therapy for adults, IPT has been modified for use with adolescents and older adults.[8]
IPT for children is based on the premise that depression occurs in the context of an individual's relationships regardless of its origins in biology or genetics. More specifically, depression affects people's relationships and these relationships further affect our mood. The IPT model identifies four general areas in which a person may be having relationship difficulties: 1) grief after the loss of a loved one; 2) conflict in significant relationships; 3) difficulties adapting to changes in relationships or life circumstances; and 4) difficulties stemming from social isolation.[11] The IPT therapist helps identify areas in need of skill-building to improve the client's relationships and decrease the depressive symptoms. Over time, the client learns to link changes in mood to events occurring in his/her relationships, communicate feelings and expectations for the relationships, and problem-solve solutions to difficulties in the relationships.[12]
IPT has been adapted for the treatment of depressed adolescents (IPT-A) to address developmental issues most common to teenagers such as separation from parents, development of romantic relationships, and initial experience with death of a relative or friend [12] IPT-A helps the adolescent identify and develop more adaptive methods for dealing with the interpersonal issues associated with the onset or maintenance of their depression. IPT-A is typically a 12-16 week treatment. Although the treatment involves primarily individual sessions with the teenager, parents are asked to participate in a few sessions to receive education about depression, to address any relationship difficulties that may be occurring between the adolescent and his/her parents, and to help support the adolescent's treatment.[13]
IPT has been used as a psychotherapy for depressed elderly, with its emphasis on addressing interpersonally relevant problems. IPT appears especially well suited to the life changes that many people experience in their later years[14]
IPT is particularly accessible to patients who find dynamic approaches mystifying, or the ‘homework’ demands of Cognitive Behavioral Therapy (CBT) daunting. IPT has been specially modified for adolescents [15] who may find CBT too much like school work, whereas IPT addresses relationships — a primary concern. IPT is abstemious in its use of technical jargon — a bonus for those who distrust ‘ psychobabble’. C.G. Fairburn, in a 1997 study, reported that both patients and therapists in his bulimia studies expressed a preference for IPT over CBT.[16] This may have implications for compliance and therapist morale.
For general psychiatrists, a perceived limitation of IPT is it has not yet been modified for the management of psychoses ( although this limitation is true of many prominent psychotherapies). The CBT model requires such expertise for its use with this population that it would be considered risky for a trainee to attempt its use without expert training and support.[17]
As with any face-to-face therapy, it is demanding of the individual in that effort must be made to attend pre-arranged dates for the therapy sessions. Whereas substantive effort may not be needed for 'homework' tasks, the therapy involves the reenactment of past negative feelings which, as well as creating a danger of emotional harm, often requires more effort than that required in CBT sessions.
Studies, such as the one conducted by Paley et al. (2008), have found little difference in the efficacy of CBT and IPT. A 1990 meta-analysis found that CBT was superior to a no-treatment control group; however, when compared to a placebo control group, there was no significant difference. If CBT and placebo therapies have similar effectiveness, and CBT and IPT have similar effectiveness, it is rational to presume that IPT and placebo therapies have similar effectiveness.[18] Another 1996 study concluded after his experiment that both IPT and CBT showed a tendency for symptoms to recur, thus limiting the long term-effectiveness of these psychological therapies.[19]
Any study showing the success of such therapies often fail to take into account poor attrition rates, which are very common among psychological therapies, as many patients drop out because they feel the therapy isn't working. Thus when an average is taken of the success of the therapy which includes the patients that dropped out, the therapy appears to be less effective than it actually is. If patients remain to complete the therapy, they are more likely to be benefit from it.[20]
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| リンク元 | 「対人関係療法」「ITP」「IPT」 |