The Ghent Psychotherapy Study: A Pragmatic, Stratified, Randomized Parallel Trial into the Differential Efficacy of Psychodynamic and Cognitive-Behavioral Interventions in Dependent and Self-Critical Depressive Patients

INTRODUCTION

Different types of psychotherapy are effective for treating major depressive disorder across groups yet show large within-group differences. Patient personality style is considered a potentially useful variable for treatment matching.

OBJECTIVE

This study is the first experimental test of the interaction between therapeutic approach and patients' dependent versus self-critical personality styles.

METHODS

A pragmatic stratified parallel trial was carried out with 100 adult patients diagnosed with DSM-IV-TR major depressive disorder. They were randomly assigned to short-term (16-20 sessions) cognitive behavioral therapy (CBT) or short-term psychodynamic psychotherapy (STPP). Patients were assessed at baseline, during therapy, post-therapy, and at 3- and 6-month follow-up. Primary outcome is depression severity measured by the Hamilton Rating Scale for Depression posttreatment. Primary analysis was by intention to treat. This trial is registered with the ISRCTN registry (www.isrctn.com), number ISRCTN17130982.

RESULTS

The intention-to-treat sample consisted of 100 participants; 40 with self-critical and 60 with dependent personality styles were randomized to either CBT (n = 50) or STPP (n = 50). We observed no interaction effect (-0.34 [-6.14, 5.46]) between therapy and personality style and found no evidence for a difference in effectiveness between the treatments in general in terms of symptom reduction and maintained benefits at 6-month follow-up.

CONCLUSION

We found no evidence that dependent versus self-critical personality styles moderate the relation between treatment and outcome in depression. Research using individual patient data could gain further insight into why specific therapeutic approaches work better for specific patients.

Efficacy and moderators of short-term psychodynamic psychotherapy for depression: A systematic review and meta-analysis of individual participant data

BACKGROUND

Short-term psychodynamic psychotherapy (STPP) is frequently used to treat depression, but it is unclear which patients might benefit specifically. Individual participant data (IPD) meta-analyses can provide more precise effect estimates than conventional meta-analyses and identify patient-level moderators. This IPD meta-analysis examined the efficacy and moderators of STPP for depression compared to control conditions.

METHODS

PubMed, PsycInfo, Embase, and Cochrane Library were searched September 1st, 2022, to identify randomized trials comparing STPP to control conditions for adults with depression. IPD were requested and analyzed using mixed-effects models.

RESULTS

IPD were obtained from 11 of the 13 (84.6%) studies identified (n = 771/837, 92.1%; mean age = 40.8, SD = 13.3; 79.3% female). STPP resulted in significantly lower depressive symptom levels than control conditions at post-treatment (d = -0.62, 95%CI [-0.76, -0.47], p < .001). At post-treatment, STPP was more efficacious for participants with longer rather than shorter current depressive episode durations.

CONCLUSIONS

These results support the evidence base of STPP for depression and indicate episode duration as an effect modifier. This moderator finding, however, is observational and requires prospective validation in future large-scale trials.

Short-Term Psychodynamic Psychotherapy for Functional Somatic Disorders: A Meta-Analysis of Randomized Controlled Trials

INTRODUCTION

Functionalsomatic disorders (FSD) are common and costly, thereby driving the need for the development of effective brief treatment options. Short-term psychodynamic psychotherapy (STPP) is one candidate treatment method.

OBJECTIVE

To review and meta-analyze, where possible, randomized controlled trials (RCTs) of STPP for FSD.

METHODS

Following a systematic search of the literature, we performed a meta-analysis of available RCT groups to determine the effects of STPP on a range of outcomes after treatment, and medium- and long-term follow-ups.

RESULTS

In meta-analyses of 17 RCTs, STPP significantly outperformed minimal treatment, treatment as usual, or waiting list controls on somatic symptom measures at all time frames, with small to large magnitude effect sizes. Descriptive reviews of 5 RCTs suggest that STPP performed at least as well as other bona fide psychological therapies. Limitations of this meta-analysis include small samples of studies and possible publication bias.

CONCLUSIONS

STPP is a valid treatment option for diverse FSD conditions resulting in somatic symptom reductions that persist over time. STPP should be included in FSD treatment guidelines.

Short-term psychodynamic psychotherapy for functional somatic disorders: A systematic review and meta-analysis of within-treatment effects

OBJECTIVE

A recent meta-analysis of 17 randomized, controlled trials (RCTs) showed that Short-term Psychodynamic Psychotherapy (STPP) for functional somatic disorders (FSD) reduced somatic symptoms compared to wait list, minimal treatment, and treatment-as-usual controls. A clinically important yet unanswered question is how much improvement patients experience within STPP treatment.

METHODS

Following a systematic search, we identified STPP trials presenting data at baseline and post-treatment/follow-up. Meta-analyses determined the magnitude of changes in somatic symptoms and other outcomes from before to after STPP, and analyses examined effect sizes as a function of study, therapy, and patient variables.

RESULTS

We identified 37 trials (22 pre-post studies and 15 RCTs) totaling 2094 patients treated an average of 13.34 sessions for a range of FSD. Across all studies, somatic symptoms improved significantly from pre-treatment to short-term follow-up with a large effect size (SMD = -1.07), which was maintained at long-term follow-up (SMD = -0.90). After excluding two outlier studies, effects at short- and medium-term follow-up remained significant but were somewhat reduced in magnitude (e.g., short-term SMD = -0.73). Secondary outcomes including anxiety, depression, disability, and interpersonal problems had medium to large effects. Effects were larger for studies of STPP that were longer than 12 sessions or used an emotion-focused type of STPP, and for chronic pain or gastrointestinal conditions than for functional neurological disorders.

CONCLUSIONS

STPP results in moderate to large improvements in multiple outcome domains that are sustained in long-term follow-up. STPP is an effective treatment option for FSD and should be included in treatment guidelines.

Integrative therapy (short-term psychodynamic psychotherapy & cognitive-behavioral therapy) and cognitive-behavioral therapy in the treatment of generalized anxiety disorder: A randomized controlled trial

BACKGROUND

and purpose: Cognitive-behavioral therapy and psychodynamic psychotherapy are common psychotherapies used for mental disorders. The purpose of the present article was to achieve an integration of cognitive-behavioral therapy and short-term psychodynamic psychotherapy that enjoys simultaneously the effects of cognitive-behavioral therapies and the stability of short-term psychodynamic psychotherapies.

MATERIALS AND METHODS

It was a pre-test/post-test experimental study. Selected based on a purposive non-probabilistic sampling method, the sample studied here consisted of 36 people diagnosed with generalized anxiety according to Clinical Diagnostic Interview, psychiatrist diagnosis and Hamilton Rating Scale for Anxiety (HRSA). They were divided randomly into three 12 person groups: two treated groups by integrative therapy and cognitive-behavioral therapy, and one control group. Only pre-test and post-test were employed for the control group without any kind of treatment. To select patients and evaluate the effects of each type of treatments, the "Hamilton Rating Scale for Anxiety" and "Beck Depression Inventory" were applied for the pre-test/post-test and the differential diagnosis, respectively. The results obtained were analyzed by covariance and ANOVA analyses using SPSS software.

RESULTS

The results of the study indicate the efficacy of both cognitive-behavioral therapy and integrative therapy in the treatment of generalized anxiety and integrative therapy was more effective in the treatment of generalized anxiety compared to cognitive-behavioral therapy.

CONCLUSION

Integrative treatment not only to be effective in the treatment of generalized anxiety disorder and the reduction of its symptoms, but also to be more effective than cognitive-behavioral therapy.

Relational variables in short-term psychodynamic psychotherapy: an effectiveness study

This study examined associations between specific elements of therapeutic relationships and short-term psychodynamic psychotherapy (STPP) outcomes. Notably, we focused on therapists' subjective experiences during their first clinical interaction with patients, countertransference patterns and therapeutic alliance evaluated early in treatment, in relation to patient symptom changes at the end of STPP. Twenty clinicians completed the Comprehensive Psychopathological Rating Scale to evaluate patients' (N=32) symptom severity at the beginning and end of STPP. They also completed the Assessment of Clinicians' Subjective Experience (ACSE) to assess their subjective experiences of their patients at the first clinical interview and the Therapist Response Questionnaire (TRQ) and Working Alliance Inventory to evaluate their countertransference reactions and therapeutic alliance at the sixth therapy session. The findings showed that the TRQ and ACSE scales correlated in a coherent way, with the exception of the TRQ helpless/inadequate pattern and ACSE impotence. Strong and more negative TRQ countertransference patterns and ACSE dimensions were significantly associated with lower quality of the therapeutic alliance. Finally, better STPP outcomes were positively associated with a good therapeutic alliance and negatively correlated with greater difficulty in attunement at the beginning of clinical assessment and therapists' stronger responses of helplessness, frustration, and disengagement during therapy. These results confirm the precious value of the clinical relationship, which represents a useful source of information for therapists when planning therapeutic interventions.

The Ghent Psychotherapy Study (GPS) on the differential efficacy of supportive-expressive and cognitive behavioral interventions in dependent and self-critical depressive patients: study protocol for a randomized controlled trial

Background

Major depressive disorder is a leading cause of disease burden worldwide, indicating the importance of effective therapies. Outcome studies have shown overall efficacy of different types of psychotherapy across groups, yet large variability within groups. Although patient characteristics are considered crucial in understanding outcome, they have received limited research attention. This trial aims at investigating the interaction between therapeutic approach (pre-structured versus explorative) and the personality style of patients (dependent versus self-critical), which is considered a core underlying dimension of depressive pathology.

Methods/design

This study is a pragmatic stratified (dependent and self-critical patients) parallel trial with equal randomization (allocation 1:1) conducted in Flanders, Belgium. One hundred and four patients will be recruited and randomized to either 16–20 sessions of cognitive behavioral therapy for depression (pre-structured approach) or 16–20 sessions of short-term psychodynamic psychotherapy for depression (explorative approach) conducted by trained psychotherapists in private practices. The primary outcome is the severity of depression as measured by the Hamilton Rating Scale for Depression at completion of therapy. Secondary outcome measures include self-reported depressive and other symptoms, interpersonal functioning, idiosyncratic complaints, and the presence of the diagnosis of depression. Additional measures include biological measures, narrative material (sessions, interviews), and health care costs.

Discussion

This trial presents the test of an often-described, yet hardly investigated interaction between important personality dimensions and therapeutic approach in the treatment of depression. Results could inform therapists on how to match psychotherapeutic treatments to specific personality characteristics of their patients.

Trial registration

Isrctn.com, ISRCTN17130982. Registered on 2 February 2015.

Electronic supplementary material

The online version of this article (doi:10.1186/s13063-017-1867-x) contains supplementary material, which is available to authorized users.

The efficacy of short-term psychodynamic psychotherapy for depression: A meta-analysis update

OBJECTIVES

The efficacy of short-term psychodynamic psychotherapy (STPP) for depression is debated. Recently, a number of large-scale and high-quality studies have been conducted. We examined the efficacy of STPP by updating our 2010 meta-analysis.

RESULTS

After a thorough literature search, 54 studies (33 randomized clinical trials) totaling 3946 subjects were included. STPP was significantly more effective than control conditions at post-treatment on depression, general psychopathology and quality of life measures (d=0.49 to 0.69). STPP pre-treatment to post-treatment changes (d=0.57 to 1.18) indicated significant improvements on all outcome measures, which either significantly improved further (d=0.20 to 1.04) or were maintained from post-treatment to follow-up. No significant differences were found between individual STPP and other psychotherapies at post-treatment (d=-0.14) and follow-up (d=-0.06) in analyses that were adequately powered to detect a clinically relevant difference. STPP was significantly more efficacious than other psychotherapies on anxiety measures at both post-treatment (d=0.35) and follow-up (d=0.76).

CONCLUSION

We found clear indications that STPP is effective in the treatment of depression in adults. Although more high-quality studies are needed, particularly to assess the efficacy of STPP compared to control conditions at follow-up and to antidepressants, these findings add to the evidence-base of STPP for depression.