Group Intervention for Interpersonal Skills

Not Applicable

Recruiting

• Conditions: Anxiety Disorder; Depressive Disorder
• Interventions: Behavioral: Kiesler Circle Training (KCT); Behavioral: Cognitive Behavioral Therapy (CBT)

• Registration Number: NCT06170801
• Lead Sponsor: Charite University, Berlin, Germany

Brief Summary

The purpose of this study is to compare an individual state-of-the-art cognitive behavioral therapy (CBT) with CBT augmented by a group intervention for improving interpersonal skills, the Kiesler Circle Training (CBT+KCT), in patients with a depressive or anxiety disorder.

Detailed Description

This study aims to test the effectiveness and feasibility of a transdiagnostic group psychotherapy to improve interpersonal skills, the Kiesler Circle Training (KCT). For this purpose, a prospective, bicentre, randomised clinical trial (RCT) blinded by evaluators and statisticians will be conducted on outpatients with diagnoses of anxiety and/or depressive disorders according to DSM-5. An individual state-of-the-art cognitive behavioral therapy (CBT) will be compared with CBT augmented by Kiesler Circle Training (CBT + KCT) in a sample of 156 patients (CBT: 78 patients, CBT + KCT: 78 patients). All participants will be assessed four times, at baseline (T1, week 2), at mid-treatment (T2, week 9), at post-treatment (T3, week 14) and at 3-months follow-up (T4, week 26). Outcome measurements include interpersonal problems as well as symptom change in regard to both the categorical approach (primary diagnosis) and the transdiagnostic approach. The two main hypotheses are:

1. the improvement of interpersonal problems in the experimental group (CBT + KCT) will be greater than the improvement in the control group (CBT).

2. the improvement of interpersonal problems will be associated with decreasing symptom severity related to the primary diagnosis, so that patients in the conjoint CBT+KCT treatment will reach higher symptom change scores than patients in the CBT only condition.

Furthermore, we assume that the course of interpersonal problems is moderated by childhood maltreatment and mediated by the quality and quantity of daily social contacts.

Study Timeline

• Study First Submitted: 2023-12-04
• Study First Submitted QC: 2023-12-12
• Study First Posted: 2023-12-14
• Study Start: 2024-07-03
• Status Verified: 2024-08
• Last Update Submitted: 2024-08-05
• Last Update Posted: 2024-08-06
• Primary Completion: 2026-07
• Study Completion: 2026-10

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 156

Inclusion Criteria

• Sufficient knowledge of the German language (B2 level)
• Primary diagnosis of either depressive disorder or anxiety disorder according to DSM-5 at time of screening
• Interpersonal distress above average (IIP-32 > 1.81) at time of screening
• Ongoing individual CBT at time of screening
• Signed informed consent regarding the study protocol

Exclusion Criteria

• Acute suicidality at time of screening
• Active substance abuse at time of screening
• Borderline, antisocial, schizoid or schizotypic personality disorder at time of screening
• Inability to participate in outpatient treatment with additional weekly group appointment at time of screening
• Any kind of additional group treatment (including self-help groups) besides individual CBT during the entire study period

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Kiesler Circle Training (KCT) + Cognitive Behavioral Therapy (CBT)	Kiesler Circle Training (KCT)	The Kiesler Circle Training (KCT) consists of 12 weekly group sessions of 100 minutes each (in a group of max. 10 patients). In addition, all patients receive weekly individual state-of-the-art CBT sessions (50 minutes each).
Kiesler Circle Training (KCT) + Cognitive Behavioral Therapy (CBT)	Cognitive Behavioral Therapy (CBT)	The Kiesler Circle Training (KCT) consists of 12 weekly group sessions of 100 minutes each (in a group of max. 10 patients). In addition, all patients receive weekly individual state-of-the-art CBT sessions (50 minutes each).
Cognitive Behavioral Therapy (CBT)	Cognitive Behavioral Therapy (CBT)	The patients receive weekly individual state-of-the-art CBT sessions (50 minutes each).

Primary Outcome Measures

Name	Time	Method
Inventory for Interpersonal Problems (IIP-32; Horowitz et al., 1988, German: Thomas et al., 2011)	Weeks 1, 14	Change in interpersonal functioning, measured with the IIP-32 from baseline (Time 1) to week 14 (Time 2), represents the primary outcome measure. The IIP-32 is a self-assessment questionnaire for interpersonal problems, i.e., difficulties in interacting with other individuals, based on Horowitz's Circumplex Model. It consists of 32 items that are answered on a 5-point scale (0= not at all, 4 = very much). For evaluation, a mean score is calculated across all items, with a higher score indicating a higher severity of interpersonal problems.

Secondary Outcome Measures

Name	Time	Method
Impact Message Inventory, revised version (IMI-R; Kiesler et al., 2006; German: Caspar et al., 2016)	Weeks 1, 14, 26	As key secondary endpoint, observer-rated changes in interpersonal functioning from Time 1 (week 1) to Time 2 (week 14) will be investigated with the IMI-R. The IMI-R will be conducted by blinded study raters. The IMI-R uses 64 items (8 items for each Kiesler Circle position) to capture covert reactions that a patient evokes in a blinded-rater. Through this assessment, it is possible to create an individual Kiesler Circle profile for each patient. The assessment of each behavior is conducted on a 4-point scale (1 = strongly disagree; 4 = strongly agree), so that higher values mean a higher expression of the Kiesler Circle position.
Beck Depression Inventory, simplified (BDI-V; Beck, 1961; German version: Schmitt et al., 2000)	Weeks 1, 9, 14, 26	The BDI-V is a self-report questionnaire designed to assess the severity of depressive symptoms. Patients rate the severity of 20 depression symptoms on a 6-point scale (0 = never, 5 = almost always). The total score ranges from 0 to 100, with higher scores indicating a higher severity of depression.
Inventory for Interpersonal Problems (IIP-32; Horowitz et al., 1988, German: Thomas et al., 2011)	Baseline, Weeks 1, 9, 14, 26	The IIP-32 is a self-assessment questionnaire for interpersonal problems, i.e., difficulties in interacting with other individuals, based on Horowitz's Circumplex Model. It consists of 32 items that are answered on a 5-point scale (0= not at all, 4 = very much). For evaluation, a mean score is calculated across all items, with a higher score indicating a higher severity of interpersonal problems.
Hamilton Depression Rating Scale, 24 items version (HAM-D, Hamilton, 1967)	Weeks 1, 9, 14, 26	The HAMD is a semi-structured interview, which measures the severity of depressive symptoms experienced in the last week. Blinded study raters will assess the severity of symptoms for each of the 24 items using a scale ranging from 0-2, 0-3, or 0-4. The total score ranges from 0-75, with higher scores indicating a higher severity of depression.
Questionnaire on panic-related Anxieties, Cognitions and Avoidance (ACA; Chambless et al., 1984; German: Ehlers et al., 2001)	Weeks 1, 9, 14, 26	The ACA is a self-report questionnaire of which we assess two subdomains in our study: the Body Sensations Questionnaire (BSQ) and the Agoraphobic Cognitions Questionnaire (ACQ). The BSQ asks about anxiety regarding 17 physical symptoms and the ACQ about 14 catastrophizing thoughts that can occur during anxiety. Answers are given on a 5-point scale, with higher scores indicating higher levels of anxiety (1 = not anxious/never, 5 = extremely anxious/always). A mean value is calculated for each of the two subdomains.
Hamilton Anxiety Rating Scale (HAM-A; Hamilton, 1959)	Weeks 1, 9, 14, 26	The HAM-A is a clinician-rating to assess the severity of anxiety symptoms experienced in the last week. Blinded raters will assess the severity of symptoms for each of 14 items using a 5-point scale ranging from 0 to 4. The total score ranges from 0 to 56, with higher scores indicating a higher severity of anxiety.
Short Emotional Disorder Inventory (SEDI; adopted short version of the MEDI by Kaiser et al., unsubmitted)	Weeks 1, 14, 26	The SEDI is a short form of the Multidimensional Emotional Disorder Inventory (MEDI; Rosellini \& Brown, 2019), which represents a dimensional approach to classify emotional disorders. The SEDI is a self-report questionnaire comprising 15 items that are answered on a 4-point scale (1 = completely untrue or slightly true, 4 = completely true). A mean value is calculated over all items, with higher values indicating a higher level of emotional disorder traits.
Generalized Anxiety Disorder 7 (GAD-7; Spitzer et al., 2006)	Weeks 1, 14, 26	The GAD-7 was integrated into the patient health questionnaire in 2006 as a validated scale for measuring generalized anxiety disorder using 7 items. The rating scale is 4-point (0 = never, 3 = almost daily) and a total score ranging from 0-21 is calculated.
World Health Organization Quality of Life (WHOQoL-BREF; The WHOQOL Group, 1998)	Weeks 1, 14, 26	The WHOQoL-BREF is a self-report measure and assesses the subjective quality of life across physical, psychological, social, and environmental domains using 26 items. These domains are rated by patients on a 5-point scale and a mean score for each domain is calculated by multiplying the mean value of all items of the respective domain by four. The possible values for all domain scores therefore range from 4-20.
Level of Personality Functioning Scale-Brief Form 2.0 (LPFS-BF; Spitzer et al., 2021)	Weeks 1, 14, 26	The LPFS-BF is a self-report questionnaire designed to assess personality functioning in alignment with the DSM-5 and ICD-11. The questionnaire comprises 12 items, which are answered on a 4-point scale (1 = completely untrue, 4 = completely true) and captures two personality functioning domains (self and interpersonal pathology). A mean value is calculated for each domain, with higher scores indicating higher expression of that personality functioning domain.
Patient Health Questionnaire-15 (PHQ-15; Kroenke et al., 2002)	Weeks 1, 14, 26	The PHQ-15 is part of the Patient Health Questionnaire and measures the 15 most common somatic symptoms of outpatients. The rating scale is 3-point (0 = not affected, 2 = severely affected) and a total score ranging from 0-30 is calculated.
Patient Health Questionnaire-9 (PHQ-9; Kroenke et al., 2001)	Weeks 1, 14, 26	The PHQ-9 is part of the Patient Health Questionnaire and measures depressive symptoms using 9 items. The rating scale is 4-point (0 = never, 3 = almost daily) and a total score ranging from 0-24 is calculated.
Interpersonal Needs Questionnaire (INQ; Forkmann, T. & Glaesmer, H., 2013)	Weeks 1, 14, 26	The Interpersonal Needs Questionnaire (INQ) measures interpersonal needs using two subscales: thwarted belongingness and perceived burdensomeness. The questionnaire consists of 15 items, that are answered on a 7-point scale (1 = completely untrue, 7 = completely true). After reversing the polarity of 6 items, a mean value is calculated for each of the two subscales, with higher scores indicating higher levels of thwarted belongingness and perceived burdensomeness.
Personality Inventory for DSM-5 Brief Form Plus (PID5BF+M; Bach et al., 2020)	Weeks 1, 14, 26	The PID5BF+M is a self-report questionnaire designed to assess maladaptive personality traits in alignment with the DSM-5 and ICD-11. The questionnaire comprises 36 items, which are answered on a 4-point scale (0 = completely untrue, 3 = completely true) and captures six personality trait domains (negative affectivity, detachment, antagonism/dissociality, disinhibition, anankastia, and psychoticism). A mean value is calculated for each domain, with higher scores indicating higher expression of that personality domain.

Trial Locations

Locations (1)

Charité; 🇩🇪 Berlin, Germany