Publications by authors named "Kathleen Thomaes"

(1) Background: Ethnic minorities exhibit a higher prevalence of post-traumatic stress disorder (PTSD), while results for problematic substance use among ethnic groups remain mixed. PTSD and problematic substance use often co-occur; however, the impact of ethnicity on this association has not yet been investigated. (2) Methods: Self-report data on problematic alcohol/cannabis use (AUDIT/CUDIT) and presence of severe PTSD symptoms (PSS-SR) of = 22,841 participants of Dutch ( = 4610), South-Asian Surinamese ( = 3306), African Surinamese ( = 4349), Ghanaian ( = 2389), Turkish ( = 3947), and Moroccan ( = 4240) origin were available from the HELIUS study.

View Article and Find Full Text PDF
Article Synopsis
  • A study investigated whether adding group schema therapy (GST) to individual trauma-focused treatment (imagery rescripting, ImRs) improves outcomes for patients with PTSD and cluster C personality disorders (PD).* -
  • 130 adult outpatients were randomly assigned to receive either ImRs alone or ImRs plus GST, with results measured one year later to assess PTSD severity and other secondary outcomes.* -
  • Both treatment groups showed significant reductions in PTSD severity, but there was no notable difference between the two, suggesting that standard trauma-focused treatment may be the better first-line option for these patients.*
View Article and Find Full Text PDF

Introduction: High dropout and low treatment attendance rates among patients with posttraumatic stress disorder (PTSD) and personality disorders (PDs) continue to pose a significant challenge. Despite numerous studies focusing on enhancing treatment attendance, the identification of consistent and reliable predictors in patients with PTSD and comorbid PDs remains limited.

Objectives: This study aims to investigate a wide range of potential predictors of treatment attendance, encompassing demographic, patient-severity, treatment, and therapist-related variables in patients with PTSD and comorbid borderline and/or cluster C PDs.

View Article and Find Full Text PDF

Comorbidity between posttraumatic stress disorder (PTSD) and borderline personality disorder (BPD) is surrounded by diagnostic controversy and although various effective treatments exist, dropout and nonresponse are high. By estimating the network structure of comorbid PTSD and BPD symptoms, the current study illustrates how the network perspective offers tools to tackle these challenges. The sample comprised of 154 patients with a PTSD diagnosis and BPD symptoms, assessed by clinician-administered interviews.

View Article and Find Full Text PDF

Introduction: Although comorbidity of post-traumatic stress disorder (PTSD) with borderline personality disorder (BPD) and/or cluster C personality disorders (CPD) is common, neural correlates of this comorbidity are unknown.

Methods: We acquired functional MRI scans during an emotional face task in participants with PTSD + CPD (n = 34), PTSD + BPD (n = 24), PTSD + BPD + CPD (n = 18) and controls (n = 30). We used ANCOVAs and Bayesian analyses on specific ROIs in a fearful vs.

View Article and Find Full Text PDF

Objective: To test the hypothesis that self-rated personality disorder (PD) symptoms are a significant and clinically relevant predictor of treatment outcomes in a naturalistic treatment setting specialized in trauma-focused treatment using a single-group pretest-posttest design.

Method: Treatment-seeking patients reporting clinical levels of posttraumatic stress disorder (PTSD) symptoms filled out questionnaires at intake and after treatment. The primary outcome was change in PTSD severity after treatment, measured by the PTSD Checklist for DSM-5 (PCL-5).

View Article and Find Full Text PDF

Background: The impact of post-traumatic stress disorder (PTSD) on parenting and the parent-child relationship has been well-documented in the scientific literature. However, some conceptual and methodological challenges within this research field remain.

Procedure: We reflect on a number of challenges that we identified while examining the literature in preparation of an individual participant data meta-analysis on the relationships between PTSD and parenting.

View Article and Find Full Text PDF

Objective: Dual-tasking studies show that emotionality and vividness of aversive memory decrease by engaging in a working memory task and simultaneous recall of that memory. Adding positive valence to a dual task might be a promising innovation in the amelioration of lab-induced memory. However, studies aiming to translate these findings into autobiographical memory of a posttraumatic stress disorder (PTSD) population find conflicting results or show methodological flaws.

View Article and Find Full Text PDF

Background: Children of parents with post-traumatic stress disorder (PTSD) are at increased risk of adverse psychological outcomes. An important risk mechanism is impaired parental functioning, including negative parenting behavior, perceived incompetence, and lack of social support. Several parenting interventions for trauma-exposed parents and parents with psychiatric disorders exist, but none have specifically targeted parents with PTSD.

View Article and Find Full Text PDF

Background: Child maltreatment is a common negative experience and has potential long-lasting adverse consequences for mental and physical health, including increased risk for major depressive disorder (MDD) and metabolic syndrome. In addition, child maltreatment may increase the risk for comorbid physical health conditions to psychiatric conditions, with inflammation as an important mediator linking child maltreatment to poor adult health. However, it remains unresolved whether experiencing child maltreatment increases the risk for the development of comorbid metabolic syndrome to MDD.

View Article and Find Full Text PDF

Background: Trauma-focused treatments for posttraumatic stress disorder (PTSD) are commonly delivered either once or twice a week. Initial evidence suggests that session frequency affects treatment response, but very few trials have investigated the effect of session frequency. The present study's aim is to compare treatment outcomes of twice-weekly versus once-weekly sessions of two treatments for PTSD related to childhood trauma, imagery rescripting (ImRs) and eye movement desensitization and reprocessing (EMDR).

View Article and Find Full Text PDF

: Although personality disorders are common in PTSD patients, it remains unclear to what extent this comorbidity affects PTSD treatment outcome. : This constitutes the first meta-analysis investigating whether patients with and without comorbid personality disorders can equally benefit from psychotherapy for PTSD. : A systematic literature search was conducted in PubMed, EMBASE, PsychINFO and Cochrane databases from inception through 31 January 2020, to identify clinical trials examining psychotherapies for PTSD in PTSD patients with and without comorbid personality disorders (PROSPERO reference CRD42020156472).

View Article and Find Full Text PDF

Background: Neural alterations related to treatment outcome in patients with both post-traumatic stress disorder (PTSD) and comorbid personality disorder are unknown. Here we describe the protocol for a neuroimaging study of treatment of patients with PTSD and comorbid borderline (BPD) or cluster C (CPD) personality disorder traits. Our specific aims are to 1) investigate treatment-induced neural alterations, 2) predict treatment outcome using structural and functional magnetic resonance imaging (MRI) and 3) study neural alterations associated with BPD and CPD in PTSD patients.

View Article and Find Full Text PDF

Posttraumatic stress disorder (PTSD) is a serious and relatively common mental disorder causing a high burden of suffering. Whereas evidence-based treatments are available, dropout and non-response rates remain high. PTSD and Cluster C personality disorders (avoidant, dependent or obsessive-compulsive personality disorder; CPD) are highly comorbid and there is evidence for suboptimal treatment effects in this subgroup of patients.

View Article and Find Full Text PDF
Article Synopsis
  • This study focuses on the effectiveness and cost-efficiency of combining Eye Movement Desensitization and Reprocessing (EMDR) with Dialectical Behavior Therapy (DBT) for treating patients with both PTSD and Borderline Personality Disorder (BPD), compared to EMDR alone.
  • It will be conducted as a randomized controlled trial with 126 adult participants, measuring various neurobiological factors (like cortisol and protein levels) to understand how they influence an individual's response to treatment.
  • This research aims to identify which therapy is more effective for specific patients and establish better treatment protocols for those with the complex comorbidity of PTSD and BPD.
View Article and Find Full Text PDF

Attachment (mal)functioning and a history of childhood trauma (CT) are both considered psychological determinants of personality disorders (PDs). Their interaction, however, remains largely uninvestigated. In this study, the authors assessed adult and childhood attachment style in a sample of patients with diverse PDs ( = 75) and determined the relation with both occurrence and severity of CT.

View Article and Find Full Text PDF

Background: Many studies report smaller hippocampal and amygdala volumes in posttraumatic stress disorder (PTSD), but findings have not always been consistent. Here, we present the results of a large-scale neuroimaging consortium study on PTSD conducted by the Psychiatric Genomics Consortium (PGC)-Enhancing Neuroimaging Genetics through Meta-Analysis (ENIGMA) PTSD Working Group.

Methods: We analyzed neuroimaging and clinical data from 1868 subjects (794 PTSD patients) contributed by 16 cohorts, representing the largest neuroimaging study of PTSD to date.

View Article and Find Full Text PDF

Background: Eye movement desensitization and reprocessing (EMDR) is an effective treatment for posttraumatic stress disorder (PTSD). During EMDR, the patient recalls traumatic memories while making eye movements (EMs). Making EMs during recall is associated with decreased vividness and emotionality of traumatic memories, but the underlying mechanism has been unclear.

View Article and Find Full Text PDF

Background: Although numerous studies have investigated the neurobiology and neuroendocrinology of posttraumatic stress disorder (PTSD) after single finished trauma, studies on PTSD under ongoing threat are scarce and it is still unclear whether these individuals present similar abnormalities.

Objective: The purpose of this review is to present the neurobiological and neuroendocrine findings on PTSD under ongoing threat. Ongoing threat considerably affects PTSD severity and treatment response and thus disentangling its neurobiological and neuroendocrine differences from PTSD after finished trauma could provide useful information for treatment.

View Article and Find Full Text PDF

Traumatic stress can have severe consequences for both mental and physical health. Furthermore, both psychological and biological traces of trauma increase as a function of accumulating traumatic experiences. Neurobiological research may aid in limiting the impact of traumatic stress, by leading to advances in preventive and treatment interventions.

View Article and Find Full Text PDF

Introduction: Effective first-line treatments for posttraumatic stress disorder (PTSD) are well established, but their generalizability to child abuse (CA)-related Complex PTSD is largely unknown.

Method: A quantitative review of the literature was performed, identifying seven studies, with treatments specifically targeting CA-related PTSD or Complex PTSD, which were meta-analyzed, including variables such as effect size, drop-out, recovery, and improvement rates.

Results: Only six studies with one or more cognitive behavior therapy (CBT) treatment conditions and one with a present centered therapy condition could be meta-analyzed.

View Article and Find Full Text PDF