53 results on '"Cwik JC"'
Search Results
2. Resting-state functional connectivity in anxiety disorders: a multicenter fMRI study.
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Langhammer T, Hilbert K, Adolph D, Arolt V, Bischoff S, Böhnlein J, Cwik JC, Dannlowski U, Deckert J, Domschke K, Evens R, Fydrich T, Gathmann B, Hamm AO, Heinig I, Herrmann MJ, Hollandt M, Junghoefer M, Kircher T, Koelkebeck K, Leehr EJ, Lotze M, Margraf J, Mumm JLM, Pittig A, Plag J, Richter J, Roesmann K, Ridderbusch IC, Schneider S, Schwarzmeier H, Seeger F, Siminski N, Straube T, Ströhle A, Szeska C, Wittchen HU, Wroblewski A, Yang Y, Straube B, and Lueken U
- Abstract
Anxiety disorders (AD) are associated with altered connectivity in large-scale intrinsic brain networks. It remains uncertain how much these signatures overlap across different phenotypes due to a lack of well-powered cross-disorder comparisons. We used resting-state functional magnetic resonance imaging (rsfMRI) to investigate differences in functional connectivity (FC) in a cross-disorder sample of AD patients and healthy controls (HC). Before treatment, 439 patients from two German multicenter clinical trials at eight different sites fulfilling a primary diagnosis of panic disorder and/or agoraphobia (PD/AG, N = 154), social anxiety disorder (SAD, N = 95), or specific phobia (SP, N = 190) and 105 HC underwent an 8 min rsfMRI assessment. We performed categorical and dimensional regions of interest (ROI)-to-ROI analyses focusing on connectivity between regions of the defensive system and prefrontal regulation areas. AD patients showed increased connectivity between the insula and the thalamus compared to controls. This was mainly driven by PD/AG patients who showed increased (insula/hippocampus/amygdala-thalamus) and decreased (dorsomedial prefrontal cortex/periaqueductal gray-anterior cingulate cortex) positive connectivity between subcortical and cortical areas. In contrast, SAD patients showed decreased negative connectivity exclusively in cortical areas (insula-orbitofrontal cortex), whereas no differences were found in SP patients. State anxiety associated with the scanner environment did not explain the FC between these regions. Only PD/AG patients showed pronounced connectivity changes along a widespread subcortical-cortical network, including the midbrain. Dimensional analyses yielded no significant results. The results highlighting categorical differences between ADs at a systems neuroscience level are discussed within the context of personalized neuroscience-informed treatments. PROTECT-AD's registration at NIMH Protocol Registration System: 01EE1402A and German Register of Clinical Studies: DRKS00008743. SpiderVR's registration at ClinicalTrials.gov: NCT03208400., (© 2024. The Author(s).)
- Published
- 2024
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3. Lack of evidence for predictive utility from resting state fMRI data for individual exposure-based cognitive behavioral therapy outcomes: A machine learning study in two large multi-site samples in anxiety disorders.
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Hilbert K, Böhnlein J, Meinke C, Chavanne AV, Langhammer T, Stumpe L, Winter N, Leenings R, Adolph D, Arolt V, Bischoff S, Cwik JC, Deckert J, Domschke K, Fydrich T, Gathmann B, Hamm AO, Heinig I, Herrmann MJ, Hollandt M, Hoyer J, Junghöfer M, Kircher T, Koelkebeck K, Lotze M, Margraf J, Mumm JLM, Neudeck P, Pauli P, Pittig A, Plag J, Richter J, Ridderbusch IC, Rief W, Schneider S, Schwarzmeier H, Seeger FR, Siminski N, Straube B, Straube T, Ströhle A, Wittchen HU, Wroblewski A, Yang Y, Roesmann K, Leehr EJ, Dannlowski U, and Lueken U
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- Humans, Female, Male, Adult, Middle Aged, Treatment Outcome, Brain diagnostic imaging, Brain physiopathology, Young Adult, Implosive Therapy methods, Magnetic Resonance Imaging methods, Machine Learning, Anxiety Disorders therapy, Anxiety Disorders diagnostic imaging, Anxiety Disorders physiopathology, Cognitive Behavioral Therapy methods
- Abstract
Data-based predictions of individual Cognitive Behavioral Therapy (CBT) treatment response are a fundamental step towards precision medicine. Past studies demonstrated only moderate prediction accuracy (i.e. ability to discriminate between responders and non-responders of a given treatment) when using clinical routine data such as demographic and questionnaire data, while neuroimaging data achieved superior prediction accuracy. However, these studies may be considerably biased due to very limited sample sizes and bias-prone methodology. Adequately powered and cross-validated samples are a prerequisite to evaluate predictive performance and to identify the most promising predictors. We therefore analyzed resting state functional magnet resonance imaging (rs-fMRI) data from two large clinical trials to test whether functional neuroimaging data continues to provide good prediction accuracy in much larger samples. Data came from two distinct German multicenter studies on exposure-based CBT for anxiety disorders, the Protect-AD and SpiderVR studies. We separately and independently preprocessed baseline rs-fMRI data from n = 220 patients (Protect-AD) and n = 190 patients (SpiderVR) and extracted a variety of features, including ROI-to-ROI and edge-functional connectivity, sliding-windows, and graph measures. Including these features in sophisticated machine learning pipelines, we found that predictions of individual outcomes never significantly differed from chance level, even when conducting a range of exploratory post-hoc analyses. Moreover, resting state data never provided prediction accuracy beyond the sociodemographic and clinical data. The analyses were independent of each other in terms of selecting methods to process resting state data for prediction input as well as in the used parameters of the machine learning pipelines, corroborating the external validity of the results. These similar findings in two independent studies, analyzed separately, urge caution regarding the interpretation of promising prediction results based on neuroimaging data from small samples and emphasizes that some of the prediction accuracies from previous studies may result from overestimation due to homogeneous data and weak cross-validation schemes. The promise of resting-state neuroimaging data to play an important role in the prediction of CBT treatment outcomes in patients with anxiety disorders remains yet to be delivered., Competing Interests: Declaration of competing interest The authors declare there is no conflict of interests., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)
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- 2024
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4. Misclassification of Self-Directed Violence.
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Teismann T, Eimen JJ, and Cwik JC
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- Humans, Violence, Students, Suicide, Attempted psychology, Suicidal Ideation
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Background: Classification of acts of self-directed violence has been shown to be inadequate in past research. Furthermore, level of expertise have been shown to be unrelated to classification correctness. Aim: The aim of the present study was to investigate whether participants provided with a definition are more reliable in their judgment than participants without a definition. Method: Two hundred sixty-one participants (psychology students, psychotherapists-in-training) were presented with case vignettes describing different acts of self-directed violence and were asked to make a classification. On the basis of randomized allocation, half of the participants received a definition of the different acts of self-directed violence, whereas the others did not. Results: Overall, 24.9% of the cases were misclassified. The presentation of a definition was not accompanied by a higher classification accuracy. Limitations: There may be issues about the validity of the case vignettes. Conclusions: The results highlight the importance of more methodological training of psychologists regarding suicidal issues.
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- 2023
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5. Screening and assessment for cancer patients' psychosocial support needs: Development and validation of the psychosocial risk questionnaire.
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Bussmann S, Vaganian L, Gerlach AL, Kusch M, Labouvie H, and Cwik JC
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- Humans, Early Detection of Cancer, Adaptation, Psychological, Psychometrics, Surveys and Questionnaires, Reproducibility of Results, Psychosocial Support Systems, Neoplasms psychology
- Abstract
Purpose: Psychosocial factors can negatively influence the ability to cope with cancer-specific therapy. To identify high-risk patients and to offer need-based care concerning social issues, valid, reliable, and economic instruments are needed. This study aims to develop a tool assessing psychosocial support needs and analyze its psychometric properties., Methods: Based on an extensive literature search, items for the scale of psychosocial risks (PSR) were developed to assess the need for psychosocial support. Overall, N = 343 participants with cancer took part in the study to investigate the psychometric properties of the PSR. The factor structure was examined by using a principal component analysis. Correlations with criteria-related constructs determined the convergent validity. Cut-off scores for the PSR were selected based on receiver-operating characteristics and the calculation of Youden indices., Results: The principal component analysis suggests a two-factor structure: (1) Psychosocial support need to ensure medical and social care services, and (2) Support need for coping with problems. The predicted correlations confirm the convergent validity. Both scales showed excellent internal consistency (Ensure medical and social care services: Omega = 0.94) and (Coping with problems: Omega = 0.90)., Conclusion: The newly developed scale can provide helpful information regarding psychosocial support needs to professionals (psychotherapists, psychologists, physicians, and social workers) in the psycho-oncological field. Based on this information, specific and personalized interventions for cancer patients can be offered. The PSR is appropriate for assessing specific psychosocial needs to support cancer patients., Competing Interests: Declaration of competing interest All authors declare that they have no conflict of interest and are not affiliated with or supported by industrial companies., (Copyright © 2022 Elsevier Ltd. All rights reserved.)
- Published
- 2023
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6. Psychometric evaluation of the Positive Mental Health (PMH) scale using item response theory.
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Vaganian L, Boecker M, Bussmann S, Kusch M, Labouvie H, Margraf J, Gerlach AL, and Cwik JC
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- Humans, Psychometrics methods, Reproducibility of Results, Surveys and Questionnaires, Mental Health, Patient Reported Outcome Measures
- Abstract
Background: The investigation of patient-reported outcomes and psycho-oncological interventions mainly focuses on psychological distress or psychopathology. However, the recognition of the equal importance of positive mental health (PMH) has increased lately. The PMH-scale is a brief questionnaire allowing to assess well-being in individuals in the general population and in patients. Previous studies evaluated the psychometric properties of the PMH-scale using classical test theory (CTT). This study is the first to investigate the PMH-scale in patients with cancer using item analysis according to the Rasch model., Methods: In total, N = 357 cancer patients participated in the study. A Rasch analysis of the PMH-scale was conducted including testing of unidimensionality, local independence, homogeneity and differential item functioning (DIF) with regard to age, gender, type of cancer, the presence of metastases, psycho-oncological support, and duration of disease. Additionally, the ordering of the item thresholds as well as the targeting of the scale were investigated., Results: After excluding one misfitting item and accounting for local dependence by forming superitems, a satisfactory overall fit to the Rasch model was established (χ
2 = 30.34, p = 0.21). The new PMH-8 scale proved to be unidimensional, and homogeneity of the scale could be inferred. All items showed ordered thresholds, there was no further item misfit. DIF was found for age, but as the impact of DIF was not substantial, no adjustment related to the age-DIF had to be made. The Person Separation Index (PSI = 0.89) was excellent, indicating excellent discriminatory power between different levels of positive mental health. Overall, the targeting of the PMH-8 was good for the majority of the present sample. However, at both ends of the scale item thresholds are missing as indicated by a slight floor effect (1.4%) and a considerable ceiling effect (9.8%)., Conclusions: Overall, the results of the analysis according to the Rasch model support the use of the revised PMH-scale in a psycho-oncological context., (© 2022. The Author(s).)- Published
- 2022
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7. Integrated, cross-sectoral psycho-oncology (isPO): a new form of care for newly diagnosed cancer patients in Germany.
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Kusch M, Labouvie H, Schiewer V, Talalaev N, Cwik JC, Bussmann S, Vaganian L, Gerlach AL, Dresen A, Cecon N, Salm S, Krieger T, Pfaff H, Lemmen C, Derendorf L, Stock S, Samel C, Hagemeier A, Hellmich M, Leicher B, Hültenschmidt G, Swoboda J, Haas P, Arning A, Göttel A, Schwickerath K, Graeven U, Houwaart S, Kerek-Bodden H, Krebs S, Muth C, Hecker C, Reiser M, Mauch C, Benner J, Schmidt G, Karlowsky C, Vimalanandan G, Matyschik L, Galonska L, Francke A, Osborne K, Nestle U, Bäumer M, Schmitz K, Wolf J, and Hallek M
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- Germany epidemiology, Humans, National Health Programs, Quality of Life, Neoplasms therapy, Psycho-Oncology
- Abstract
Background: The annual incidence of new cancer cases has been increasing worldwide for many years, and is likely to continue to rise. In Germany, the number of new cancer cases is expected to increase by 20% until 2030. Half of all cancer patients experience significant emotional and psychosocial distress along the continuum of their disease, treatment, and aftercare, and also as long-term survivors. Consequently, in many countries, psycho-oncological programs have been developed to address this added burden at both the individual and population level. These programs promote the active engagement of patients in their cancer therapy, aftercare and survivorship planning and aim to improve the patients' quality of life. In Germany, the "new form of care isPO" ("nFC-isPO"; integrated, cross-sectoral psycho-oncology/integrierte, sektorenübergreifende Psycho-Onkologie) is currently being developed, implemented and evaluated. This approach strives to accomplish the goals devised in the National Cancer Plan by providing psycho-oncological care to all cancer patients according to their individual healthcare needs. The term "new form of care" is defined by the Innovation Fund (IF) of Germany's Federal Joint Committee as "a structured and legally binding cooperation between different professional groups and/or institutions in medical and non-medical care". The nFC-isPO is part of the isPO project funded by the IF. It is implemented in four local cancer centres and is currently undergoing a continuous quality improvement process. As part of the isPO project the nFC-isPO is being evaluated by an independent institution: the Institute for Medical Sociology, Health Services Research, and Rehabilitation Science (IMVR), University of Cologne, Germany. The four-year isPO project was selected by the IF to be eligible for funding because it meets the requirements of the federal government's National Cancer Plan (NCP), in particular, the "further development of the oncological care structures and quality assurance" in the psycho-oncological domain. An independent evaluation is required by the IF to verify if the new form of care leads to an improvement in cross-sectoral care and to explore its potential for permanent integration into the German health care system., Methods: The nFC-isPO consists of six components: a concept of care (C1), care pathways (C2), a psycho-oncological care network (C3), a care process organization plan (C4), an IT-supported documentation and assistance system (C5) and a quality management system (C6). The two components concept of care (C1) and care pathways (C2) represent the isPO clinical care program, according to which the individual cancer patients are offered psycho-oncological services within a period of 12 months after program enrolment following the diagnosis of cancer. The remaining components (C3-C6) represent the formal-administrative aspects of the nFC-isPO that are intended to meet the legally binding requirements of patient care in the German health care system. With the aim of systematic development of the nFC-isPO while at the same time enabling the external evaluators to examine its quality, effectiveness and efficiency under conditions of routine care, the project partners took into consideration approaches from translational psycho-oncology, practice-based health care research and program theory. In order to develop a structured, population-based isPO care program, reference was made to a specific program theory, to the stepped-care approach, and also to evidence-based guideline recommendations., Results: The basic version, nFC-isPO, was created over the first year after the start of the isPO project in October 2017, and has since been subject to a continuous quality improvement process. In 2019, the nFC-isPO was implemented at four local psycho-oncological care networks in the federal state North Rhine-Westphalia, in Germany. The legal basis of the implementation is a contract for "special care" with the German statutory health insurance funds according to state law (§ 140a SCB V; Social Code Book V for the statutory health insurance funds). Besides the accompanying external evaluation by the IMVR, the nFC-isPO is subjected to quarterly internal and cross-network quality assurance and improvement measures (internal evaluation) in order to ensure continuous quality improvement process. These quality management measures are developed and tested in the isPO project and are to be retained in order to ensure the sustainability of the quality of nFC-isPO for later dissemination into the German health care system., Discussion: Demands on quality, effectiveness and cost-effectiveness of in the German health care system are increasing, whereas financial resources are declining, especially for psychosocial services. At the same time, knowledge about evidence-based screening, assessment and intervention in cancer patients and about the provision of psychosocial oncological services is growing continuously. Due to the legal framework of the statutory health insurance in Germany, it has taken years to put sound psycho-oncological findings from research into practice. Ensuring the adequate and sustainable financing of a needs-oriented, psycho-oncological care approach for all newly diagnosed cancer patients, as required by the NCP, may still require many additional years. The aim of the isPO project is to develop a new form of psycho-oncological care for the individual and the population suffering from cancer, and to provide those responsible for German health policy with a sound basis for decision-making on the timely dissemination of psycho-oncological services in the German health care system., Trial Registration: The study was pre-registered at the German Clinical Trials Register (https://www.drks.de/DRKS00015326) under the following trial registration number: DRKS00015326 ; Date of registration: October 30, 2018., (© 2022. The Author(s).)
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- 2022
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8. Psychotherapists' Knowledge of Guideline Recommendations for the Treatment of Depressed Suicidal Patients.
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Teismann T, Düwel H, Eidt L, Brailovskaia J, and Cwik JC
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Objective: Clinical practice guidelines present expert consensus on the treatment of mental disorders. Yet, studies have shown that knowledge of and adherence to recommendations are moderate. The aim of the present study was to investigate, whether and to what extent psychotherapists are aware of and follow the German guideline recommendations for the treatment of suicidal depressed patients., Methods: 174 participants (licensed psychotherapists, psychotherapists-in-training) were presented with five groups of guideline recommendations (referring to inpatient admission, psychotherapy, acute pharmacotherapy, pharmacologic relapse prevention, follow-up appointments) and were asked to identify the guideline recommendation and indicate whether they provided treatment according to the guideline., Results: Knowledge and adherence to the guidelines recommendations on psychotherapy and inpatient admission were well present. However, knowledge about pharmacological treatment recommendations was low; same as the knowledge on the necessity of immediate follow-up appointments after discharge of patients hospitalized due to suicidality., Discussion: The results highlight the importance of greater dissemination of various facts about the management of suicidal patients., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Teismann, Düwel, Eidt, Brailovskaia and Cwik.)
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- 2022
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9. An item analysis according to the Rasch model of the German 12-item WHO Disability Assessment Schedule (WHODAS 2.0).
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Vaganian L, Bussmann S, Boecker M, Kusch M, Labouvie H, Gerlach AL, and Cwik JC
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- Humans, Psychometrics, Reproducibility of Results, World Health Organization, Disability Evaluation, Quality of Life psychology
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Purpose: The World Health Organization Disability Assessent Schedule 2.0 (WHODAS 2.0) assesses disability in individuals irrespective of their health condition. Previous studies validated the usefulness of the WHODAS 2.0 using classical test theory. This study is the first investigating the psychometric properties of the 12-items WHODAS 2.0 in patients with cancer using item analysis according to the Rasch model., Methods: In total, 350 cancer patients participated in the study. Rasch analysis of the 12-items version of the WHODAS 2.0 was conducted and included testing unidimensionality, local independence, and testing for differential item functioning (DIF) with regard to age, gender, type of cancer, presence of metastases, psycho-oncological support, and duration of disease., Results: After accounting for local dependence, which was mainly found across items of the same WHODAS domain, satisfactory overall fit to the Rasch model was established (χ
2 = 36.14, p = 0.07) with good reliability (PSI = 0.82) and unidimensionality of the scale. DIF was found for gender (testlet 'Life activities') and age (testlet 'Getting around/Self-care'), but the size of DIF was not substantial., Conclusion: Overall, the analysis results according to the Rasch model support the use of the WHODAS 2.0 12-item version as a measure of disability in cancer patients., (© 2021. The Author(s).)- Published
- 2021
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10. The significance of the Interpersonal-Psychological Theory of Suicide in an oncological context-A scoping review.
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Schomberg J, Teismann T, Bussmann S, Vaganian L, Gerlach AL, and Cwik JC
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- Humans, Psychological Theory, Risk Factors, Suicidal Ideation, Interpersonal Relations, Suicide
- Abstract
Objectives: Since individuals afflicted with cancer are at an elevated risk of dying by suicide, understanding suicide-related ideation and behaviours is critical in identifying vulnerable patients. The interpersonal theory of suicide (IPTS) provides a framework to research risk factors for suicide and has been validated in different samples. The aim of this scoping review is to study literature related to IPTS and cancer patients., Methods: This scoping review was registered with the OPEN Science Framework (osf.io/92465). The databases PsycINFO, Web of Science, PubMed and PubMed Central were searched. Eligible research needed to use a minimum of one psychometric element to measure at least one of the factors of the IPTS in individuals with cancer., Results: Ninety-six studies were identified and screened. Eligible research included individuals with cancer and the use of at least one measurement of at least one of the factors of the IPTS. Overall, four articles met the inclusion criteria and three studies found significant associations of components of the IPTS and suicidal ideation/behaviour., Conclusion: While these initial findings support the notion that the IPTS is relevant for individuals with cancer as well, a direct validation of the IPTS in cancer patients is needed., (© 2020 The Authors. European Journal of Cancer Care published by John Wiley & Sons Ltd.)
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- 2021
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11. The Effects of Modifying Dysfunctional Appraisals in Posttraumatic Stress Disorder Using a Form of Cognitive Bias Modification: Results of a Randomized Controlled Trial in an Inpatient Setting.
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Woud ML, Blackwell SE, Shkreli L, Würtz F, Cwik JC, Margraf J, Holmes EA, Steudte-Schmiedgen S, Herpertz S, and Kessler H
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- Cognition, Double-Blind Method, Humans, Hydrocortisone, Inpatients, Stress Disorders, Post-Traumatic therapy
- Abstract
Introduction: Dysfunctional appraisals about traumatic events and their sequelae are a key mechanism in posttraumatic stress disorder (PTSD). Experimental studies have shown that a computerized cognitive training, cognitive bias modification for appraisals (CBM-APP), can modify dysfunctional appraisals and reduce analogue trauma symptoms amongst healthy and subclinical volunteers., Objective: We aimed to test whether CBM-APP could reduce dysfunctional appraisals related to trauma reactions in PTSD patients, and whether this would lead to improvements in PTSD symptoms., Methods: We compared CBM-APP to sham training in a parallel-arm proof-of-principle double-blind randomized controlled trial amongst 80 PTSD patients admitted to an inpatient clinic. Both arms comprised a training schedule of 8 sessions over a 2-week period and were completed as an adjunct to the standard treatment programme., Results: In intention-to-treat analyses, participants receiving CBM-APP showed a greater reduction in dysfunctional appraisals on a scenario task from pre- to posttraining (primary outcome) assessments, compared to those receiving sham training (d = 1.30, 95% CI 0.82-1.80), with between-group differences also found on the Posttraumatic Cognitions Inventory (PTCI; d = 0.85, 95% CI 0.39-1.32) and the PTSD Checklist for DSM-5 (PCL-5; d = 0.68, 95% CI 0.23-1.14), but not for long-term cortisol concentrations (d = 0.25, 95% CI -0.28 to 0.78). Reductions in dysfunctional appraisals assessed via the scenario task correlated with reductions on the PTCI, PCL-5, and hair cortisol concentrations from pre- to posttraining time points., Conclusions: Results support dysfunctional appraisals as a modifiable cognitive mechanism, and that their proximal modification transfers to downstream PTSD symptoms. These findings could open new avenues for improving present therapeutic approaches., (© 2021 S. Karger AG, Basel.)
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- 2021
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12. Associations Between Difficulties in Emotion Regulation and Post-Traumatic Stress Disorder in Deployed Service Members of the German Armed Forces.
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Spies JP, Cwik JC, Willmund GD, Knaevelsrud C, Schumacher S, Niemeyer H, Engel S, Küster A, Muschalla B, Köhler K, Weiss D, and Rau H
- Abstract
Background: Experiencing a traumatic event can lead to post-traumatic stress disorder (PTSD), but not every traumatized person develops PTSD. Several protective and risk factors have been identified in civilians and veterans to explain why some individuals develop PTSD and others do not. However, no research has confirmed the relationship between emotion regulation and PTSD in deployed German Armed Forces service members after a foreign assignment. Previous studies have identified some protective factors, such as social support, social acknowledgment, specific personal values, and posttraumatic growth, as well as risk factors, like moral injury and emotion regulation. Thus, the aim of the present study is to confirm the relationship between emotion regulation and PTSD and to test for factors that are associated with higher severity of PTSD symptoms in such a sample., Methods: A post-hoc secondary analysis was conducted on data collected in a randomized controlled trial. Participants ( N = 72) were male active and former military service members that have returned from deployment and were recruited from the German Armed Forces. These participants were separated into two groups according to PTSD diagnosis based on the results of a structured diagnostic interview. Data from evaluation questionnaires administered upon entry into the study were subjected to a cross-sectional analysis. The measures included the severity of PTSD symptoms, clusters of PTSD symptoms, clinical measures, and several measures assessing PTSD-related constructs. Analyses included the Spearman rank correlation coefficient, X
2 tests for nominal data, Mann-Whitney U-tests for non-parametric data, and a mediation analysis., Results: The results of the mediation analysis revealed that difficulties in emotion regulation were significantly associated with the severity of PTSD symptoms, which was mediated by social acknowledgment and experimental avoidance but not by moral injury. The analyses showed that the severity of PTSD symptoms and all clusters of PTSD symptoms were significantly associated with most of the measured constructs in expectable directions. Participants in the PTSD group showed significantly higher mean scores on questionnaires measuring constructs that have been associated with PTSD, like emotion regulation and moral injury. They also showed lower mean scores in questionnaires for social support and social acknowledgment as a victim or survivor than participants in the non-PTSD group., Conclusion: The present results show that difficulties in emotion regulation are directly associated with the severity of PTSD symptoms in service members of the German Armed Forces. This association is mediated by social acknowledgment and experimental avoidance, but not by moral injury. Thus, future studies should investigate these potentially crucial factors for better understanding of the development and maintenance of PTSD in service members of the German Armed Forces after deployment to create possible treatment adaptions., Clinical Trial Registration: Australian Clinical Trials Registry, identifier ACTRN 12616000956404 http://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=370924., (Copyright © 2020 Spies, Cwik, Willmund, Knaevelsrud, Schumacher, Niemeyer, Engel, Küster, Muschalla, Köhler, Weiss and Rau.)- Published
- 2020
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13. Validation of the German capability for suicide questionnaire (GCSQ) in a high-risk sample of suicidal inpatients.
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Cwik JC, Forkmann T, Glaesmer H, Paashaus L, Schönfelder A, Rath D, Prinz S, Juckel G, and Teismann T
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- Female, Humans, Male, Psychometrics, Reproducibility of Results, Surveys and Questionnaires, Inpatients, Suicidal Ideation
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Background: The German Capability for Suicide Questionnaire (GCSQ) was developed to measure fearlessness of death and pain tolerance - two constructs central to the Interpersonal Theory of Suicide. Initial scale development, definition of the factor structure and confirmation of the two-dimensional factor structure was performed in samples suffering from relatively low levels of suicide ideation/behavior. The present study aimed to validate the German Capability for Suicide Questionnaire (GCSQ) in a high-risk sample of suicidal inpatients., Methods: Factor structure, reliability and validity were investigated in a sample of inpatients (N = 296; 53.0% female; age in years: M = 36.81, SD = 14.27) admitted to a hospital due to a recent suicide attempt or an acute suicidal crisis (in immediate need of inpatient treatment). To establish convergent validity, interview-based assessments of lifetime suicide attempts and non-suicidal self-injury as well as questionnaire-based assessments of painful and provocative events were used. Finally, stability of GCSQ-scores over a follow-up period of 12 months was assessed., Results: Results indicated good psychometric properties, and provided additional evidence for construct validity and stability of the subscales over a one-year period, and demonstrated adequate fit of the data with respect to the original factor structure., Conclusions: Results suggest that the GCSQ is a brief, reliable, and valid measure of capability for suicide that can be used in clinic assessment and research.
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- 2020
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14. Reduced gray matter volume in the left prefrontal, occipital, and temporal regions as predictors for posttraumatic stress disorder: a voxel-based morphometric study.
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Cwik JC, Vahle N, Woud ML, Potthoff D, Kessler H, Sartory G, and Seitz RJ
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- Adult, Amygdala diagnostic imaging, Amygdala pathology, Disease Susceptibility diagnostic imaging, Disease Susceptibility pathology, Female, Gray Matter diagnostic imaging, Hippocampus diagnostic imaging, Hippocampus pathology, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Occipital Lobe diagnostic imaging, Prefrontal Cortex diagnostic imaging, Stress Disorders, Post-Traumatic diagnostic imaging, Stress Disorders, Post-Traumatic physiopathology, Stress Disorders, Traumatic, Acute diagnostic imaging, Stress Disorders, Traumatic, Acute physiopathology, Temporal Lobe diagnostic imaging, Time Factors, Visual Cortex diagnostic imaging, Visual Cortex pathology, Young Adult, Gray Matter pathology, Occipital Lobe pathology, Prefrontal Cortex pathology, Stress Disorders, Post-Traumatic pathology, Stress Disorders, Traumatic, Acute pathology, Temporal Lobe pathology
- Abstract
The concept of acute stress disorder (ASD) was introduced as a diagnostic entity to improve the identification of traumatized people who are likely to develop posttraumatic stress disorder (PTSD). Neuroanatomical models suggest that changes in the prefrontal cortex, amygdala, and hippocampus play a role in the development of PTSD. Using voxel-based morphometry, this study aimed to investigate the predictive power of gray matter volume (GMV) alterations for developing PTSD. The GMVs of ASD patients (n = 21) were compared to those of PTSD patients (n = 17) and healthy controls (n = 18) in whole-brain and region-of-interest analyses. The GMV alterations seen in ASD patients shortly after the traumatic event (T1) were also correlated with PTSD symptom severity and symptom clusters 4 weeks later (T2). Compared with healthy controls, the ASD patients had significantly reduced GMV in the left visual cortex shortly after the traumatic event (T1) and in the left occipital and prefrontal regions 4 weeks later (T2); no significant differences in GMV were seen between the ASD and PTSD patients. Furthermore, a significant negative association was found between the GMV reduction in the left lateral temporal regions seen after the traumatic event (T1) and PTSD hyperarousal symptoms 4 weeks later (T2). Neither amygdala nor hippocampus alterations were predictive for the development of PTSD. These data suggest that gray matter deficiencies in the left hemispheric occipital and temporal regions in ASD patients may predict a liability for developing PTSD.
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- 2020
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15. Psychometric properties of the German version of the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) in clinical routine settings: study design and protocol of a multitrait-multimethod study.
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Spies JP, Woud ML, Kessler H, Rau H, Willmund GD, Köhler K, Herpertz S, Blackwell SE, Bovin M, Marx BP, and Cwik JC
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- Humans, Diagnostic and Statistical Manual of Mental Disorders, Germany, Multicenter Studies as Topic, Observational Studies as Topic, Psychometrics, Stress Disorders, Post-Traumatic psychology
- Abstract
Introduction: The aim of this study is to investigate the diagnostic accuracy, psychometric properties and clinical utility of the German version of the Clinician-Administered Post-Traumatic Stress Disorder (PTSD) Scale for Diagnostic and Statistical Manual of Mental Disorders-5 (DSM-5) (CAPS-5) in routine clinical settings., Methods and Analysis: This study is a non-interventional, multitrait-multimethod design, multicentre study that will be carried out at German civil and military inpatient and outpatient clinics. A total sample size of n=219 participants who have experienced at least one traumatic event according to criteria as defined in the DSM-5 will be recruited. For the investigation of the diagnostic accuracy and clinical utility of the CAPS-5, participants will be categorised into one of three groups, depending on their traumatic experiences and post-traumatic symptomatology: (1) monotraumatisation with PTSD; (2) multiple traumatisation with PTSD and (3) traumatisation without PTSD. Interviews will be conducted face to face by interviewers in routine clinical settings. All participants will also be asked to complete a comprehensive set of questionnaires in order to investigate different facets of construct validity and clinical utility. First, differences between all three groups in CAPS-5 sum and subscale scores will be investigated. Test-retest reliability and inter-rater reliability will be determined. Internal consistency will be calculated using structural equation modeling (SEM) based internal consistency coefficients. Construct validity will be measured with Spearman's rank correlation analyses and multivariate analyses of variance with Holm-Bonferroni corrected post hoc analysis of variances. In order to test diagnostic accuracy, receiver operating characteristics and sensitivity and specificity analyses will be conducted. The model structure of the German CAPS-5 will be analysed using confirmatory factor analyses., Ethics and Dissemination: The study received ethical approval by the Ethics Committees of the Faculty of Psychology at the Ruhr-Universität Bochum (reference numbers: 331 and 358). The results of the study will be presented nationally and internationally at scientific conferences and will be published in scientific journals., Trial Registration Number: DRKS00015325., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2020
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16. Critical consideration of assessment methods for clinically significant changes of mental distress after psycho-oncological interventions.
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Vaganian L, Bussmann S, Gerlach AL, Kusch M, Labouvie H, and Cwik JC
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- Adult, Aged, Anxiety etiology, Depression etiology, Female, Follow-Up Studies, Humans, Male, Middle Aged, Psychological Distress, Stress, Psychological etiology, Anxiety therapy, Depression therapy, Neoplasms psychology, Outcome Assessment, Health Care methods, Outcome Assessment, Health Care standards, Psychosocial Intervention, Stress, Psychological therapy
- Abstract
Objectives: Considering the heterogeneity of cancer entities and the associated disease progression, personalized care of patients is increasingly emphasized in psycho-oncology. This individualization makes the use of measurements of individual clinically significant change important when studying the efficacy and effectiveness of psycho-oncological care. Two conceptualizations for the measurement of clinical significance are critically contrasted in this study: the Reliable Change Index (RCI) and the Minimal Important Difference (MID) method., Methods: In total, 2,121 cancer patients participated in the study and a subsample of 708 patients was reassessed about 4 months later. Psychological distress was measured using the Hospital Anxiety and Depression Scale. We evaluated two measures of clinical significance (RCI, MID) by comparing the respective numbers of improved, unimproved, and deteriorated patients., Results: Individually significant changes were observed with both methods; however, determined rates of improvement differed substantially: MID (66.67%) and RCI (48.23%). Most importantly, according to MID, 17.93% of patients were identified as being improved, although their respective improvements were not statistically significant and thus unreliable., Conclusions: The benefits of RCI outweigh MID, and therefore, the RCI is recommended as a measure to assess change., (© 2020 The Authors. International Journal of Methods in Psychiatric Research Published by John Wiley & Sons Ltd.)
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- 2020
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17. Evaluation of a complex integrated, cross-sectoral psycho-oncological care program (isPO): a mixed-methods study protocol.
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Jenniches I, Lemmen C, Cwik JC, Kusch M, Labouvie H, Scholten N, Gerlach A, Stock S, Samel C, Hagemeier A, Hellmich M, Haas P, Hallek M, Pfaff H, and Dresen A
- Subjects
- Adult, Attitude of Health Personnel, Case-Control Studies, Data Accuracy, Evaluation Studies as Topic, Female, Focus Groups methods, Germany epidemiology, Humans, Insurance, Health economics, Interviews as Topic methods, Male, Neoplasms therapy, Primary Health Care standards, Program Evaluation statistics & numerical data, Prospective Studies, Research Design, Surveys and Questionnaires, Health Personnel statistics & numerical data, Insurance, Health statistics & numerical data, Neoplasms psychology, Primary Health Care methods, Psycho-Oncology methods
- Abstract
Introduction: International standards of care require the complete integration of psycho-oncological care into biomedical cancer treatment. The structured integrated, cross-sectoral psycho-oncological programme 'isPO' is aiming to ensure a provision of care in inpatient and outpatient settings according to a stepped-care approach. Up to now, psycho-oncological care is missing regulated and standardised processes to demonstrate the effectiveness. This study protocol describes the process and outcome evaluation that is conducted, along with the isPO study. The programme evaluation is aiming to proof effectiveness, explain potential discrepancies between expected and observed outcomes. Additionally, provide insight into the implementation process, as well as contextual factors that might promote or inhibit the dissemination and implementation of the stepped care programme will be gained. In addition to these measures, a cost-consequence analysis will provide further evidence aimed at integrating psycho-oncological care into primary healthcare., Methods and Analysis: The evaluation concept is based on a tripartite strategy consisting of a prospective, formative and summative evaluation. To capture all determinants, a concurrent mixed-method design is applied comprising qualitative (interviews and focus groups) and quantitative (standardised questionnaires) surveys of patients and healthcare providers. In addition, analysis of the psycho-oncological care data (isPO care data) and statutory health insurance claims data will be conducted. Primary and secondary data will complement one another (data linkage) to obtain a more comprehensive picture of the effectiveness and implementation of the complex intervention within the isPO study., Ethics and Dissemination: The study has been approved by the ethics committee of the Medical Faculty of the University of Cologne. For all collected data, the relevant national and European data protection regulations will be considered. All personal identifiers (eg, name, date of birth) will be pseudonymised. Dissemination strategies include annual reports as well as quality workshops for the organisations, the presentation of results in publications and on conferences, and public relations., Trial Registration Number: DRKS00015326; Pre-results., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2020
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18. Short defeat and entrapment scale: A psychometric investigation in three German samples.
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Höller I, Teismann T, Cwik JC, Glaesmer H, Spangenberg L, Hallensleben N, Paashaus L, Rath D, Schönfelder A, Juckel G, and Forkmann T
- Abstract
Background: The present study aimed to validate the German version of the Short Defeat and Entrapment Scale (SDES)., Methods: Validity and reliability were established in an online (N = 480), an outpatient (N = 277) and an inpatient sample (N = 296). Statistical analyses included confirmatory factor analyses (CFA) and group differences in defeat and entrapment., Results: For the online and the inpatient sample, the CFA indicated a two-factor solution, whereas for the outpatient sample both one- and two-factor solutions fitted the data equally well. Scale properties for the two-factor solution (defeat and entrapment subscale) were excellent. Thus, further analyses were based on this solution. For the online and the outpatient sample, suicidal ideators and suicide attempters scored significantly higher in defeat and entrapment than non-ideators and non-attempters., Limitations: Limiting factors of the study were the different measures across the samples and the cross-sectional design of the study., Conclusion: Though results were partly mixed, we found support for a two-factor solution of the instrument showing excellent psychometric properties in all three samples. The two-factor solution is further expected to have higher clinical utility than a one-factor solution. Suicidal ideators and suicide attempters in the online and outpatient sample showed higher scores in defeat and entrapment than non-ideators and non-attempters, emphasizing these two concepts as predictors for suicidal ideation. All in all, the present study supports the general validity and reliability of the SDES. However, future investigations based on prospective data are warranted., Competing Interests: Conflict of interest All authors declare that they have no conflict of interest., (Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.)
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- 2020
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19. Investigating the effect of proactive interference control training on intrusive memories.
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Woud ML, Heeren A, Shkreli L, Meyer T, Egeri L, Cwik JC, Zlomuzica A, Kessler H, and Margraf J
- Abstract
Intrusive re-experiencing is a hallmark symptom of Posttraumatic Stress Disorder (PTSD). According to prominent models of intrusive phenomena, intrusive memories may result from impairments in the efficiency of working memory capacity (WMC), more specifically proactive interference control. Yet, experimental research is scarce. Therefore, the present study aimed to investigate experimentally the role of proactive interference control in intrusive memories. We randomly assigned 57 healthy participants to either receive a high interference control training or a low interference control training. Participants were then exposed to highly distressing film clips. WMC was assessed before and after the training. Intrusion symptoms were assessed directly post-training and after one week using an Intrusion Provocation Task (IPT), a one-week intrusions diary, and the retrospective intrusion subscale of the Impact of Event Sale - Revised (IES-R). Results indicated that both groups reported improvements in WMC and fewer intrusions on the second IPT post-training, with no differences between groups. Similarly, no group differences on intrusions were found at one-week follow-up (i.e., intrusion diary and IES-R). To conclude, these data are not consistent with the hypothesis that WMC plays a role in intrusive re-experiencing. Implications for future research are discussed.
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- 2019
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20. HPA axis regulation in posttraumatic stress disorder: A meta-analysis focusing on potential moderators.
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Schumacher S, Niemeyer H, Engel S, Cwik JC, Laufer S, Klusmann H, and Knaevelsrud C
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- Dehydroepiandrosterone metabolism, Dehydroepiandrosterone Sulfate metabolism, Humans, Hydrocortisone metabolism, Hypothalamo-Hypophyseal System metabolism, Pituitary-Adrenal System metabolism, Stress Disorders, Post-Traumatic metabolism
- Abstract
Posttraumatic stress disorder (PTSD) is often associated with alterations in the hypothalamic-pituitary-adrenal (HPA) axis. Previous findings are inconsistent, possibly due to trauma exposure of controls or different hormone measurement methods. We investigated cortisol, dehydroepiandrosterone (DHEA) and its sulfate (DHEA-S) in adults with clinical PTSD under basal or challenged conditions (Prospero registration no. CRD42016041690). A search of PubMed, Scopus, Medline, PsycINFO, Pilots/ProQuest, and Web of Science resulted in 108 included studies (N = 6484). Morning and 24 h cortisol were significantly lower in PTSD than in controls (g = -0.21; 95% CI: -0.42-(-0.01); g = -0.31; CI: -0.60-(-0.03)). Significant cortisol increases occurred after awakening in PTSD (g = 0.40; CI: 0.13-0.67) and in non-exposed controls (g = 0.96; CI: 0.59-1.33). Evening DHEA was significantly higher in PTSD than in non-exposed controls (g = 0.58; CI: 0.17-0.99). All groups showed large cortisol suppression effects after dexamethasone administration. Overall, the potential moderators investigated did not reveal a consistent pattern of HPA alterations., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
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- 2019
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21. Long-Term Effectiveness of Cognitive Behavioral Therapy in Routine Outpatient Care: A 5- to 20-Year Follow-Up Study.
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von Brachel R, Hirschfeld G, Berner A, Willutzki U, Teismann T, Cwik JC, Velten J, Schulte D, and Margraf J
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- Follow-Up Studies, Humans, Mental Disorders diagnosis, Middle Aged, Outpatients, Psychiatric Status Rating Scales, Severity of Illness Index, Treatment Outcome, Ambulatory Care methods, Cognitive Behavioral Therapy, Mental Disorders therapy
- Abstract
Objective: Long-term follow-ups several years after receiving cognitive behavioral therapy (CBT) are scarce and most of the existing literature describes follow-up data of randomized-controlled trials. Thus, very little is known about the long-term effects of CBT in routine care., Methods: We investigated psychological functioning in a sample of 263 former outpatients who had received CBT for a variety of mental disorders such as depression, anxiety-, eating- or somatoform disorders 8.06 (SD 5.08) years after treatment termination. All participants completed a diagnostic interview as well as the Brief-Symptom Inventory (BSI) and the Beck Depression Inventory (BDI). Effect sizes and response rates according to Jacobson and Truax [J Consult Clin Psychol 1991;59:12-9] were calculated from pre- to posttreatment and from pretreatment to follow-up assessment., Results: Pre- to posttreatment effect sizes ranged between 0.75 (BDI) and 0.63 (BSI) and pretreatment to follow-up effect sizes were 0.92 (BDI) and 0.75 (BSI). Of all patients, 29% (BDI) and 17% (BSI) experienced clinically significant change at posttreatment and 42% (BDI) and 24% (BSI) at follow-up., Conclusion: The results point to the long-term effectiveness of CBT under routine conditions for a wide array of problems, especially when compared to the long-term effects of medical treatment. It is noteworthy that the results at follow-up were even better than at posttreatment, indicating further improvement. However, about a quarter of the patients did not respond sufficiently to therapy, neither concerning short-term nor long-term effects., (© 2019 S. Karger AG, Basel.)
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- 2019
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22. Psychotherapeutic treatment and HPA axis regulation in posttraumatic stress disorder: A systematic review and meta-analysis.
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Schumacher S, Niemeyer H, Engel S, Cwik JC, and Knaevelsrud C
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- Dehydroepiandrosterone analysis, Dehydroepiandrosterone Sulfate analysis, Humans, Hydrocortisone analysis, Hypothalamo-Hypophyseal System metabolism, Pituitary-Adrenal System metabolism, Psychotherapy methods, Psychotropic Drugs therapeutic use, Treatment Outcome, Stress Disorders, Post-Traumatic metabolism, Stress Disorders, Post-Traumatic psychology, Stress Disorders, Post-Traumatic therapy
- Abstract
Posttraumatic stress disorder (PTSD) has been associated with dysregulation of the hypothalamic-pituitary- adrenal (HPA) axis. Research over the past years has investigated potential changes of these alterations in the context of psychotherapy. Yet, no systematic review has been conducted. To summarize the current state of research on psychotherapy and HPA hormones, namely cortisol, dehydroepiandrosterone and its sulfate form (DHEA(S)), we searched for studies investigating predictions or changes in hormones over treatment course within the databases PubMed, Scopus, Medline, PsychINFO, Pilots/ProQuest, and Web of Science, and in the grey literature up to May 2018. Controlled and uncontrolled trials investigating adult samples with a clinical status of PTSD were eligible for inclusion. Twelve studies (428 participants) were included. Study quality was overall sufficient. Hormone assessment designs differed considerably. Treatment efficacy on PTSD symptom reduction was mostly high, but predictions of pre-treatment hormone concentrations on treatment efficacy were largely non-significant. Changes from pre- to post-test in basal cortisol (g = -0.07, 95% CI = -0.36; 0.21) and in the cortisol awakening response (g = -0.07, 95% CI = -0.48; 0.35) were also non-significant. Future studies require comparable designs and need to be sufficiently powered to be able to detect potential associations with HPA regulation., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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23. Computerized positive mental imagery training versus cognitive control training versus treatment as usual in inpatient mental health settings: study protocol for a randomized controlled feasibility trial.
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Blackwell SE, Westermann K, Woud ML, Cwik JC, Neher T, Graz C, Nyhuis PW, and Margraf J
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Background: Enhancing the capacity to experience positive affect could help improve recovery across a range of areas of mental health. Experimental psychopathology research indicates that a computerized cognitive training paradigm involving generation of positive mental imagery can increase state positive affect, and more recent clinical studies have suggested that this training could be used as an adjunct treatment module to target symptoms related to positive affect deficits, specifically anhedonia. The current study investigates the feasibility of adding a positive mental imagery computerized training module to treatment for patients in inpatient mental health settings, with a focus on increasing positive affect and reducing anhedonia. The positive mental imagery training (PMIT) is added to treatment as usual (TAU) in the inpatient setting, and compared to TAU alone, or TAU plus an alternative cognitive training module not hypothesized to increase positive affect, cognitive control training (CCT)., Methods: The study is a feasibility randomized controlled trial with three parallel arms. Up to 90 patients admitted to inpatient mental health treatment clinics in Germany will be randomized to PMIT + TAU, CCT + TAU, or TAU on a 1:1:1 ratio. PMIT or CCT consist of an introductory session followed by up to 8 full training sessions over 2 weeks. All three arms (including TAU) include regular completion of mood measures over the 2-week period. Outcome measures are completed pre and post this 2-week training/monitoring period, and at 2-week follow-up. Data will be presented in the form of both raw means and standardized effect sizes, with 95% confidence intervals, for both intention-to-treat and per-protocol samples., Discussion: The study will inform feasibility of conducting a fully powered randomized controlled trial investigating the addition of the positive mental imagery training as a treatment adjunct to inpatient treatments for mental health, including potential refinement of study procedures, inclusion/exclusion criteria, and preliminary indications of the likely range of effect sizes., Trial Registration: clinicaltrials.gov, NCT02958228 (date registered: 4 November 2016)., Competing Interests: Ethical approval for the study was provided by the committee of the Faculty of Psychology, Ruhr-Universität Bochum (Germany) approval no. 325. All participants provide written informed consent at the start of the eligibility assessment for the study. Not applicable The authors declare that they have no competing interests. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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- 2018
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24. Augmenting inpatient treatment for post-traumatic stress disorder with a computerised cognitive bias modification procedure targeting appraisals (CBM-App): protocol for a randomised controlled trial.
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Woud ML, Blackwell SE, Cwik JC, Margraf J, Holmes EA, Steudte-Schmiedgen S, Herpertz S, and Kessler H
- Subjects
- Adaptation, Psychological, Adolescent, Adult, Double-Blind Method, Female, Hospitalization, Humans, Hydrocortisone analysis, Male, Middle Aged, Outcome Assessment, Health Care, Randomized Controlled Trials as Topic, Stress Disorders, Post-Traumatic psychology, Young Adult, Cognitive Behavioral Therapy methods, Stress Disorders, Post-Traumatic therapy
- Abstract
Introduction: Influential theories of post-traumatic stress disorder (PTSD) suggest that dysfunctional appraisals of trauma play a key role in the maintenance of symptoms, and this suggestion is increasingly supported by research. Experimental studies have indicated that a simple computerised cognitive training procedure, here termed cognitive bias modification-appraisals (CBM-App), can modify trauma-relevant appraisals and reduce analogue trauma symptoms among healthy volunteers. This suggests the possibility that CBM-App could improve outcomes in PTSD via targeting the key process of dysfunctional appraisals, for example, if applied as an adjunct to treatment., Methods and Analysis: The study is a randomised controlled trial with two parallel arms. It is planned to randomise 80 patients admitted for treatment for PTSD to an inpatient treatment clinic to complete either sessions of CBM-App or a sham-training control condition, the peripheral vision task. Both interventions comprise eight sessions scheduled over a 2-week period and are completed in addition to the standard treatment programme in the clinic. Outcome assessment occurs pretraining, after 1 week of training, post-training, at discharge from the inpatient clinic and 6 weeks and 3 months postdischarge. The primary outcome is dysfunctional trauma-relevant appraisals at post-training, measured using a scenario completion task. Secondary outcomes include symptom measures and hair cortisol. Outcome analyses will be primarily via mixed linear models and conducted with both intention to treat and per protocol samples., Ethics and Dissemination: The trial has been approved by the Ethics Committee for the Faculty of Psychology, Ruhr-Universität Bochum (approval no 204) and the Ethics Committee for the Faculty of Medicine, Ruhr-Universität Bochum (approval no 15-5477). Results will be published in peer-reviewed journals and will inform future clinical and experimental studies into targeting maladaptive appraisals for the reduction of PTSD symptoms., Trial Registration Number: NCT02687555., Competing Interests: Competing interests: None declared., (© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.)
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- 2018
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25. Effects of appraisal training on responses to a distressing autobiographical event.
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Woud ML, Zlomuzica A, Cwik JC, Margraf J, Shkreli L, Blackwell SE, Gladwin TE, and Ehring T
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- Adolescent, Adult, Female, Humans, Male, Stress Disorders, Post-Traumatic psychology, Treatment Outcome, Young Adult, Cognitive Remediation methods, Imagery, Psychotherapy methods, Life Change Events, Stress Disorders, Post-Traumatic therapy
- Abstract
Dysfunctional appraisals are a key factor suggested to be involved in the development and maintenance of PTSD. Research has shown that experimental induction of a positive or negative appraisal style following a laboratory stressor affects analogue posttraumatic stress symptoms. This supports a causal role of appraisal in the development of traumatic stress symptoms and the therapeutic promise of modifying appraisals to reduce PTSD symptoms. The present study aimed to extend previous findings by investigating the effects of experimentally induced appraisals on reactions to a naturally occurring analogue trauma and by examining effects on both explicit and implicit appraisals. Participants who had experienced a distressing life event were asked to imagine themselves in the most distressing moment of that event and then received either a positive or negative Cognitive Bias Modification training targeting appraisals (CBM-App). The CBM-App training induced training-congruent appraisals, but group differences in changes in appraisal over training were only seen for explicit and not implicit appraisals. However, participants trained positively reported less intrusion distress over the subsequent week than those trained negatively, and lower levels of overall posttraumatic stress symptoms. These data support the causal relationship between appraisals and trauma distress, and further illuminate the mechanisms linking the two., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
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- 2018
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26. Does napping enhance the effects of Cognitive Bias Modification-Appraisal training? An experimental study.
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Woud ML, Cwik JC, Blackwell SE, Kleim B, Holmes EA, Adolph D, Zhang H, and Margraf J
- Subjects
- Brain physiology, Electroencephalography, Female, Follow-Up Studies, Humans, Male, Motion Pictures, Neuropsychological Tests, Psychiatric Status Rating Scales, Regression Analysis, Stress, Psychological physiopathology, Treatment Outcome, Young Adult, Cognitive Behavioral Therapy methods, Emotions, Learning, Memory, Sleep physiology, Stress, Psychological therapy
- Abstract
Posttraumatic Stress Disorder (PTSD) is characterised by dysfunctional appraisals of the trauma and its consequences including one's own symptoms. Experimental studies have shown that Cognitive Bias Modification-Appraisal (CBM-App) training can reduce dysfunctional interpretations and analog trauma symptoms. One important question is how to enhance the effects of CBM-App. Following work suggesting that sleep has beneficial effects on consolidation processes and can thus improve learning, the present study investigated whether a brief period of sleep (i.e., a nap) enhances the effects of CBM-App. All participants watched a stressful movie as an analogue trauma induction. After that, participants received either positive or negative CBM-App training. Within each training, half of the participants then had a 90-minute nap or watched a neutral movie. Results showed that the CBM training induced training-congruent appraisals. Sleep did not enhance this effect. Participants who slept, however, experienced fewer intrusive memories of the analogue trauma, but this effect was independent of the CBM condition. These results provide valuable information about the effects of sleep during a 90-minute nap period on encoding of analogue trauma and emotional learning in the context of appraisal, and highlight the importance of sleep as a focus for continued research.
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- 2018
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27. [Concordance of DSM-5®-Diagnoses Based on Diagnostic Interviews with People with Mental Disorders and Relatives or Friends: Implications for Psychological Autopsy Studies].
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Cwik JC, Kessler H, Herpertz S, Becker G, Janetzky S, Sheverdina A, Westermann K, and Teismann T
- Subjects
- Adolescent, Adult, Aged, Female, Humans, Male, Middle Aged, Surveys and Questionnaires, Young Adult, Autopsy, Diagnostic and Statistical Manual of Mental Disorders, Family psychology, Friends psychology, Interview, Psychological, Mental Disorders diagnosis, Mental Disorders psychology, Suicide psychology
- Abstract
Background: The evaluation whether a person who died by suicide suffered from a psychiatric disorder poses a diagnostic problem on psychological autopsy studies and is debated controversially., Objective: Do patients and relatives or friends agree on DSM-5
® -diagnoses?, Methods: A sample of N=20 inpatients and their relatives or friends were interviewed using a structured-clinical interview. In total agreement on 78 patient-based and 72 relatives- or friends-based diagnoses could be assessed., Results: Agreement of patients' and relatives' or friend's diagnoses was low. Moderate concordance was found for the following diagnoses: Posttraumatic Stress Disorder, Somatic Symptom Disorder, Borderline Personality Disorder, and Binge-Eating Disorder. Only for the Persistent Depressive Disorder, the Binge-Eating Disorder, and the Borderline Personality Disorder good positive predictive values (0.75-0.80) were observed., Conclusion: On the basis of interviews with relatives or friends, no reliable diagnostic decisions can be made., Competing Interests: Die Autoren geben an, dass kein Interessenkonflikt besteht., (© Georg Thieme Verlag KG Stuttgart · New York.)- Published
- 2018
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28. Brief reasons for living inventory: a psychometric investigation.
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Cwik JC, Siegmann P, Willutzki U, Nyhuis P, Wolter M, Forkmann T, Glaesmer H, and Teismann T
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- Adult, Factor Analysis, Statistical, Female, Germany, Humans, Male, Middle Aged, Psychometrics, Reproducibility of Results, Depression psychology, Personality Inventory standards, Suicidal Ideation, Value of Life
- Abstract
Background: The present study aimed at validating the German version of the Brief Reasons for Living inventory (BRFL)., Methods: Validity and reliability were established in a community (n = 339) and a clinical sample (n = 272). Convergent and discriminant validity were investigated, and confirmatory factor analyses were conducted for the complete BRFL as well as for a 10-item version excluding conditional items on child-related concerns. Furthermore, it was assessed how BRFL scores moderate the association between depression and suicide ideation., Results: Results indicated an adequate fit of the data to the original factor structure. The total scale and the subscales of the German version of the BRFL had sufficient internal consistency, as well as good convergent and divergent validity. The BRFL demonstrated clinical utility by differentiating between participants with vs. without suicide ideation. Reasons for living proved to moderate the association between depression and suicide ideation., Conclusions: Results provide preliminary evidence that the BRFL may be a reliable and valid measure of adaptive reasons for living that can be used in clinic and research settings.
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- 2017
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29. Information order effects in clinical psychological diagnoses.
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Cwik JC and Margraf J
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- Female, Germany, Humans, Male, Middle Aged, Surveys and Questionnaires, Diagnostic Errors statistics & numerical data, Mental Disorders diagnosis, Psychotherapy statistics & numerical data
- Abstract
Despite the wide application and long history of diagnostic systems, several sources of diagnostic errors remain in the criterion-based diagnosing of mental disorders. The aim of this study was to investigate whether the presentational order of diagnosis-relevant information and pretreatment reports predict diagnostic errors. One hundred twenty psychotherapists participated in the present online study. The study employed a 2 (symptom presentation: core symptoms at vignette's beginning vs. core symptoms at the end of the case vignette) × 2 (pretreatment report: receiving a pretreatment report with an incongruent diagnosis to the case vignette vs. receiving no pretreatment report) between-subjects experimental design, with random assignment. Participants were asked to make diagnoses after reading three case vignettes describing patients with different disorder constellations. Additionally, participants rated their confidence in the diagnoses and their estimation of the severity of each diagnosed condition. Results indicated that order of symptom descriptions predicted the correctness of diagnostic decisions, with a recency effect causing more fully correct diagnostic decisions in cases where diagnostic information was presented last. Receiving incongruent pretreatment reports was predictive for diagnostic errors. In conclusion, the results of this study indicate that diagnoses of mental disorders can depend on the way symptoms are presented or reported., Key Practitioner Message: Therapists' diagnostic decisions are not influenced by pretreatment reports. Diagnostic decisions are affected by information order effects. Diagnostic accuracy of psychotherapists is debatable. High rate of misdiagnoses in case vignette with comorbid disorders., (Copyright © 2017 John Wiley & Sons, Ltd.)
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- 2017
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30. Posterior and prefrontal contributions to the development posttraumatic stress disorder symptom severity: an fMRI study of symptom provocation in acute stress disorder.
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Cwik JC, Sartory G, Nuyken M, Schürholt B, and Seitz RJ
- Subjects
- Adult, Female, Follow-Up Studies, Humans, Magnetic Resonance Imaging, Male, Parietal Lobe diagnostic imaging, Pattern Recognition, Visual physiology, Prefrontal Cortex diagnostic imaging, Severity of Illness Index, Stress Disorders, Post-Traumatic diagnostic imaging, Stress Disorders, Post-Traumatic etiology, Stress Disorders, Traumatic, Acute complications, Stress Disorders, Traumatic, Acute diagnostic imaging, Brain Mapping methods, Parietal Lobe physiopathology, Prefrontal Cortex physiopathology, Stress Disorders, Post-Traumatic physiopathology, Stress Disorders, Traumatic, Acute physiopathology
- Abstract
Acute stress disorder (ASD) is predictive of the development of posttraumatic stress disorder (PTSD). In response to symptom provocation, the exposure to trauma-related pictures, ASD patients showed increased activation of the medial posterior areas of precuneus and posterior cingulate cortex as well as of superior prefrontal cortex in a previous study. The current study aimed at investigating which activated areas are predictive of the development of PTSD. Nineteen ASD patients took part in an fMRI study in which they were shown personalized trauma-related and neutral pictures within 4 weeks of the traumatic event. They were assessed for severity of PTSD 4 weeks later. Activation contrasts between trauma-related and neutral pictures were correlated with subsequent PTSD symptom severity. Greater activation in, among others, right medial precuneus, left retrosplenial cortex, precentral and right superior temporal gyrus as well as less activation in lateral, superior prefrontal and left fusiform gyrus was related to subsequently increased PTSD severity. The results are broadly in line with neural areas related to etiological models of PTSD, namely multisensory associative learning recruiting posterior regions on the one hand and failure to reappraise maladaptive cognitions, thought to involve prefrontal areas, on the other.
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- 2017
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31. Misclassification of Self-Directed Violence.
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Cwik JC and Teismann T
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- Adult, Diagnostic Errors psychology, Female, Humans, Male, Risk Factors, Sex Factors, Surveys and Questionnaires, United States, Young Adult, Clinical Competence statistics & numerical data, Diagnostic Errors statistics & numerical data, Suicide classification
- Abstract
Background: Inconsistent nomenclature and classification of suicidal behaviour have plagued the field of suicidology for a long time. Recently, the United States Centers for Disease Control (CDC) advocated for the usage of a specific classification system. Aim of the current study was to determine the extent of misdiagnosed acts of self-directed violence-controlling for the level of expertise in psychology/psychotherapy. Additionally, the effect of gender and diagnosis on misclassifications was assessed., Method: A total of 426 participants (laypersons, psychology students, psychotherapists-in-training, licensed psychotherapists) were presented with an array of case vignettes describing different acts of self-directed violence (e.g., non-suicidal self-directed violence, suicide attempt, suicide ideation) and were asked to make a classification. Gender and given diagnosis were varied systematically in two vignettes., Results: Overall 51.6% of the cases were misclassified (according to the Self-Directed Violence Classification System). The level of expertise was almost unrelated to classification correctness. Yet, psychotherapists were more confident about their judgments. Female gender of the character described in the vignette and an ascribed diagnosis of Borderline Personality Disorder were associated with higher misclassification rates., Limitations: The validity of case vignettes is discussible., Conclusions: The results highlight the importance of more methodological and diagnostic training of psychologists regarding suicidal issues. Copyright © 2016 John Wiley & Sons, Ltd., Key Practitioner Message: Misclassification of non-suicidal and suicidal events is common. Expertise is only weakly associated with classification correctness. Misclassification of suicide attempts occurs more often in women. Misclassification of suicide attempts occurs more often in Borderline Personality Disorder. The use of standardized diagnostic tools in relation to self-directed violence is highly recommended., (Copyright © 2016 John Wiley & Sons, Ltd.)
- Published
- 2017
- Full Text
- View/download PDF
32. Overdiagnosis of mental disorders in children and adolescents (in developed countries).
- Author
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Merten EC, Cwik JC, Margraf J, and Schneider S
- Abstract
During the past 50 years, health insurance providers and national registers of mental health regularly report significant increases in the number of mental disorder diagnoses in children and adolescents. However, epidemiological studies show mixed effects of time trends of prevalence of mental disorders. Overdiagnosis in clinical practice rather than an actual increase is assumed to be the cause for this situation. We conducted a systematic literature search on the topic of overdiagnosis of mental disorders in children and adolescents. Most reviewed studies suggest that misdiagnosis does occur; however, only one study was able to examine overdiagnosis in child and adolescent mental disorders from a methodological point-of-view. This study found significant evidence of overdiagnosis of attention-deficit/hyperactivity disorder. In the second part of this paper, we summarize findings concerning diagnostician, informant and child/adolescent characteristics, as well as factors concerning diagnostic criteria and the health care system that can lead to mistakes in the routine diagnostic process resulting in misdiagnoses. These include the use of heuristics instead of data-based decisions by diagnosticians, misleading information by caregivers, ambiguity in symptom description relating to classification systems, as well as constraints in most health systems to assign a diagnosis in order to approve and reimburse treatment. To avoid misdiagnosis, standardized procedures as well as continued education of diagnosticians working with children and adolescents suffering from a mental disorder are needed.
- Published
- 2017
- Full Text
- View/download PDF
33. Measuring attitudes towards suicide: Preliminary evaluation of an attitude towards suicide scale.
- Author
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Cwik JC, Till B, Bieda A, Blackwell SE, Walter C, and Teismann T
- Subjects
- Adolescent, Adult, Aged, Female, Germany epidemiology, Humans, Male, Middle Aged, Psychometrics statistics & numerical data, Reproducibility of Results, Young Adult, Attitude, Suicide psychology, Surveys and Questionnaires standards
- Abstract
Objectives: Our study aimed to validate a previously published scale assessing attitudes towards suicide. Factor structure, convergent and discriminant validity, and predictive validity were investigated., Method: Adult German participants (N=503; mean age=24.74years; age range=18-67years) anonymously completed a set of questionnaires. An exploratory factor analysis was conducted, and incongruous items were deleted. Subsequently, scale properties of the reduced scale and its construct validity were analyzed. A confirmatory factor analysis was then conducted in an independent sample (N=266; mean age=28.77years; age range=18-88years) to further confirm the factor structure of the questionnaire., Results: Parallel analysis indicated a three-factor solution, which was also supported by confirmatory factor analysis: right to commit suicide, interpersonal gesture and resilience. The subscales demonstrated acceptable construct and discriminant validity. Cronbach's α for the subscales ranged from 0.67 to 0.83, explaining 49.70% of the total variance., Conclusions: Positive attitudes towards suicide proved to be predictive of suicide risk status, providing preliminary evidence for the utility of the scale. Future studies aiming to reproduce the factor structure in a more heterogeneous sample are warranted., (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
34. An Investigation of Diagnostic Accuracy and Confidence Associated with Diagnostic Checklists as Well as Gender Biases in Relation to Mental Disorders.
- Author
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Cwik JC, Papen F, Lemke JE, and Margraf J
- Abstract
This study examines the utility of checklists in attaining more accurate diagnoses in the context of diagnostic decision-making for mental disorders. The study also aimed to replicate results from a meta-analysis indicating that there is no association between patients' gender and misdiagnoses. To this end, 475 psychotherapists were asked to judge three case vignettes describing patients with Major Depressive Disorder (MDD), Generalized Anxiety Disorder, and Borderline Personality Disorder. Therapists were randomly assigned to experimental conditions in a 2 (diagnostic method: with using diagnostic checklists vs. without using diagnostic checklists) × 2 (gender: male vs. female case vignettes) between-subjects design. Multinomial logistic and linear regression analyses were used to examine the association between the usage of diagnostic checklists as well as patients' gender and diagnostic decisions. The results showed that when checklists were used, fewer incorrect co-morbid diagnoses were made, but clinicians were less likely to diagnose MDD even when the criteria were met. Additionally, checklists improved therapists' confidence with diagnostic decisions, but were not associated with estimations of patients' characteristics. As expected, there were no significant associations between gender and diagnostic decisions.
- Published
- 2016
- Full Text
- View/download PDF
35. Posterior Midline Activation during Symptom Provocation in Acute Stress Disorder: An fMRI Study.
- Author
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Cwik JC, Sartory G, Schürholt B, Knuppertz H, and Seitz RJ
- Abstract
Functional imaging studies of patients with post-traumatic stress disorder showed wide-spread activation of midline cortical areas during symptom provocation, i.e., exposure to trauma-related cues. The present study aimed at investigating neural activation during exposure to trauma-related pictures in patients with acute stress disorder (ASD) shortly after the traumatic event. Nineteen ASD patients and 19 healthy control participants were presented with individualized pictures of the traumatic event and emotionally neutral control pictures during the acquisition of whole-brain data with a 3-T fMRI scanner. Compared to the control group and to control pictures, ASD patients showed significant activation in midline cortical areas in response to trauma-related pictures including precuneus, cuneus, postcentral gyrus, and pre-supplementary motor area. The results suggest that the trauma-related pictures evoke emotionally salient self-referential processing in ASD patients.
- Published
- 2014
- Full Text
- View/download PDF
36. The efficacy of epidural anesthesia for endoscopic preperitoneal herniorrhaphy: a prospective study.
- Author
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Azurin DJ, Go LS, Cwik JC, and Schuricht AL
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Peritoneum, Prospective Studies, Anesthesia, Epidural, Hernia, Inguinal surgery, Laparoscopy
- Abstract
Laparoscopic herniorrhaphy has been criticized because of the need for general anesthesia. The endoscopic preperitoneal approach allows the use of epidural anesthesia, obviating the potential complications and side effects seen with general anesthesia. The purpose of this study was to determine the efficacy of epidural anesthesia for preperitoneal herniorrhaphy. Fifty-two patients underwent repair of a total of 80 hernias over a 6-month period. Thirty-six patients underwent their repairs with the use of epidural anesthesia with the goal of a T-4 sensory level. A tension-free prosthetic repair was performed in all patients. Seventeen patients had unilateral repairs and nineteen had bilateral repairs under epidural, while seven patients had unilateral repairs and nine patients had bilateral repairs under general anesthesia. There were no significant differences in patient demographics. All herniorrhaphies were electively performed on an outpatient basis by a single surgeon (A.L.S.) in a teaching setting. There were no significant differences for unilateral and bilateral repairs when type of anesthesia was compared. There was only one conversion from epidural to general anesthesia, secondary to poor sensory blockade first noticed during creation of the preperitoneal space (97% success rate). Seven patients receiving epidural anesthesia experienced pneumoperitoneum during the procedure. This did not effect the ability to perform the hernia repair successfully. There were no complications related to the epidural anesthetic. Endoscopic preperitoneal herniorrhaphy can be performed effectively under epidural anesthesia, obviating the need for general anesthesia.
- Published
- 1996
- Full Text
- View/download PDF
37. Extradural anaesthesia: choice of local anaesthetic agents.
- Author
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Lund PC, Cwik JC, and Gannon RT
- Subjects
- Bupivacaine blood, Bupivacaine pharmacology, Chemical Phenomena, Chemistry, Physical, Epinephrine, Evaluation Studies as Topic, Humans, Lethal Dose 50, Lidocaine administration & dosage, Lidocaine blood, Lidocaine pharmacology, Mepivacaine administration & dosage, Mepivacaine blood, Mepivacaine pharmacology, Prilocaine administration & dosage, Prilocaine blood, Structure-Activity Relationship, Time Factors, Anesthesia, Epidural, Anesthetics, Local blood, Anesthetics, Local cerebrospinal fluid, Anesthetics, Local pharmacology
- Published
- 1975
38. Etidocaine (Duranest): a clinical and laboratory evaluation.
- Author
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Lund PC, Cwik JC, and Gannon RT
- Subjects
- Acetanilides adverse effects, Acetanilides blood, Adjuvants, Anesthesia, Aged, Brachial Plexus drug effects, Bupivacaine, Chromatography, Gas, Depression, Chemical, Dose-Response Relationship, Drug, Drug Evaluation, Epinephrine, Female, Humans, Hypotension chemically induced, Male, Middle Aged, Motor Neurons drug effects, Seizures chemically induced, Sensation drug effects, Time Factors, Acetanilides analogs & derivatives, Anesthetics, Local administration & dosage, Nerve Block
- Published
- 1974
- Full Text
- View/download PDF
39. Etidocaine for Caesarean section--effects on mother and baby.
- Author
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Lund PC, Cwik JC, Gannon RT, and Vassallo HG
- Subjects
- Apgar Score, Female, Humans, Pregnancy, Time Factors, Acetanilides analogs & derivatives, Anesthesia, Epidural, Anesthesia, Obstetrical, Cesarean Section, Etidocaine blood, Infant, Newborn
- Abstract
The effectiveness and safety of etidocaine during extradural anaesthesia for Caesarean section were evaluated in 81 patients. Adequate sensory analgesia occurred in 78 patients and muscle relaxation was excellent in all patients. The combined umbilical venous-umbilical arterial/maternal venous ratio was 0.28+/-0.2 following the administration of 1% etidocaine 25 ml with adrenaline and 0.38+/-0.2 following the administration of 1% etidocaine plain 25 ml. Neurobehavioural patterns of the newborn were not affected noticeably. Etidocaine, in appropriate dose and concentration, appears to be an excellent local anaesthetic agent for Caesarean section under extradural anaesthesia.
- Published
- 1977
- Full Text
- View/download PDF
40. PROPITOCAINE (CITANEST) AND METHEMOGLOBINEMIA.
- Author
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LUND PC and CWIK JC
- Subjects
- Anesthetics, Anesthetics, Local, Methemoglobinemia, Prilocaine, Toxicology
- Published
- 1965
- Full Text
- View/download PDF
41. A correlation of the differential penetration and the systemic toxicity of lidocaine, mepivacaine and prilocaine in man.
- Author
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Lund PC and Cwik JC
- Subjects
- Biological Transport drug effects, Epinephrine pharmacology, Humans, Lidocaine blood, Lidocaine cerebrospinal fluid, Mepivacaine blood, Mepivacaine cerebrospinal fluid, Prilocaine blood, Prilocaine cerebrospinal fluid, Lidocaine toxicity, Mepivacaine toxicity, Permeability, Prilocaine toxicity
- Published
- 1966
- Full Text
- View/download PDF
42. Experiences with epidural anesthesia: 7730 cases. 2.
- Author
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LUND PC, CWIK JC, and QUINN JR
- Subjects
- Humans, Anesthesia, Anesthesia, Epidural, Anesthesia, Spinal, Anesthesiology
- Published
- 1961
43. Peridural analgesia in surgery and therapeutics.
- Author
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LUND PC, CWIK JC, and MAGAZINER R
- Subjects
- Analgesia, Anesthesia, Anesthesia, Spinal, Pain Management
- Published
- 1956
44. Citanest...a clinical and laboratory study. 1.
- Author
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Lund PC and Cwik JC
- Subjects
- Humans, Anesthesia, Conduction, Anesthesia, Spinal, Anesthetics, Local, Autonomic Nerve Block, Lidocaine
- Published
- 1965
45. Bupivacaine--a new long-acting local anesthetic agent. A preliminary clinical and laboratory report.
- Author
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Lund PC, Cwik JC, and Vallesteros F
- Subjects
- Analgesia, Anesthesia, Spinal, Anesthetics, Local, Anilides adverse effects, Anilides pharmacology, Anilides therapeutic use, Brachial Plexus, Cauda Equina, Chemical Phenomena, Chemistry, Physical, Humans, Hypotension chemically induced, Pipecolic Acids adverse effects, Pipecolic Acids pharmacology, Pipecolic Acids standards, Pipecolic Acids therapeutic use, Time Factors, Anilides standards
- Published
- 1970
46. Epidural anesthesia in general surgery.
- Author
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LUND PC, CWIK JC, and MAGAZINER R
- Subjects
- Humans, Anesthesia, Epidural, Anesthesia, Spinal, Anesthetics, Anesthetics, Local
- Published
- 1956
- Full Text
- View/download PDF
47. Experiences with epidural anesthesia: 7730 cases. I.
- Author
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LUND PC, CWIK JC, and QUINN JR
- Subjects
- Humans, Anesthesia, Anesthesia, Epidural, Anesthesia, Spinal, Anesthesiology
- Published
- 1961
48. An evaluation of epidural analgesia in geriatic surgery.
- Author
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LUND PC, CWIK JC, and QUINN JR
- Subjects
- Aged surgery, Humans, Analgesia, Epidural, Anesthesia, Spinal
- Published
- 1958
49. The role of peridural blocks in the pain clinic.
- Author
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Lund PC and Cwik JC
- Subjects
- Anuria therapy, Arterial Occlusive Diseases therapy, Cardiovascular Diseases therapy, Causalgia therapy, Dura Mater, Edema therapy, Humans, Neuralgia therapy, Neuritis therapy, Raynaud Disease therapy, Reflex Sympathetic Dystrophy therapy, Thrombophlebitis therapy, Nerve Block, Pain Management
- Published
- 1973
50. Citanest, a clinical and laboratory study.
- Author
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Lund PC and Cwik JC
- Subjects
- Anesthesia, Conduction adverse effects, Clinical Trials as Topic, Humans, Lidocaine pharmacology, Male, Middle Aged, Spectrum Analysis, Anesthetics, Local adverse effects, Anesthetics, Local pharmacology, Cyanosis etiology, Methemoglobinemia etiology
- Published
- 1965
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