Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Mirjam J. Nijdam is active.

Publication


Featured researches published by Mirjam J. Nijdam.


British Journal of Psychiatry | 2012

Brief eclectic psychotherapy v. eye movement desensitisation and reprocessing therapy for post-traumatic stress disorder: randomised controlled trial

Mirjam J. Nijdam; Berthold P. R. Gersons; Johannes B. Reitsma; Ad de Jongh; Miranda Olff

BACKGROUND Trauma-focused cognitive-behavioural therapy (CBT) and eye movement desensitisation and reprocessing therapy (EMDR) are efficacious treatments for post-traumatic stress disorder (PTSD), but few studies have directly compared them using well-powered designs and few have investigated response patterns. AIMS To compare the efficacy and response pattern of a trauma-focused CBT modality, brief eclectic psychotherapy for PTSD, with EMDR (trial registration: ISRCTN64872147). METHOD Out-patients with PTSD were randomly assigned to brief eclectic psychotherapy (n = 70) or EMDR (n = 70) and assessed at all sessions on self-reported PTSD (Impact of Event Scale - Revised). Other outcomes were clinician-rated PTSD, anxiety and depression. RESULTS Both treatments were equally effective in reducing PTSD symptom severity, but the response pattern indicated that EMDR led to a significantly sharper decline in PTSD symptoms than brief eclectic psychotherapy, with similar drop-out rates (EMDR: n = 20 (29%), brief eclectic psychotherapy: n = 25 (36%)). Other outcome measures confirmed this pattern of results. CONCLUSIONS Although both treatments are effective, EMDR results in a faster recovery compared with the more gradual improvement with brief eclectic psychotherapy.


Journal of Affective Disorders | 2015

Dexamethasone-suppressed cortisol awakening response predicts treatment outcome in posttraumatic stress disorder

Mirjam J. Nijdam; J.G.C. van Amsterdam; Berthold P. R. Gersons; Miranda Olff

BACKGROUND Posttraumatic stress disorder (PTSD) has been associated with several alterations in the neuroendocrine system, including enhanced cortisol suppression in response to the dexamethasone suppression test. The aim of this study was to examine whether specific biomarkers of PTSD predict treatment success in trauma-focused psychotherapy. METHODS Data were collected in the context of a randomized controlled trial comparing two forms of trauma-focused psychotherapy. Basal cortisol and dehydroepiandrosterone sulfate levels, and the response to the dexamethasone suppression test were assessed pre-treatment in 24 PTSD patients. Treatment success was measured by pre- to post-treatment decrease in self-reported PTSD severity. RESULTS A more suppressed cortisol curve after dexamethasone significantly predicted greater PTSD symptom decrease in trauma-focused psychotherapy, independent of the effects of gender, pre-treatment PTSD symptom severity, and trauma history. Basal early morning cortisol and dehydroepiandrosterone sulfate did not predict treatment response. LIMITATIONS The number of participants who completed the neuroendocrine measurements was small and a significant number of participants fulfilled criteria of co-morbid major depressive disorder. CONCLUSIONS This study suggests the use of the dexamethasone-suppression test for the cortisol awakening response as a biomarker for treatment response to trauma-focused psychotherapy. Measures of HPA-axis sensitivity appear to be an important predictor of positive clinical response in PTSD patients, and may lead to biomarker-based treatment matching in the future.


European Journal of Psychotraumatology | 2013

The role of major depression in neurocognitive functioning in patients with posttraumatic stress disorder

Mirjam J. Nijdam; Berthold P. R. Gersons; Miranda Olff

Background Posttraumatic stress disorder (PTSD) and major depressive disorder (MDD) frequently co-occur after traumatic experiences and share neurocognitive disturbances in verbal memory and executive functioning. However, few attempts have been made to systematically assess the role of a comorbid MDD diagnosis in neuropsychological studies in PTSD. Objective The purpose of the current study is to investigate neurocognitive deficits in PTSD patients with and without MDD. We hypothesized that PTSD patients with comorbid MDD (PTSD+MDD) would have significantly lower performance on measures of verbal memory and executive functioning than PTSD patients without MDD (PTSD–MDD). Method Participants included in this study were 140 treatment-seeking outpatients who had a diagnosis of PTSD after various single traumatic events and participated in a randomized controlled trial comparing different treatment types. Baseline neuropsychological data were compared between patients with PTSD+MDD (n=84) and patients with PTSD–MDD (n=56). Results The PTSD+MDD patients had more severe verbal memory deficits in learning and retrieving words than patients with PTSD alone. There were no differences between the groups in recall of a coherent paragraph, recognition, shifting of attention, and cognitive interference. Conclusions The results of this study suggest that a more impaired neurocognitive profile may be associated with the presence of comorbid MDD, with medium-sized group differences for verbal memory but not for executive functioning. From a clinical standpoint, being aware that certain verbal memory functions are more restricted in patients with comorbid PTSD and MDD may be relevant for treatment outcome of trauma-focused psychotherapy.


Journal of Psychiatric Research | 2017

Mental health stigma and barriers to mental health care for first responders: A systematic review and meta-analysis

Peter T. Haugen; Aileen McCrillis; Geert E. Smid; Mirjam J. Nijdam

OBJECTIVE It is unclear how many first responders experience barriers to care and stigma regarding mental health care, and how this influences their help-seeking. A systematic review and meta-analysis was conducted on barriers to care and mental health stigma in first responders and their empirical relationship with psychosocial and psychiatric variables. METHODS The databases Medline, Embase PsycINFO, CINAHL, PILOTS, LILACS, Sociological Abstracts, SocINDEX, and Social Citation Index were searched to identify relevant studies. A quality assessment and meta-analysis was performed. RESULTS Fourteen articles met inclusion criteria, from which data from 12 samples were extracted for meta-analyses. All studies measured stigma regarding mental health care and 33.1% of first responders (95% CI 26.7-40.1; 12 individual samples) endorsed stigma items. The systematic review revealed that the most frequently endorsed items were fears regarding confidentiality and negative career impact. Five of 14 studies measured barriers to mental health care and 9.3% of first responders (95% CI 7.0-12.3; 4 individual samples) endorsed barriers to care items. The most frequently endorsed barriers were scheduling concerns and not knowing where to get help. Indications were found for more stigma and barriers in individuals with mental health problems. CONCLUSIONS Stigma and barriers to care are experienced by a significant proportion of firs responders, which can potentially lead to delayed presentation in mental health care and therefore, increased risk of chronicity of post-trauma psychopathology for these groups. The current systematic review draws attention to the paucity of research in this area, particularly in non-Western samples.


European Journal of Psychotraumatology | 2016

Erasing memory traces of trauma with eye movement desensitization and reprocessing therapy

Mirjam J. Nijdam; Miranda Olff

No abstract available. (Published: 4 July 2016) This paper is part of the Special Issue: Eye Movement Desensitization and Reprocessing therapy research . More papers from this issue can be found at www.ejpt.net Citation: European Journal of Psychotraumatology 2016, 7 : 32545 - http://dx.doi.org/10.3402/ejpt.v7.32545


Evidence Based Treatments for Trauma-Related Psychological Disorders : A Practical Guide for Clinicians | 2015

Brief Eclectic Psychotherapy for PTSD

Berthold P. R. Gersons; Marie-Louise Meewisse; Mirjam J. Nijdam

Brief eclectic psychotherapy for PTSD (BEPP), developed during the 1980s and 1990s of the last century, has proven to be as effective as other trauma-focused treatments (Gersons et al. 2000; Lindauer et al. 2005; Bradley et al. 2005; NICE 2005; Bisson et al. 2013; Schnyder et al. 2011). What makes BEPP special is that it is a comprehensive treatment especially developed for PTSD in which effective elements from different psychotherapy schools have been integrated into a logical sequence. In contrast to other trauma-focused treatments, BEPP focuses on the expression of strong emotions like sorrow and anger which stem from the traumatic event and on learning from the way the event has changed someone’s life. Some trauma-focused treatments disregard that the losses of trauma bring forth a lasting change and therefore seem to give the message that the patient will be the same as before the trauma, whereas the message in BEPP is that one becomes “sadder and wiser” and finds a new equilibrium with the surrounding world. BEPP is structured and delivered in 16 sessions.


European Journal of Psychotraumatology | 2018

A five-day inpatient EMDR treatment programme for PTSD: pilot study

Mayaris Zepeda Méndez; Mirjam J. Nijdam; F. Jackie June ter Heide; Niels van der Aa; Miranda Olff

ABSTRACT Background: Trauma-focused psychotherapies for posttraumatic stress disorder (PTSD) have been demonstrated to be efficacious, but also have considerable non-response and dropout rates. Intensive treatment may lead to faster symptom reduction, which may contribute to treatment motivation and thereby to reduction of dropout. Objective: The aim of the current study was to investigate the feasibility and preliminary effectiveness of an intensive five-day inpatient treatment with Eye Movement Desensitization and Reprocessing (EMDR) and trauma-informed yoga for patients with PTSD. Method: A non-controlled pilot study with 12 adult patients with PTSD was conducted. At baseline the PTSD diagnosis was assessed with the Clinician-Administered PTSD Scale (CAPS-5) and comorbid disorders with the Mini International Neuropsychiatric Interview (MINI). Primary outcome was self-reported PTSD symptom severity (PTSD Check List for DSM-5; PCL-5) measured at the beginning of day 1 (T1), at the end of day 5 (T2) and at follow-up on day 21 (T3). Reliable change indexes (RCI) and clinically significant changes were calculated. Results: From T1 to T3, PTSD symptoms significantly improved with a large effect size (Cohen’s d = 0.91). Nine of the 11 patients who completed treatment showed reliable changes in terms of self-reported PTSD. At T3, two of the patients no longer met criteria for PTSD as measured with the PCL-5. One patient dropped out after the first day. No serious adverse events occurred. Conclusions: The majority of patients in our pilot study experienced symptom reduction consistent with reliable changes in this five-day inpatient treatment with EMDR and yoga. Randomized controlled trials – with longer follow up periods – are needed to properly determine efficacy and efficiency of intensive clinical treatments for PTSD compared to regular treatment. This is one of the first studies to show that intensive EMDR treatment is feasible and is indicative of reliable improvement in PTSD symptoms in a very short time frame.


European Journal of Psychotraumatology | 2013

Treatment of sexual trauma dissolves contamination fear: case report

Mirjam J. Nijdam; Marthe M. van der Pol; Ron E. Dekens; Miranda Olff; Damiaan Denys

Background: In patients with co-morbid obsessive–compulsive disorder (OCD) and posttraumatic stress disorder (PTSD), repetitive behavior patterns, rituals, and compulsions may ward off anxiety and often function as a coping strategy to control reminders of traumatic events. Therefore, addressing the traumatic event may be crucial for successful treatment of these symptoms. Objective: In this case report, we describe a patient with comorbid OCD and PTSD who underwent pharmacotherapy and psychotherapy. Methods: Case Report. A 49-year-old Dutch man was treated for severe PTSD and moderately severe OCD resulting from anal rape in his youth by an unknown adult man. Results: The patient was treated with paroxetine (60 mg), followed by nine psychotherapy sessions in which eye movement desensitization and reprocessing (EMDR) and exposure and response prevention (ERP) techniques were applied. During psychotherapy, remission of the PTSD symptoms preceded remission of the OCD symptoms. Conclusions: This study supports the idea of a functional connection between PTSD and OCD. Successfully processing the trauma results in diminished anxiety associated with trauma reminders and subsequently decreases the need for obsessive–compulsive symptoms. For the abstract or full text in other languages, please see Supplementary files under Reading Tools online


Journal of Traumatic Stress | 2018

Predictors of Outcome and Residual Symptoms Following Trauma-Focused Psychotherapy in Police Officers With Posttraumatic Stress Disorder: Predicting PTSD Treatment Outcome in the Police

Geert E. Smid; Christianne A.I. van der Meer; Miranda Olff; Mirjam J. Nijdam

Police officers exposed to potentially traumatic events (PTE) are at a heightened risk of developing posttraumatic stress disorder (PTSD). Little is known about trauma-focused psychotherapy outcomes in the police. In this naturalistic study, we evaluated whether PTE exposure and baseline clinical characteristics predicted PTSD symptom reduction during treatment and residual PTSD symptoms posttreatment. In consecutive referrals to a specialized mental health service for police officers (N = 665), PTSD was measured pre- and posttreatment using structured clinical interviews. Treatment consisted of brief eclectic psychotherapy for PTSD. We grouped PTE as follows: injury/maltreatment, loss (colleague or private), other job-related, other private traumatic events. Data were analyzed multivariably using structural equation modeling and logistic regression. Treatment effect size was large, d = 3.6, 95% CI [3.4, 3.8]. Police officers who reported more injury/maltreatment or private traumatic had more baseline PTSD symptoms as well as larger symptom reduction during treatment; police officers who reported more losses of loved ones showed smaller PTSD symptom reduction. Concentration problems persisted in 17.7% of police officers posttreatment, and these were predicted by baseline PTSD symptoms and loss of loved ones. Proportions of variance explained by the multivariable models ranged from 0.08 to 0.14. Our findings increase insight into the type of PTE and clinical characteristics of police officers with PTSD who benefit most from trauma-focused treatment. Because loss of loved ones can be presumed to have a profound impact on social and interpersonal functioning, a more specific treatment focus on grief processes may further enhance efficacy.


Journal of Affective Disorders | 2018

Turning wounds into wisdom: Posttraumatic growth over the course of two types of trauma-focused psychotherapy in patients with PTSD

Mirjam J. Nijdam; Christianne A.I. van der Meer; Mirjam van Zuiden; Pasha Dashtgard; Daniël Medema; Yulan Qing; Paul Zhutovsky; Anne Bakker; Miranda Olff

BACKGROUND Treatment studies in PTSD patients have mostly focused on adverse psychopathological outcomes whereas positive outcomes have received less attention. Objectives of this study were to investigate posttraumatic growth in response to two different psychotherapies, to examine the relationship between symptom improvement and growth, and to determine if posttraumatic growth predicted treatment response. METHODS Outpatients diagnosed with PTSD after various types of trauma (n = 116) participated in a randomized controlled trial that compared Brief Eclectic Psychotherapy for PTSD (BEP) and Eye Movement Desensitization and Reprocessing therapy (EMDR). Posttraumatic growth was assessed pre- and post-treatment. PTSD severity was measured weekly. RESULTS Posttraumatic growth scores significantly increased after trauma-focused psychotherapy, as well as scores in the subdomains personal strength, new possibilities, relating to others, and appreciation of life. Greater self-reported and clinician-rated PTSD decline was significantly related to greater increase in posttraumatic growth. No changes were found between treatment conditions, except for a stronger correlation between PTSD symptom decrease and increase in relating to others in BEP as compared to EMDR. No predictive effects were found. LIMITATIONS We were unable to control for time effects because for ethical reasons, no control group not receiving treatment was included, and the stability of the changes could not be determined. CONCLUSIONS Findings indicate that increases in posttraumatic growth accompany symptom decline in EMDR and BEP, and that these changes occur independent of whether the treatment specifically addresses posttraumatic growth as therapeutic process. Further research is encouraged to disentangle the contribution of therapeutic elements to growth.

Collaboration


Dive into the Mirjam J. Nijdam's collaboration.

Top Co-Authors

Avatar

Miranda Olff

University of Amsterdam

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

W.F. Hofman

University of Amsterdam

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Eric Vermetten

United Kingdom Ministry of Defence

View shared research outputs
Top Co-Authors

Avatar

A. de Jongh

Academic Center for Dentistry Amsterdam

View shared research outputs
Researchain Logo
Decentralizing Knowledge