Attentional bias in German Armed Forces veterans with and without posttraumatic stress symptoms - An eye-tracking investigation and group comparison.

BACKGROUND AND OBJECTIVES: Most eye tracking based paradigms evidence patterns of sustained attention on threat coupled with low evidence for vigilance to or avoidance of threat in posttraumatic stress symptoms (PTSS). Still, eye tracking data on attention bias is particularly limited for military population. This eye tracking study investigated attentional bias in PTSS in a sample of German Armed Forces veterans. METHODS: Veterans with deployment-related PTSS (N = 24), veterans with deployment-related traumatization without PTSS (N = 28), and never-deployed healthy veterans (N = 18) were presented with pairs of combat and neutral pictures, pairs of general threat and neutral pictures, and pairs of emotional and neutral faces. Their eye gazes were tracked during a free viewing task. 3 x 3 x 2 mixed general linear model analyses were conducted. Internal consistency of attention bias indicators was calculated for the entire sample and within groups. RESULTS: Veterans with PTSS dwelled longer on general threat AOIs in contrast to non-exposed controls and shorter on general threat and combat associated neutral AOIs in contrast to both control groups. Veterans with PTSS entered faster to general threat AOIs than non-exposed controls. Veterans with PTSS showed circumscribed higher attention fluctuation in contrast to controls. Internal consistency varied across attention bias indicators. LIMITATIONS: Statistical power was reduced due to recruitment difficulties. CONCLUSIONS: Evidence is provided for the maintenance hypothesis in PTSS. No robust evidence is provided for hypervigilant behavior in PTSS. Findings on attention bias variability remain unclear, calling for more investigations in this field.

Associations between oxytocin and vasopressin concentrations, traumatic event exposure and posttraumatic stress disorder symptoms: group comparisons, correlations, and courses during an internet-based cognitive-behavioural treatment.

Background: Posttraumatic stress disorder (PTSD) is characterized by impairments in extinction learning and social behaviour, which are targeted by trauma-focused cognitive behavioural treatment (TF-CBT). The biological underpinnings of TF-CBT can be better understood by adding biomarkers to the clinical evaluation of interventions. Due to their involvement in social functioning and fear processing, oxytocin and arginine vasopressin might be informative biomarkers for TF-CBT, but to date, this has never been tested. Objective: To differentiate the impact of traumatic event exposure and PTSD symptoms on blood oxytocin and vasopressin concentrations. Further, to describe courses of PTSD symptoms, oxytocin and vasopressin during an internet-based TF-CBT and explore interactions between these parameters. Method: We compared oxytocin and vasopressin between three groups of active and former male service members of the German Armed Forces (n = 100): PTSD patients (n = 39), deployed healthy controls who experienced a deployment-related traumatic event (n = 33) and non-deployed healthy controls who never experienced a traumatic event (n = 28). PTSD patients underwent a 5-week internet-based TF-CBT. We correlated PTSD symptoms with oxytocin and vasopressin before treatment onset. Further, we analysed courses of PTSD symptoms, oxytocin and vasopressin from pre- to post-treatment and 3 months follow-up, as well as interactions between the three parameters. Results: Oxytocin and vasopressin did not differ between the groups and were unrelated to PTSD symptoms. PTSD symptoms were highly stable over time, whereas the endocrine parameters were not, and they also did not change in mean. Oxytocin and vasopressin were not associated with PTSD symptoms longitudinally. Conclusions: Mainly due to their insufficient intraindividual stability, single measurements of endogenous oxytocin and vasopressin concentrations are not informative biomarkers for TF-CBT. We discuss how the stability of these biomarkers might be increased and how they could be better related to the specific impairments targeted by TF-CBT.

Antecedentes: El trastorno de estrés postraumático (TEPT) se caracteriza por deficiencias en el aprendizaje de extinción y el comportamiento social, que son el objetivo del tratamiento cognitivo conductual centrado en el trauma (TF-CBT). Los fundamentos biológicos de TF-CBT se pueden entender mejor agregando biomarcadores a la evaluación clínica de las intervenciones. Debido a su participación en el funcionamiento social y el procesamiento del miedo, la oxitocina y la arginina vasopresina podrían ser biomarcadores informativos para la TF-CBT, pero hasta la fecha, esto nunca se ha probado.Objetivo: Diferenciar el impacto de la exposición a un evento traumático y los síntomas del TEPT en las concentraciones de oxitocina y vasopresina en la sangre. Además, para describir la evolución de los síntomas del TEPT, la oxitocina y la vasopresina durante una TF-CBT basada en Internet y explorar las interacciones entre estos parámetros.Método: Comparamos la oxitocina y la vasopresina entre tres grupos de militares activos y ex militares de las Fuerzas Armadas Alemanas (n = 100): pacientes con TEPT (n = 39), controles sanos desplegados que experimentaron un evento traumático relacionado con el despliegue (n = 33) y controles sanos no desplegados que nunca experimentaron un evento traumático (n = 28). Los pacientes con TEPT se sometieron a una TF-CBT basada en Internet durante 5 semanas. Correlacionamos los síntomas del TEPT con la oxitocina y la vasopresina antes del inicio del tratamiento. Además, analizamos la evolución de los síntomas del TEPT, la oxitocina y la vasopresina antes y después del tratamiento y el seguimiento de 3 meses, así como las interacciones entre los tres parámetros.Resultados: La oxitocina y la vasopresina no difirieron entre los grupos y no se relacionaron con los síntomas del TEPT. Los síntomas del TEPT fueron muy estables en el tiempo, mientras que los parámetros endocrinos no lo fueron, y tampoco cambiaron en la media. La oxitocina y la vasopresina no se asociaron con los síntomas del TEPT de forma longitudinal.Conclusiones: Principalmente debido a su estabilidad intraindividual insuficiente, las mediciones únicas de las concentraciones de oxitocina y vasopresina endógenas no son biomarcadores informativos para TF-CBT. Discutimos cómo podría aumentarse la estabilidad de estos biomarcadores y cómo podrían relacionarse mejor con las deficiencias específicas a las que se dirige TF-CBT.

Evaluation of an internet-based intervention for service members of the German armed forces with deployment-related posttraumatic stress symptoms.

BACKGROUND: The present study was designed to evaluate the efficacy of a therapist-guided internet-based cognitive-behavioral therapy (iCBT) intervention for service members of the German Armed Forces with posttraumatic stress disorder (PTSD). The iCBT was adapted from Interapy, a trauma-focused evidence-based treatment based on prolonged exposure and cognitive restructuring. It lasted for 5 weeks and included 10 writing assignments (twice a week). The program included a reminder function if assignments were overdue, but no multimedia elements. Therapeutic written feedback was provided asynchronously within one working day. METHODS: Male active and former military service members were recruited from the German Armed Forces. Diagnoses were assessed with the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) and the Mini-International Neuropsychiatric Interview. Psychopathology was assessed at pre-treatment, post-treatment, and 3-month follow-up. Severity of PTSD was the primary outcome and anxiety was the secondary outcome. Participants were randomly allocated to a treatment group that received iCBT immediately or to a waitlist group that received iCBT after 6 weeks. Due to the overall small sample size (n = 37), the two groups were collapsed for the statistical analyses. Change during the intervention period was investigated using latent-change score models. RESULTS: Improvements in the CAPS-5 were small and not statistically significant. For anxiety, small significant improvements were observed from pre- to follow-up assessment. The dropout rate was 32.3%. CONCLUSIONS: The low treatment utilization and the high dropout rate are in line with previous findings on treatment of service members. The interpretation of the current null results for the efficacy of iCBT is limited due to the small sample size, however for military samples effect estimates were also smaller in other recent studies. Our results demonstrate the need to identify factors influencing treatment engagement and efficacy in veterans. TRIAL REGISTRATION: Australian Clinical Trials Registry ACTRN12616000956404.

Comparison of DSM-5 and proposed ICD-11 criteria for PTSD with DSM-IV and ICD-10: changes in PTSD prevalence in military personnel.

Background: Recently, changes have been introduced to the diagnostic criteria for posttraumatic stress disorder (PTSD) according to the Diagnostic and Statistical Manual of Mental Disorders (DSM) and the International Classification of Diseases (ICD). Objectives:This study investigated the effect of the diagnostic changes made from DSM-IV to DSM-5 and from ICD-10 to the proposed ICD-11. The concordance of provisional PTSD prevalence between the diagnostic criteria was examined in a convenience sample of 100 members of the German Armed Forces. Method: Based on questionnaire measurements, provisional PTSD prevalence was assessed according to DSM-IV, DSM-5, ICD-10, and proposed ICD-11 criteria. Consistency of the diagnostic status across the diagnostic systems was statistically evaluated. Results: Provisional PTSD prevalence was the same for DSM-IV and DSM-5 (both 56%) and comparable under DSM-5 versus ICD-11 proposal (48%). Agreement between DSM-IV and DSM-5, and between DSM-5 and the proposed ICD-11, was high (both p < .001). Provisional PTSD prevalence was significantly increased under ICD-11 proposal compared to ICD-10 (30%) which was mainly due to the deletion of the time criterion. Agreement between ICD-10 and the proposed ICD-11 was low (p = .014). Conclusion: This study provides preliminary evidence for a satisfactory concordance between provisional PTSD prevalence based on the diagnostic criteria for PTSD that are defined using DSM-IV, DSM-5, and proposed ICD-11. This supports the assumption of a set of PTSD core symptoms as suggested in the ICD-11 proposal, when at the same time a satisfactory concordance between ICD-11 proposal and DSM was given. The finding of increased provisional PTSD prevalence under ICD-11 proposal in contrast to ICD-10 can be of guidance for future epidemiological research on PTSD prevalence, especially concerning further investigations on the impact, appropriateness, and usefulness of the time criterion included in ICD-10 versus the consequences of its deletion as proposed for ICD-11.

Planteamiento. Recientemente, se han introducido cambios en los criterios diagnósticos para el trastorno por estrés postraumático (TEPT) según el Manual Diagnóstico y Estadístico de los Trastornos Mentales (DSM) y la Clasificación Internacional de Enfermedades (CIE).Objetivos. Este estudio investigó el efecto de los cambios diagnósticos realizados del DSM-IV al DSM-5 y de la CIE-10 a la propuesta de la CIE-11. La concordancia de la prevalencia provisional del TEPT entre los criterios diagnósticos se examinó en una muestra de conveniencia de 100 miembros de las Fuerzas Armadas alemanas. Método. Basándose en mediciones de cuestionarios, la prevalencia provisional del TEPT se evaluó de acuerdo con el DSM-IV, el DSM-5, la CIE-10 y los criterios propuestos por la CIE-11. Se evaluó estadísticamente la consistencia del estado diagnóstico en todos los sistemas de diagnóstico. Resultados. La prevalencia provisional del TEPT fue la misma para el DSM-IV y el  DSM-5 (56%), y comparable en DSM-5 frente a la propuesta de la CIE-11 (48%), y el grado de acuerdo entre el DSM-IV y el DSM-5 y entre el DSM-5 y la propuesta de la CIE-11 fue alto (ambos p <0,001). La prevalencia provisional del TEPT aumentó significativamente en la propuesta de la CIE-11 en comparación con la CIE-10 (30%), debido principalmente a la supresión del criterio de tiempo. El grado de acuerdo entre la CIE-10 y la propuesta de la CIE-11 fue bajo (p = 0,014). Conclusión. Este estudio proporciona evidencia preliminar de una concordancia satisfactoria entre la prevalencia provisional del TEPT basada en los criterios diagnósticos para el TEPT que se definen usando el DSM-IV, el DSM-5 y la propuesta de la CIE-11. Esto apoya que se asuman un conjunto de síntomas centrales del TEPT como se sugiere en la propuesta de la CIE-11, cuando al mismo tiempo se daba una concordancia satisfactoria entre la propuesta de la CIE-11 y el DSM. El hallazgo de un aumento de la prevalencia provisional de TEPT en la propuesta de la CIE-11 en contraste con la CIE-10 puede ser una guía para futuras investigaciones epidemiológicas sobre la prevalencia del TEPT, especialmente en relación con investigaciones adicionales sobre el impacto, la idoneidad y la utilidad del criterio de tiempo incluido en la CIE-10 frente a las consecuencias de su supresión, como se propone para la CIE-11.

Internet-based interventions for posttraumatic stress: A meta-analysis of randomized controlled trials.

Posttraumatic stress disorder (PTSD) is a prevalent and highly distressing affliction, but access to trauma-focused psychotherapy is limited. Internet-based interventions (IBIs) could improve the delivery of and access to specialized mental health care. Currently, no meta-analytical evidence is available on IBIs for PTSD. We conducted a meta-analysis of 20 randomized controlled studies, including 21 comparisons, in order to summarize the current state of efficacy for the treatment of PTSD and to identify moderator variables. Studies tested internet-based cognitive behavioral therapy (CBT) and expressive writing (EW) against active or passive comparison conditions, including subclinical and clinical samples. Results show that at post-assessment CBT-IBIs are significantly more efficacious than passive controls, resulting in medium to large effects on the PTSD sum and all sub-symptom scores (0.66