Trauma and conditional risk of posttraumatic stress disorder in two American Indian reservation communities

Purpose

To determine conditional risk of posttraumatic stress disorder (PTSD) in two culturally distinct American Indian reservation communities.

Method

Data derived from the American Indian Service Utilization, Psychiatric Epidemiology, Risk and Protective Factors Project, a cross-sectional population-based survey that was completed between 1997 and 2000. This study focused on 1,967 participants meeting the DSM-IV criteria for trauma exposure. Traumas were grouped into interpersonal, non-interpersonal, witnessed, and “trauma to close others” categories. Analyses examined distribution of worst traumas, conditional rates of PTSD following exposure, and distributions of PTSD cases deriving from these events. Bivariate and multivariate logistic regressions estimated associations of lifetime PTSD with trauma type.

Results

Overall, 15.9 % of those exposed to DSM-IV trauma qualified for lifetime PTSD, a rate comparable to similar US studies. Women were more likely to develop PTSD than were men. The majority (60 %) of cases of PTSD among women derived from interpersonal trauma exposure (in particular, sexual and physical abuse); among men, cases were more evenly distributed across trauma categories.

Conclusions

Previous research has demonstrated higher rates of both trauma exposure and PTSD in American Indian samples compared to other Americans. This study shows that conditional rates of PTSD are similar to those reported elsewhere, suggesting that the elevated prevalence of this disorder in American Indian populations is largely due to higher rates of trauma exposure.     

Trauma and post-traumatic stress disorder among homeless adults in Sydney

OBJECTIVE: International studies indicate high prevalence rates of post-traumatic stress disorder within homeless populations. In Australia, studies indicate high rates of trauma among homeless adults, yet post-traumatic stress disorder has not been investigated in homeless Australian adults. The primary aim of this project was to determine the prevalence of post-traumatic stress disorder among homeless adults in Sydney. Further, another aim of the study was to determine whether the onset of post-traumatic stress disorder preceded the first episode of homelessness or was a consequence of homelessness. METHOD: The sample consisted of 70 homeless men and women aged 18-73 years, who were randomly sampled through eight homeless services. A computer-assisted face-to-face structured clinical interview was conducted with each participant. Lifetime prevalence of post-traumatic stress disorder was determined via the Composite International Diagnostic Interview. RESULTS: The majority of the sample had experienced at least one traumatic event in their lifetime (98%). Indeed, the mean number of traumas per person was six. The 12 month prevalence of post-traumatic stress disorder was higher among homeless adults in Sydney in comparison to the Australian general population (41% vs 1.5%). But 79% of the sample had a lifetime prevalence of post-traumatic stress. In 59% of cases, the onset of post-traumatic stress disorder preceded the age of the first reported homeless episode. CONCLUSIONS: Homeless adults in Sydney frequently experience trauma and post-traumatic stress disorder. The study found that trauma and post-traumatic stress disorder more often precede homelessness, but re-victimization is common. These findings highlight the high mental health needs among homeless people and have implications for services for homeless people.     

Sexually abused children at high risk for post-traumatic stress disorder.

Ninety-two sexually abused children were studied using structured interviews and standardized instruments to determine the frequency of post-traumatic stress disorder (PTSD) and associated symptoms. Of these sexually abused children, 43.9% met DSM-III-R PTSD criteria; 53.8% of children abused by fathers, 42.4% abused by trusted adults, and 10% of those abused by strangers met criteria as opposed to none of the children abused by an older child. No relationship was observed between the time lapsed since last abusive episode and the presence of PTSD. Many children not meeting full criteria exhibited partial PTSD symptoms. Only one standardized instrument (Child Behavior Checklist) detected group differences with PTSD children exhibiting more symptoms. This study replicates an earlier pilot study and underscores the need for further PTSD research.     

Psychophysiology of post-traumatic stress disorder.

In general, the results of psychophysiologic research on PTSD support the presence of a variety of autonomic, sensory, and cognitive processing differences between individuals with and without the disorder. The findings are diverse and include heightened responsiveness to trauma reminders; exaggerated startle; increased conditionability and autonomic responsiveness to aversive, high-intensity stimuli; and elevated tonic or baseline physiologic activity. Increased sensitivity of the central nervous system is suggested by electrophysiologic evidence for a failure to habituate to redundant information, over-responsiveness to novel information, and reduced cortical responsiveness to overstimulation. Cognitive processing abnormalities are suggested by electrophysiologic evidence for a reduced ability to attend to task-relevant information and increased attention to task-irrelevant, trauma-related information in individuals with PTSD. Some findings, such as the heightened physiologic and P300 response amplitude responses to trauma-related stimuli and increased HR response to loud tones, have been highly replicable and appear to be as reliable as any biologic finding in the psychiatric literature. Other findings, such as increased eye-blink startle responses and tonic or baseline physiologic activity, have been less consistently replicated and have led investigators to explore how stressful or threatening experimental contexts might produce phasic alterations in the psychophysiology of individuals with PTSD. We hope that the broad range of psychophysiologic investigations and findings in PTSD will inspire others to consider possible applications of these methodologies to their own clinical and research endeavors.     

创伤后应激障碍研究进展

<正>近年来,随着战争、海啸、地震、恐怖事件、暴力事件等的增多,创伤后应激障碍(Post-traumatic Stress Disorder,PTSD)的发病率也越来越高。PTSD是一种常见、慢性和多方面致残的疾病,严重危及受害者的社会功能和躯体健康,可造成巨大的社会负担,已成为迫切需要关注的公共卫生问题之一。因此遭遇创伤事件后PTSD的研究具有十分重要的理论意义与实践意义。目前有关PTSD的研究较多,     

Trauma exposure and post-traumatic stress disorder in bipolar disorder

Introduction  

There is a lack of data about post-traumatic stress disorder (PTSD) in European bipolar patients compared to the US-population. This study was conducted to ascertain the rates and types of traumatic events and PTSD in bipolar-I disorder.     

Traumatic experiences,post-traumatic stress disorder and obsessive-compulsive disorder

This paper explores the links between traumatic experiences, post-traumatic stress disorder and obsessive-compulsive disorder. The development of obsessions and compulsions following trauma is noted, with case examples. The similarities in some aspects of the two disorders are also highlighted. Comments are made on the possible causal pathways, and on treatment implications.     

Full and partial post-traumatic stress disorder among World War II prisoners of war

BACKGROUND: The aim of the study is to evaluate the frequency and characteristics of full and partial post-traumatic stress disorder (PTSD) among 66 World War II Nazi prisoners of war, some of whom had been deported to death camps. METHODS: The Structured Clinical Interview for DSM-IV was used to assess the presence of PTSD and major depression. The Dissociative Experiences Scale and the 58-item version of the Hopkins Symptom Checklist were also administered. Partial PTSD was defined as the presence of at least one symptom in each of the clusters defined by DSM-IV. RESULTS: Forty-eight percent of the subjects have a partial PTSD, while 20% reported the full syndrome. When compared to subjects with full PTSD, those with partial PTSD showed a significantly lower frequency of comorbid depression and lower levels of psychological distress, as measured by the Symptom Checklist. No differences were found with regards to dissociative symptoms and help-seeking. CONCLUSIONS: The problem of definition of PTSD partial syndromes deserves more attention in the literature.     

Early intervention for post-traumatic stress disorder

Aims: The potentially debilitating effect of posttraumatic stress disorder (PTSD) has created much interest in early intervention strategies that can reduce PTSD. This review critiques the evidence for psychological debriefing approaches and alternate early intervention strategies. Methods: The review critiques the randomized controlled trials of psychological debriefing, and early provision of cognitive behavior therapy. The latter approach involves therapy attention on acutely traumatized individuals who are high risk for PTSD development, and particularly in people with acute stress disorder (ASD). Results: Psychological debriefing does not prevent PTSD. Cognitive behaviour therapy strategies have proven efficacy in reducing subsequent PTSD in ASD populations. Conclusions: Despite the promising evidence for early provision of CBT, many people do not benefit from CBT. This review concludes with consideration of major challenges facing early intervention approaches in the context of terrorist attacks and mass disasters.     

Glucocorticoid receptor polymorphisms and post-traumatic stress disorder

Post-traumatic stress disorder (PTSD) is reported in some studies to be associated with increased glucocorticoid (GC) sensitivity. Two common glucocorticoid receptor (GR) polymorphisms (N363S and BclI) appear to contribute to the population variance in GC sensitivity. There is some evidence that there may be a genetic predisposition to PTSD. Hence we studied 118 Vietnam war veterans with PTSD for (i) GR polymorphisms, particularly the N363S and the BclI polymorphisms which are thought to be GC sensitising, and (ii) two measures of GC sensitivity, the low-dose 0.25 mg dexamethasone suppression test (LD-DST) and the dermal vasoconstrictor assay (DVVA). The DST and GR polymorphisms were also performed in 42 combat exposed Vietnam war veterans without PTSD. Basal plasma cortisol levels were not significantly different in PTSD (399.5+/-19.2 nmol/L, N=75) and controls (348.6+/-23.0 nmol/L, N=33) and the LD-DST resulted in similar cortisol suppression in both groups (45.6+/-3.2 vs. 40.8+/-4.1%). The cortisol suppression in PTSD patients does not correlate with Clinician Administered PTSD Scores (CAPS), however there was a significant association between the BclI GG genotype and low basal cortisol levels in PTSD (P=0.048). The response to the DVVA was similar to controls (945+/-122, N=106 vs. 730+/-236, N=28, P=0.42). PTSD patients with the GG genotype, however, tended to be more responsive to DVVA and in this group the DVVA correlated with higher CAPS scores. The only exon 2 GR polymorphisms detected were the R23K and N363S. Heterozygosity for the N363S variant in PTSD, at 5.1% was not more prevalent than in other population studies of the N363S polymorphism in Caucasians (6.0-14.8%). The GG genotype of the BclI polymorphism found to be associated with increased GC sensitivity in many studies showed a tendency towards increased response with DVVA and correlated with higher CAPS scores. In conclusion, the N363S and BclI GR polymorphisms were not more frequent in PTSD patients than controls and reported population frequencies. Our PTSD group did not display GC hypersensitivity, as measured by the LD-DST and DVVA. In a subset of PTSD patients with the BclI GG genotype, CAPS scores and basal cortisol levels were negatively correlated.     

Trauma, post-traumatic stress disorder and somatization

In a cross-sectional study, 483 patients (age: 35.8 +/- 13.2 years) of an outpatient psychosomatic university clinic were investigated using a standardized disorder-specific set of tests. 63.1 % of the patients reported to have experienced at least one traumatic event in their life. Test-psychometrically, a posttraumatic stress disorder (PTSD) could be assumed in 10.1 %. Compared to non-traumatized patients, patients with a PTSD reported significantly more frequently somatoform symptoms; even the comparison of traumatized patients with and without PTSD demonstrated a pronounced tendency to somatize in PTSD patients. Neurologic, gastrointestinal and cardiopulmonary symptoms, as well as pain sensations and sexual dysfunctioning were predominantly reported as somatoform complaints. The results emphasize the close connection between somatization and PTSD symptoms; this should be increasingly taken into consideration in the diagnostic process within psychotraumatology.