Trends in Diagnosed Posttraumatic Stress Disorder and Acute Stress Disorder in US College Students, 2017-2022.

This cross-sectional study investigates trends in the prevalence of diagnosed posttraumatic stress disorder (PTSD) and acute stress disorder (ASD) among US college students during a period of increased societal stresses and global health crises from 2017 to 2022.

Influencing factors and early predictive model of acute stress disorder in traumatic patients: A clinical comparative cohort study.

OBJECTIVE: To analyze the main influencing factors of ASD (Acute Stress Disorder) in inpatients, and provide some evidence for early clinical identification and intervention of ASD. METHODS: In this study, 489 inpatients were selected from 3 general hospitals in Zunyi City from September 2020 to August 2021. The patients were followed up with questionnaires. Mann Whitney U test, Logistic Regression analysis and Generalized Estimation Equation were used for difference comparison and influencing factor analyses. RESULTS: Multivariate logistic regression showed that trauma exposure, psychological burden, fear and pain degree were risk factors of ASD in all inpatients. The sensitivity and specificity of combined using of "trauma, psychological burden, fear and pain" in predicting ASD reached 89.40 % and 79.20 %, respectively; and the area under ROC could reach 0.897. CONCLUSION: Based on the different risk factors, an early effective model could be built for ASD prediction in both traumatic and nontraumatic patients.

Acute stress symptoms 1-2 weeks after stroke predict the subsequent development of post-traumatic stress symptoms: A prospective cohort study.

OBJECTIVE: To date no research has examined the potential influence of acute stress symptoms (ASD) on subsequent development of post-traumatic stress disorder (PTSD) symptoms in stroke survivors. Our objective was to examine whether acute stress symptoms measured 1-2 weeks post-stroke predicted the presence of post-traumatic stress symptoms measured 6-12 weeks later. DESIGN: Prospective within-groups study. METHODS: Fifty four participants who completed a measure of acute stress disorder at 1-2 weeks following stroke (time 1) and 31 of these participants completed a measure of posttraumatic stress disorder 6-12 weeks later (time 2). Participants also completed measures of stroke severity, functional impairment, cognitive impairment, depression, anxiety, pre-morbid intelligence and pain across both time points. RESULTS: Some 22% met the criteria for ASD at baseline and of those, 62.5% went on to meet the criteria for PTSD at follow-up. Meanwhile two of the seven participants (28.6%) who met the criteria for PTSD at Time 2, did not meet the ASD criteria at Time 1 (so that PTSD developed subsequently). A hierarchical multiple regression analysis indicated that the presence of acute stress symptoms at baseline was predictive of post-traumatic stress symptoms at follow-up (R2 = .26, p < .01). Less severe stroke was correlated with higher levels of post-traumatic stress symptoms at Time 2 (rho = .42, p < .01). CONCLUSIONS: The results highlight the importance of early assessment and identification of acute stress symptoms in stroke survivors as a risk factor for subsequent PTSD. Both ASD and PTSD were prevalent and the presence of both disorders should be assessed.

Neurobiochemical biomarkers and other risk factors for post-traumatic acute stress disorder.

Trauma is a leading cause of mortality and morbidity around the world and many trauma patients could suffer from a series of cognitive and mental disorders including acute stress disorder (ASD). Yet, little research has been done to investigate the influencing factors and pathogenesis of post-traumatic ASD. Therefore, this study investigated main influencing factors and neurobiochemical biomarkers of ASD in trauma patients with a purpose of early clinical identification and intervention. The patients were followed up by general questionnaire and Acute Stress Disorder scale (ASDS). Using the diagnostic criteria of ASD, the study participants were divided into ASD group and non-ASD group. The generalized estimating equation (GEE) multivariate analysis suggested that life stress, sleep less than 8 h, trauma from road traffic crash, overall pain intensity, injury severity, overall fear after trauma were risk factors for ASD. Neutrophil to lymphocyte ratio (NLR) showed a downward trend in both groups (P < 0.05), and the ASD group was higher than the non-ASD group (P = 0.015). Glu to GABA ratio (GGR) in the ASD group were higher than the non-ASD group (P < 0.001). Both patient demographics and patient's condition could impact the risk of developing ASD after a major injury.

Acute stress disorder in trauma patients discharged in 72 h or less.

INTRODUCTION: Acute Stress Disorder (ASD) is a psychiatric condition affecting individuals exposed to trauma and requires the presence of symptoms 72 h following trauma. Patients evaluated for trauma related injury are often discharged prior to 72 h, but the risk of ASD remains. The aim of this study was to quantify the rate of acute stress disorder in trauma patients admitted for fewer than 72 h. MATERIALS AND METHODS: We performed a prospective, observational study of trauma patients discharged prior to 72 h at our ACS Level I Trauma Center between June 2020 and December 2020. Participants were administered an institutional screening tool following hospital discharge. Positive screens were then administered the diagnostic Acute Stress Disorder Scale (ASDS) tool. The rate of ASD was calculated and bivariate comparisons between participants who met diagnostic criteria and those who did not were performed to identify risk factors for the development of acute stress disorder. RESULTS: 116 patients participated (median age 54, 66% male, median injury severity score (ISS) 9). Forty patients (34%) screened positive via the institutional screening tool, with 14 (12%) ultimately demonstrating ASD by ASDS. Participants who developed ASD were more likely to be female (71 vs. 30%, p = 0.005), African American (43 vs. 12% White, p = 0.016), spend less time in the hospital overall (1-2 vs. 2-3 days. p = 0.045), and have a lower ISS (6 vs. 9, p = 0.041). CONCLUSIONS: Our study found 12% of trauma patients discharged prior to 72 h developed ASD. These data point to possible benefit in reassessment of injured patients following hospital discharge and the importance of developing pathways for trauma patients to access mental health resources.

The prevalence of acute stress disorder after acute myocardial infarction and its psychosocial risk factors among young and middle-aged patients.

Young and middle-aged people are vulnerable to developing acute stress disorder (ASD) following acute myocardial infarction (AMI). This study aims to explore the factors that contribute to ASD in young and middle-aged AMI patients. 190 AMI patients aged 18 to 60 years were enrolled in this study. We assessed the association between ASD and demographic data, adult attachment, and social support. This study examined a total of 190 young and middle-aged people. Among them, 65 participants were diagnosed with ASD, representing a 34.21% positive rate. Multivariate stepwise regression showed that adult attachment, infarct-related artery, social support, in-hospital complications are the main factors affecting ASD. Path analysis showed that social support had mediated the relationship between adult attachment and ASD. The incidence of ASD in young and middle-aged patients with AMI is high. Social support plays an important role in adult attachment and ASD relationships. Adult attachment and social support should be incorporated into post-traumatic cardiac rehabilitation to help patients cope with traumatic occurrences.

Predictors and severity of probable acute stress disorder following the Beirut Port Blast.

Background: The Beirut Port Blast on August 4, 2020 is the largest (non-nuclear) explosion on record. St George Hospital University Medical Center (SGHUMC), a leading academic medical centre in Lebanon, adjacent to the Port, sustained a massive loss in lives and infrastructure. Objective: The current study uses the baseline data of an ongoing longitudinal study to explore the prevalence, severity, and predictors of probable Acute Stress Disorder (ASD) among health workers at SGHUMC following the blast. Methods: In the context of COVID-19 tests administered 9-15 days after the blast, SGHUMC staff were asked to complete a questionnaire that included socio-demographic details, the Beirut Port Exposure Inventory, and the Acute Stress Disorder Scale (ASDS). Results: A total of 570 health workers participated in the study. The prevalence of probable DSM-5 ASD [95%CI] was 38.34% [31.41; 45.32]. Many specific exposures were related, on a bivariate level, to ASD be it as a probable DSM-5 diagnosis or its severity as measured by the ASDS. A classification and regression tree (CART) analysis identified the highest risk predictors of probable DSM-5 ASD diagnosis to be: being a female, seeing dead or mutilated bodies, death of a close one, and being scared at the time of the explosion. Nurses carried the highest risks of all health workers with a probable DSM-5 ASD prevalence of 51.28%, (OR = 3.72 [95% CI: 2.22; 6.25]). Being scared at the time of the blast was the most single predictor of probable ASD. Conclusion: Both the prevalence and severity of probable DSM-5 ASD in this sample are higher than most reported in the literature, which may be explained by the severity of the trauma and the ongoing stress in the context of the pandemic. Fear at the time of the explosion was independently the most predictive parameter of probable ASD.

Antecedentes: La explosión del Puerto de Beirut el 4 de agosto de 2020 es la explosión (no nuclear) más grande registrada. El Centro Médico Universitario del Hospital St George (SGHUMC), un centro médico académico líder en el Líbano, adyacente al puerto, sufrió una pérdida masiva de vidas e infraestructura. Objetivo: El estudio actual utiliza los datos iniciales de un estudio longitudinal en curso para explorar la prevalencia, gravedad y predictores del probable Trastorno de Estrés Agudo (TEA) entre los trabajadores de la salud en SGHUMC después de la explosión. Métodos: En el contexto de las pruebas de COVID-19 administradas entre 9 y 15 días después de la explosión, se le pidió al personal de SGHUMC que completara un cuestionario que incluía detalles sociodemográficos, el Inventario de Exposición del Puerto de Beirut y la Escala de Trastorno de Estrés Agudo (ETEA). Resultados: Un total de 570 trabajadores de la salud participaron en el estudio. La prevalencia de probable TEA DSM-5 [IC 95%] fue del 38,34% [31,41; 45.32]. Muchas exposiciones específicas se relacionaron, en un nivel bivariado, con TEA, ya sea como un diagnóstico probable del DSM-5 o su gravedad medida por el ETEA. Un análisis del árbol de clasificación y regresión (CART, por sus siglas en inglés) identificó que los predictores de riesgo más alto del diagnóstico probable de TEA según el DSM-5 son: ser mujer, ver cuerpos muertos o mutilados, la muerte de alguien cercano y tener miedo en el momento de la explosión. Las enfermeras tenían los riesgos más altos de todos los trabajadores de la salud con una prevalencia probable de TEA según el DSM-5 del 51,28%, (OR = 3,72 [IC del 95%: 2,22; 6.25]). Sentirse aterrorizados en el momento de la explosión fue el predictor más determinante de probable TEA. Conclusión: Tanto la prevalencia como la gravedad del probable TEA DSM-5 en esta muestra son más altas que la mayoría de las reportadas en la literatura, lo que puede explicarse por la gravedad del trauma y el estrés continuo en el contexto de la pandemia. El miedo en el momento de la explosión fue independientemente el parámetro más predictivo de probable TEA.

Prevalence and risk factors for acute stress disorder and posttraumatic stress disorder after burn injury.

BACKGROUND: Psychological consequences of burn injury can be profound. Acute stress disorder (ASD) and posttraumatic stress disorder (PTSD) are known sequelae, but routine identification is challenging. This study aims to identify patient characteristics associated with outpatient positive screens. METHODS: The Primary Care Posttraumatic Stress Disorder questionnaire (PC-PTSD-4) was administered at initial outpatient Burn Center visits between 5/2018-12/2018. Demographics, injury mechanism, and total body surface area (TBSA) were recorded. Those with ≥3 affirmative answers were considered positive. Patients with positive and negative screens were compared. RESULTS: Of 307 surveys collected, 292 (median TBSA 1.5 %, IQR 0.5-4.0 %) remained for analysis after exclusions. Of those, 24.0 % screened positive. Positive screens were associated with presence of a deep component of the injury, injury mechanism, upper extremity involvement, ICU admission, and prolonged hospital length of stay. CONCLUSIONS: Numerous factors distinguish burn injury from other traumatic mechanisms and contribute to disproportionate rates of traumatic stress disorders. Optimization of burn-oriented ASD and PTSD screening protocols can enable earlier intervention.

Prevalence and risk factors for acute stress disorder in female victims of sexual assault.

Sexual assault is one of the most traumatic events a person can experience. Despite this, information regarding the risk factors associated with the development of Acute Stress Disorder (ASD) in sexual assault victims is scarce. A follow-up prospective cohort study was designed to examine the prevalence and risk factors of ASD in women exposed to a recent sexual assault. A total of 156 women were treated at the Emergency Department of a university general hospital shortly after sexual assault. Sociodemographic, clinical and sexual assault-related variables were collected. The Acute Stress Disorder Interview was used to estimate the prevalence of ASD at three weeks post-SA. From the 156 victims, 66.6% (N = 104) met ASD diagnosis using DSM-5 criteria, whereas 59.6% (N = 93) met ASD diagnosis using DSM-IV criteria. The risk factors associated with the development of ASD were nationality, psychiatric history, peritraumatic dissociation and type of assault. In conclusion, the prevalence of ASD in female victims of recent sexual assault was high, affecting approximately two thirds of them. The recognition of the risk factors associated with ASD development, like peritraumatic dissociation or type of assault, may aid in the prompt detection of vulnerable women that require early and specific interventions shortly after trauma.

Prediction of posttraumatic stress disorder by acute stress disorder in traffic accident survivors.

BACKGROUND: To investigate the predictive effect of different symptoms of early acute stress disorder (ASD) on posttraumatic stress disorder (PTSD) in traffic accident survivors. METHODS: A total of 206 traffic accident survivors were assessed with the acute stress disorder scale (ASDS) within 2-23 days after accidents, as well as with 17-item PTSD checklist-specific stressor version (PCL-S) during 4-12 months after accidents. All into the first group of subjects by senior surgeon assessment, based on the clinical, radiological and laboratory examination, excluded traumatic brain injuries, and mild brain injury. And then, assessment by clinical psychological practitioner. RESULTS: The severity of ASD can significantly predict the severity of PTSD symptoms. ASD reexperience symptoms and avoidance symptoms can significantly predict PTSD reexperience symptoms and avoidance symptoms. ASD hyperarousal symptoms can significantly predict PTSD hyperarousal symptoms. DISCUSSION: ASD and PTSD are common psychological disorders among traffic accident survivors. ASD can predict the symptoms and severity of PTSD.

Incidence and Direct Medical Cost of Acute Stress Disorder and Post-traumatic Stress Disorder in Korea: Based on National Health Insurance Service Claims Data from 2011 to 2017.

BACKGROUND: We aimed to investigate the annual incidence of trauma and stress-related mental disorder including acute stress disorder (ASD) and post-traumatic stress disorder (PTSD) using the National Health Insurance Service Database. In addition, we estimated direct medical cost of ASD and PTSD in Korea. METHODS: To examine the incidence, we selected patients who had at least one medical claim containing a 10th revision of the International Statistical Classification of Diseases and Related Health Problems code for ASD (F43.0) and PTSD (F43.1) and had not been diagnosed in the previous 360 days, from 2010 to 2017. We estimated annual incidence and the number of newly diagnosed patients of ASD and PTSD. Annual prevalence and direct medical cost of ASD and PTSD were also estimated. RESULTS: The number of newly diagnosed cases of ASD and PTSD from 2011 to 2017 totaled 38,298 and 21,402, respectively. The mean annual incidence of ASD ranged from 8.4 to 13.7 per 100,000 population and that of PTSD ranged from 4.2 to 8.3 per 100,000 population, respectively. The incidence of ASD was found more in females and was highest among the 70-79 years of age group and the self-employed individuals group. The incidence of PTSD was also more common in the female group. However, the incidence of PTSD was highest in the 60-69 years of age group and in the medical aid beneficiaries group. The annual estimated medical cost per person of ASD ranged from 104 to 149 US dollars (USD). In addition, that of PTSD ranged from 310 to 426 USD. CONCLUSION: From 2011 to 2017, the annual incidence and direct medical cost of ASD and PTSD in Korea were increased. Proper information on ASD and PTSD will not only allows us to accumulate more knowledge about these disorders themselves but also lead to more appropriate therapeutic interventions by improving the ability to cope with these trauma related psychiatric sequelae.

DSM-5-Based ASD Models: Assessing the Latent Structural Relations with Functionality in War-Exposed Individuals.

There is a dearth of studies investigating the latent structure of Acute Stress Disorder (ASD) following the changes in the fifth edition of the Diagnostic and Statistical Manual for Mental Disorders (DSM-5). To date, there is no consensus on the best representation of ASD. This study addressed this gap by examining four latent ASD models in a sample of war-exposed individuals (N = 424). Investigation on the relationship of the best-fitting model to functionality in the latent level was also conducted. The five-factor model, composed of intrusion, avoidance, numbing, dysphoric arousal, and anxious arousal factors, yielded the best-fitting model. Latent associations between the factors of the model and functionality suggest that symptoms of functionality do not significantly affect the factor structure of ASD. These findings have implications for understanding the underlying mechanism of ASD and can inform the development of more nuanced trauma-related interventions, particularly addressing ASD symptoms and functionality separately.

Admission Psychosocial Characteristics of Critically Ill Children and Acute Stress.

OBJECTIVES: Children are at increased risk for developing acute stress and post-traumatic stress following admission to the PICU. The primary objective of this investigation was to explore the prehospitalization psychosocial characteristics of children admitted to the PICU and their association with acute stress. DESIGN: Observational. SETTING: The PICU at an urban, academic, pediatric medical center. PATIENTS: Children, 8-17 years old with an expected PICU stay greater than 24 hours were recruited. MEASUREMENTS AND MAIN RESULTS: During the admission, they completed questionnaires and a semistructured interview evaluating prehospitalization psychosocial symptoms, including prehospitalization post-traumatic stress, quality of life, and current acute stress. One hundred eleven children were enrolled (mean age = 12.9 yr; 60% male; 58% Latino). Half (51%) reported a prehospitalization history of trauma and nearly all (96%) of these children had post-traumatic stress. They had significant impairment on all domains of quality of life. Children reported high rates of acute stress during their hospitalization, 74.8% acute stress symptoms, and 6% met diagnostic criteria for acute stress disorder. Univariate analysis showed associations between child age, quality of life, chronic illness, and post-traumatic stress with more severe acute stress. Multiple linear regression modeling of acute stress was done accounting for child age, acute versus chronic illness, quality of life, and post-traumatic stress; prehospitalization quality of life and post-traumatic stress remained significantly associated with the development of inhospital acute stress and accounted for 34% of the variance of the model. CONCLUSIONS: The current investigation is a novel evaluation of the prehospitalization psychosocial characteristics of children admitted to a PICU. The children enrolled reported high rates of acute stress, which was associated with a history of post-traumatic stress and worsened quality of life. The relation with post-traumatic stress is consistent with prior research into complex post-traumatic stress disorder and increases concerns about long-term psychosocial outcomes. Our data advance understanding of the factors contributing to acute stress during hospitalizations and may add to recognizing the importance of models integrating psychosocial support.

The use of machine learning techniques in trauma-related disorders: a systematic review.

Establishing the diagnosis of trauma-related disorders such as Acute Stress Disorder (ASD) and Posttraumatic Stress Disorder (PTSD) have always been a challenge in clinical practice and in academic research, due to clinical and biological heterogeneity. Machine learning (ML) techniques can be applied to improve classification of disorders, to predict outcomes or to determine person-specific treatment selection. We aim to review the existing literature on the use of machine learning techniques in the assessment of subjects with ASD or PTSD. We systematically searched PubMed, Embase and Web of Science for articles published in any language up to May 2019. We found 806 abstracts and included 49 studies in our review. Most of the included studies used multiple levels of biological data to predict risk factors or to identify early symptoms related to PTSD. Other studies used ML classification techniques to distinguish individuals with ASD or PTSD from other psychiatric disorder or from trauma-exposed and healthy controls. We also found studies that attempted to define outcome profiles using clustering techniques and studies that assessed the relationship among symptoms using network analysis. Finally, we proposed a quality assessment in this review, evaluating methodological and technical features on machine learning studies. We concluded that etiologic and clinical heterogeneity of ASD/PTSD patients is suitable to machine learning techniques and a major challenge for the future is to use it in clinical practice for the benefit of patients in an individual level.

Gender Differences in the Prediction of Acute Stress Disorder From Peritraumatic Dissociation and Distress Among Victims of Violent Crimes.

Peritraumatic dissociation and distress are strong predictors of acute stress disorder (ASD) and posttraumatic stress disorder (PTSD) development. However, there is limited data concerning gender differences in these relations, particularly among victims of violent crimes (VVC). The objective of this study is to examine whether peritraumatic dissociation and distress predict the number of ASD symptoms differently for men and women VVC. In all, 162 adults (97 women, M age = 39.6 years), 63% of whom experienced physical assaults, completed the Acute Stress Disorder Interview, the Peritraumatic Dissociative Experience Questionnaire, and the Peritraumatic Distress Inventory. Analyses included t tests and multiple hierarchical regressions models controlling for known PTSD risk factors. The regression model showed dissociation and distress to be significant predictors of ASD for both men and women (ß = .349 and ß =.312 respectively; all p < .001). A significant three-way interaction was also observed between peritraumatic distress (PDI), past potentially traumatic experiences, and gender. In simple slopes analyses, the combination of high levels of PDI and of a high number of past potentially traumatic events were associated with greater risk of ASD in men only (b = 3.78, p < .001). However, women experienced greater PDI, t(157) = 5.844, p = .005, than men, and elevated distress was associated with more ASD symptoms independently of past traumatic events. Gender differences were revealed as a function of past potentially traumatic experiences. There is a cumulative impact of past potential traumas and current distress that predicts ASD in men, while in women, it contributes to ASD via increased distress.

The Hidden Burden of Mental Health Outcomes Following Firearm-related Injures.

OBJECTIVES: Examine the effect of different types of firearms on readmission due to acute stress disorder (ASD) and/or post-traumatic stress disorder (PTSD) in firearm-injury victims. BACKGROUND: Survivors of firearm-related injuries suffer long-term sequelae such as disability, work loss, and deterioration in the quality of life. There is a paucity of data describing the long-term mental health outcomes in these patients. METHODS: We performed a 5-year (2011-2015) analysis of the Nationwide Readmission Database. All adult patients with firearm injuries were stratified into 3 groups by firearm type: handgun, shotgun, and semiautomatic rifle. Outcome measures were the incidence and predictors of ASD/PTSD. RESULTS: A total of 100,704 victims of firearm-related injuries were identified, of which 13.3% (n = 13,393) were readmitted within 6 months of index hospitalization, 6.7% (n = 8970) of these due to ASD/PTSD. Mean age was 34 ±â€Š14 years, 88% were men. Of those readmitted due to ASD/PTSD, 24% (n = 2153) sustained a handgun-related injury on index hospitalization, 12% (n = 1076) shotgun, and 64% (n = 5741) semiautomatic gun (P = 0.039). On regression analysis, semiautomatic gun and shotgun victims had higher odds of developing ASD/PTSD upon readmission [odds ratio (OR): 2.05 (1.10-4.12) and OR: 1.41 (1.08-2.11)] compared to handgun. Female sex [OR: 1.79 (1.05-3.05)] and younger age representing those younger than 25 years [OR: 4.66 (1.12-6.74)] were also independently associated with higher odds of ASD/PTSD. CONCLUSIONS: Apart from the lives lost, survivors of semiautomatic rifle- and shotgun-related injuries suffer long-term mental health sequalae. These secondary and debilitating mental health outcomes are important considerations for capturing the overall burden of the disease.

Prevalence Rates of Acute Stress Disorder Symptomatology and Association to Juvenile Crime Involvement.

Little is known about the relationship between acute stress disorder and criminal behavior among youth. This study examined data from the National Comorbidity Survey-Adolescent Supplement (NCS-A). Participants in this survey, which took place between February 2001 and January 2003, consisted of 10,148 youth between the ages of 13 and 18 years. Because the NCS-A was conducted prior to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), symptoms of posttraumatic stress disorder from the fourth edition of the DSM were mapped to DSM-5 criteria for ASD. Due to changes in the DSM-5 criteria for ASD, youth in this study were described as having "ASD symptomatology." Youth with ASD symptomatology were significantly more likely to report involvement in crimes than youth without any lifetime diagnosis, regardless of whether the crimes resulted in arrest. The data presented here provide a more accurate picture of the relationship between ASD and crime. These data suggest that it may be useful to develop prevention and intervention strategies that provide education and support to at-risk youth who develop ASD symptoms. The quality of life for untreated youth decreases significantly, and untreated youth are likely at risk for criminal involvement, suicide, and other comorbid psychiatric disorders.

The Current Evidence for Acute Stress Disorder.

PURPOSE OF REVIEW: The aim of this review is to provide a summary of the current evidence pertaining to the course of acute and chronic posttraumatic stress, the diagnosis of acute stress disorder (ASD), and treatment of acute stress disorder and prevention of posttraumatic stress disorder (PTSD). RECENT FINDINGS: Although acute stress disorder was introduced partly to predict subsequent PTSD, longitudinal studies indicate that ASD is not an accurate predictor of PTSD. Recent analytic approaches adopting latent growth mixture modeling have shown that trauma-exposed people tend to follow one of four trajectories: (a) resilient, (b) worsening, (c) recovery, and (d) chronically distressed. The complexity of the course of posttraumatic stress limits the capacity of the ASD diagnosis to predict subsequent PTSD. Current evidence indicates that the treatment of choice for ASD is trauma-focused cognitive behavior therapy, and this intervention results in reduced chronic PTSD severity. Recent attempts to limit subsequent PTSD by early provision of pharmacological interventions have been promising, especially administration of corticosterone to modulate glucocorticoid levels. Although the ASD diagnosis does not accurately predict chronic PTSD, it describes recently trauma-exposed people with severe distress. Provision of CBT in the acute phase is the best available strategy to limit subsequent PTSD.