Complex Posttraumatic Stress Disorder Symptom Profiles in Traumatized Refugees

Although it is well documented that exposure to severe, cumulative trauma and postdisplacement stress increases the risk for posttraumatic stress symptom disorder (PTSD), less is known about the representation and predictors of complex PTSD (CPTSD) symptoms in refugee populations. We examined PTSD and CPTSD symptom profiles (co‐occurring PTSD and disturbances in self‐organization [DSO] symptoms) and their premigration, postmigration, and demographic predictors, using latent class analysis (LCA), in a cohort of 112 refugees resettled in Australia. The LCA identified a four‐factor model as the best fit to the data, comprising classes categorized as: (a) CPTSD, exhibiting high levels of PTSD and DSO symptoms (29.5%); (b) PTSD only (23.5%); (c) high affective dysregulation (AD) symptoms (31.9%); and (d) low PTSD and DSO symptoms (15.1%). Membership in the CPTSD and PTSD classes was specifically associated with cumulative traumatization, CPTSD OR = 1.56, 95% CI [1.15, 2.12], and PTSD OR = 1.64, 95% CI [1.15, 2.34]; and female gender, CPTSD OR = 14.18, 95% CI [1.66, 121.29], and PTSD OR = 16.84, 95% CI [1.78, 159.2], relative to the low‐symptom class. Moreover, CPTSD and AD class membership was significantly predicted by insecure visa status, CPTSD OR = 7.53, 95% CI [1.26, 45.08], and AD OR = 7.19, 95% CI [1.23, 42.05]. These findings are consistent with the ICD‐11 model of CPTSD and highlight the contributions of cumulative trauma to CPTSD and PTSD profiles as well as of contextual stress from visa uncertainty to DSO symptom profiles in refugee cohorts, particularly those characterized by AD.     

Social–Emotional Profiles of PTSD,Complex PTSD,and Borderline Personality Disorder Among Racially and Ethnically Diverse Young Adults: A Latent Class Analysis

The debate around the construct validity of complex posttraumatic stress disorder (CPTSD) has begun to examine whether CPTSD diverges from posttraumatic stress disorder (PTSD) when it co‐occurs with the diagnosis of borderline personality disorder (BPD). The present study (a) examined the construct validity of CPTSD through a latent class analysis of a non–treatment‐seeking sample of young trauma‐exposed adults and (b) characterized each class in terms of trauma characteristics, social emotions (e.g., shame, guilt, blame), and interpersonal functioning. A total of 23 dichotomized survey items were chosen to represent the symptoms of PTSD, CPTSD, and BPD and administered to 197 trauma‐exposed participants. Fit statistics compared models with 2–4 latent classes. The four‐class model showed the best fit statistics and clinical interpretability. Classes included a “high PTSD+CPTSD+BPD” class, characterized by high‐level endorsement of all symptoms for the three diagnoses; a “moderate PTSD+CPTSD+BPD” class, characterized by endorsement of some symptoms across all three diagnoses; a “PTSD” class, characterized by endorsement of the ICD‐11 PTSD criteria; and a “healthy” class, characterized by low symptom endorsement overall. Pairwise comparisons showed individuals in the high PTSD+CPTSD+BPD class to have the highest levels of psychological distress, traumatic event history, adverse childhood experiences, and PTSD symptoms. Shame was the only social emotion to significantly differ between the classes, p = .002, η² = .16. The findings diverge from the literature, indicating an overlap of PTSD, CPTSD, and BPD symptoms in a non–treatment‐seeking community sample. Further, shame may be a central emotion that differentiates between presentation severities following trauma exposure.     

Examining the Discriminant Validity of Complex Posttraumatic Stress Disorder and Borderline Personality Disorder Symptoms: Results From a United Kingdom Population Sample

Complex posttraumatic stress disorder (CPTSD) was added to the diagnostic nomenclature in the 11th revision of the International Classification of Diseases (ICD‐11). Although considerable evidence exists supporting the construct validity of CPTSD, the distinguishability of CPTSD symptoms from those of borderline personality disorder (BPD) has been questioned. The present study examined the discriminant validity of CPTSD and BPD symptoms among a trauma‐exposed population sample from the United Kingdom (N = 546). Participants completed self‐report measures of CPTSD and BPD symptoms, and their latent structure was assessed using exploratory structural equation modeling (ESEM). A three‐factor model with latent variables reflecting PTSD, disturbances in self‐organization (DSO), and BPD symptoms provided the best fit of the data, χ²(399, N = 546) = 1,650, p < .001; CFI = .944; TLI = .930; RMSEA = .077, 90% CI [.073, .081]. We identified multiple symptoms distinctive to individual constructs (e.g., disturbed relationships and suicidality) as well as symptoms shared across the constructs (e.g., affective dysregulation). The PTSD, β = .24; DSO, β = .23; and BPD, β = .27, latent variables were positively and significantly associated with childhood interpersonal trauma. The current findings support the discriminant validity of CPTSD and BPD symptoms and highlight various phenomenological signatures of each construct as well as demonstrate how these constructs share important similarities in symptom composition and exogenous correlates.     

The Complex Trauma Inventory: A Self‐Report Measure of Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder

The work group revising the criteria for trauma‐related disorders in the International Classification of Diseases (ICD‐11) made several changes. Specifically, they simplified the criteria for posttraumatic stress disorder (PTSD) and added a new trauma disorder called complex PTSD (CPTSD). These proposed changes to taxonomy require new instruments to assess these novel constructs. We developed a measure of PTSD and CPTSD (the Complex Trauma Inventory; CTI) according to the proposed domains, creating several items to assess each domain. We examined the factor structure of the CTI in two separate samples of diverse college students (n ₁ = 391; n ₂ = 391) who reported exposure to at least one traumatic event and at least occasional functional impairment. After reducing the original 50 items in the item pool to 20 items, confirmatory factor analyses supported two highly correlated second‐order factors—PTSD and disturbances in self‐organization (DSO)—with PTSD (i.e., reexperiencing, avoidance, sense of threat) and DSO (i.e., affect dysregulation, negative self‐concept, and disturbances in relationships), each loading on three of the six ICD‐11‐consistent first‐order factors, root mean square error of approximation (RMSEA) = .056, 95% confidence interval (CI) [.048, .064], comparative fit index (CFI) = .956, Tucker‐Lewis index (TLI) = .948, standardized root mean square residual (SRMR) = .043, Bayesian information criterion (BIC) = 641.55, χ²(163) = 361.02, p < .001. Internal consistencies for PTSD and DSO were good to excellent (Cronbach's αs = .89 to .92). Supplementary analyses supported the gender invariance of the CFA model, as well as convergent and discriminant validity of the CTI. The validity of the CTI supports the distinction between CPTSD and PTSD. Moreover, the CTI will assist clinicians with diagnosis, symptom tracking, treatment planning, and assessing outcomes.     

Modeling Patterns of Polyvictimization and Their Associations with Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the Israeli Population

Although evidence is accumulating for the conceptual validity of the ICD‐11 proposal for posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD), our understanding of the specificity of trauma‐related predictors is still evolving. Specifically, studies utilizing advanced statistical methods to model the association between trauma exposure and ICD‐11 proposals of traumatic stress and differences in profiles of trauma exposure are lacking. Additionally, time since trauma and a clear memory of the trauma are yet to be examined as predictors of PTSD and CPTSD. We analyzed trauma exposure as reported by a general population sample of Israeli adults (N = 834), using latent class analysis, and the resultant classes were used in regression models to predict PTSD and CPTSD operationalized both dimensionally and categorically. Four distinct groups were identified: child and adult interpersonal victimization, community victimization–male, community victimization–female, and adult victimization. These groups were differentially related to PTSD and CPTSD, with only child and adult interpersonal victimization consistently predicting CPTSD and disturbances in self‐organization. When modeled dimensionally, PTSD was associated with the child and adult interpersonal victimization and adult victimization groups, whereas only the child and adult interpersonal victimization group was predictive of PTSD when operationalized categorically. The roles of time since trauma and a clear memory of the trauma differed across PTSD and CPTSD. These findings support the use of trauma typologies for predicting PTSD and CPTSD and provide important insight into the distribution of trauma exposure in the Israeli population.     

Using Latent Class Analysis to Support the ICD-11 Complex Posttraumatic Stress Disorder Diagnosis in a Sample of Homeless Adults

The 11th revision of the International Classification of Diseases (ICD-11), ratified at the World Health Assembly in May 2019, introduced revised diagnostic guidelines for posttraumatic stress disorder (PTSD) as well as a separate diagnosis of complex PTSD (CPTSD). We aimed to test the new ICD-11 symptom structure for PTSD and CPTSD in a sample of individuals who have experienced homelessness. Experiences of trauma exposure and the associated mental health outcomes have been underresearched in this population. A sample of adults experiencing homelessness (N = 206) completed structured and semi-structured interviews that collected information about trauma exposure and symptoms of PTSD and CPTSD. We conducted a latent class analysis (LCA) using six symptom clusters (three PTSD symptom clusters that are components of CPTSD and three CPTSD symptom clusters). All participants reported trauma exposure, with 88.6% having experienced at least one event before 16 years of age. Four distinct classes of participants emerged in relation to the potential to meet the diagnosis: LCA CPTSD (n = 122, 59.8%), LCA no diagnosis (n = 27: 13.2%), LCA PTSD (n = 33; 16.2%), and LCA disturbance in self-organization (DSO; n = 22; 10.8%). Of note, participants with an ICD-11 CPTSD as well as those with an ICD-11 PTSD diagnosis fell into the LCA CPTSD class. Our findings provide some support for the distinction between CPTSD and PTSD within this population specifically but potentially have broader implications. Clear diagnoses will allow targeted PTSD and CPTSD treatment development.     

Commentary on the Special Section on Complex PTSD: Still Going Strong After All These Years

Posttraumatic stress disorder (PTSD) is inherently complex, yet a growing evidence base indicates that a complex variant (CPTSD) can be distinguished from classic PTSD based on evidence of clinically significant affect, interpersonal, and self/identity dysregulation. This Commentary to the Journal of Traumatic Stress special section on CPTSD reviews the results of four new studies that empirically tested the structure, traumatic stressor antecedents, and construct validity of CPTSD in relation to PTSD and borderline personality disorder (BPD). Based on these and prior empirical findings, a reconceptualization of PTSD, CPTSD, and BPD as posttraumatic threat, betrayal, and rejection disorders, respectively, is proposed. Implications for treatment of trauma survivors are discussed in relation to articles in this special section, which describe a modular framework for CPTSD treatment and an innovative attachment and self‐regulation focused on the redesign of a traditional outpatient mental health clinic.     

ICD‐11 Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the United States: A Population‐Based Study

The primary aim of this study was to provide an assessment of the current prevalence rates of International Classification of Diseases (11th rev.) posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) among the adult population of the United States and to identify characteristics and correlates associated with each disorder. A total of 7.2% of the sample met criteria for either PTSD or CPTSD, and the prevalence rates were 3.4% for PTSD and 3.8% for CPTSD. Women were more likely than men to meet criteria for both PTSD and CPTSD. Cumulative adulthood trauma was associated with both PTSD and CPTSD; however, cumulative childhood trauma was more strongly associated with CPTSD than PTSD. Among traumatic stressors occurring in childhood, sexual and physical abuse by caregivers were identified as events associated with risk for CPTSD, whereas sexual assault by noncaregivers and abduction were risk factors for PTSD. Adverse childhood events were associated with both PTSD and CPTSD, and equally so. Individuals with CPTSD reported substantially higher psychiatric burden and lower levels of psychological well‐being compared to those with PTSD and those with neither diagnosis.     

Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in DSM‐5 and ICD‐11: Clinical and Behavioral Correlates

The American Psychiatric Association and the World Health Organization provide distinct trauma‐based diagnoses in the fifth edition of the Diagnostic and Statistical Manual (DSM‐5), and the forthcoming 11th version of the International Classification of Diseases (ICD‐11), respectively. The DSM‐5 conceptualizes posttraumatic stress disorder (PTSD) as a single, broad diagnosis, whereas the ICD‐11 proposes two “sibling” disorders: PTSD and complex PTSD (CPTSD). The objectives of the current study were to: (a) compare prevalence rates of PTSD/CPTSD based on each diagnostic system; (b) identify clinical and behavioral variables that distinguish ICD‐11 CPTSD and PTSD diagnoses; and (c) examine the diagnostic associations for ICD‐11 CPTSD and DSM‐5 PTSD. Participants in a predominately female clinical sample (N = 106) completed self‐report scales to measure ICD‐11 PTSD and CPTSD, DSM‐5 PTSD, and depression, anxiety, borderline personality disorder, dissociation, destructive behaviors, and suicidal ideation and self‐harm. Significantly more people were diagnosed with PTSD according to the DSM‐5 criteria (90.4%) compared to those diagnosed with PTSD and CPTSD according to the ICD‐11 guidelines (79.8%). An ICD‐11 CPTSD diagnosis was distinguished from an ICD‐11 PTSD diagnosis by higher levels of dissociation (d = 1.01), depression (d = 0.63), and borderline personality disorder (d = 0.55). Diagnostic associations with depression, anxiety, and suicidal ideation and self‐harm were higher for ICD‐11 CPTSD compared to DSM‐5 PTSD (by 10.7%, 4.0%, and 7.0%, respectively). These results have implications for differential diagnosis and for the development of targeted treatments for CPTSD.     

Neural Correlates of Trait Rumination During an Emotion Interference Task in Women With PTSD

Rumination, defined as repetitive, negative, self‐focused thinking, is hypothesized to be a transdiagnostic factor that is associated with depression, anxiety, and posttraumatic stress disorder (PTSD). Theory has suggested that in individuals with PTSD, rumination serves as a cognitive avoidance factor that contributes to the maintenance of symptoms by inhibiting the cognitive and emotional processing of the traumatic event, subsequently interfering with treatment engagement and outcome. Little is known about the neural correlates of rumination in women with PTSD. The current study utilized functional magnetic resonance imaging (fMRI) to examine neural correlates during an emotion interference task of self‐reported rumination in women with PTSD. Women with PTSD (39 participants) were recruited at a university‐based trauma clinic and completed a clinical evaluation that included measures of PTSD symptoms, rumination, and depressive symptoms, as well as a neuroimaging session in which the participants were administered an emotion interference task. There was a significant relationship between self‐reported rumination and activity in the right orbital frontal cortex, BA 11; t(37) = 5.62, p = .004, k = 46 during the task. This finding suggested that women with PTSD, who had higher levels of rumination, may experience greater difficulty inhibiting negative emotional stimuli compared to women with lower levels of rumination.     

The Association Between Peritraumatic Dissociation and PTSD Symptoms: The Mediating Role of Negative Beliefs About the Self

Peritraumatic dissociation, a term used to describe a complex array of reactions to trauma, including depersonalization, derealization, and emotional numbness, has been associated with posttraumatic stress disorder (PTSD) symptoms across a number of studies. Cognitive theory suggests that interpretations of traumatic events and reactions underlie the persistence of PTSD. The present study examined the associations among peritraumatic dissociation, posttraumatic cognitions, and PTSD symptoms in a group of trauma‐exposed adults (N = 169). Results indicated that, after accounting for overall symptom severity and current dissociative tendencies, peritraumatic dissociation was significantly predictive of negative beliefs about the self (R ² = .06, p < .001). Other categories of maladaptive posttraumatic cognitions did not show a similar relationship (R ² = .01 to .02, nonsignificant). Negative thoughts about the self partially mediated the association between peritraumatic dissociation and PTSD severity (completely standardized indirect effect = .25). These findings lend support to cognitive theories of PTSD and point to an important area for clinical intervention.     

The Strongest Correlates of PTSD for Firefighters: Number,Recency, Frequency,or Perceived Threat of Traumatic Events?

Firefighters experience a wide range of traumatic events while on duty and are at risk to develop psychopathology and posttraumatic stress disorder (PTSD). According to cognitive models, the person's interpretation of the traumatic event is responsible for the development of PTSD rather than the traumatic event itself. This cross‐sectional study aimed to explore the contribution of perceived threat to explain PTSD symptoms in Portuguese firefighters, after adjusting for potential confounding factors. A sample of 397 firefighters completed self‐report measures of exposure to traumatic events, psychopathology, and PTSD. Perceived threat explained unique variance in PTSD symptoms, R² = .40, ΔR² = .02, F(10, 367) = 24.55, p < .001, Cohen's f² =.03, after adjusting for psychopathology, number, recency, and frequency of the events, and other potential confounding variables. The association between psychopathology and PTSD was also moderated by perceived threat, R² = .43, ΔR² = .03, F(11, 366) = 25.33, p < .001, Cohen's f² =.05. Firefighters may benefit from interventions that focus on perceived threat to prevent PTSD symptoms.     

Self‐Compassion as a Prospective Predictor of PTSD Symptom Severity Among Trauma‐Exposed U.S. Iraq and Afghanistan War Veterans

U.S. combat veterans of the Iraq and Afghanistan wars have elevated rates of posttraumatic stress disorder (PTSD) compared to the general population. Self‐compassion, characterized by self‐kindness, a sense of common humanity when faced with suffering, and mindful awareness of suffering, is a potentially modifiable factor implicated in the development and maintenance of PTSD. We examined the concurrent and prospective relationship between self‐compassion and PTSD symptom severity after accounting for level of combat exposure and baseline PTSD severity in 115 Iraq and Afghanistan war veterans exposed to 1 or more traumatic events during deployment. PTSD symptoms were assessed using the Clinician Administered PTSD Scale for DSM‐IV (CAPS‐IV) at baseline and 12 months (n =101). Self‐compassion and combat exposure were assessed at baseline via self‐report. Self‐compassion was associated with baseline PTSD symptoms after accounting for combat exposure (β = ?.59; p < .001; ΔR² = .34; f² = .67; large effect) and predicted 12‐month PTSD symptom severity after accounting for combat exposure and baseline PTSD severity (β = ?.24; p = .008; ΔR² = .03; f² = .08; small effect). Findings suggest that interventions that increase self‐compassion may be beneficial for treating chronic PTSD symptoms among some Iraq and Afghanistan war veterans.     

Traumatic Event Exposure,Posttraumatic Stress Disorder,and Sleep Disturbances in a National Sample of U.S. Adults

Posttraumatic stress disorder (PTSD) is a highly prevalent, debilitating disorder found to develop after exposure to a potentially traumatic event (PTE). Individuals with PTSD often report sleep disturbances, specifically nightmares and insomnia, which are listed within the criteria for PTSD. This research examined prevalence of insomnia and nightmares within a national sample of 2,647 adults (data weighted by age and sex to correct for differences in sample distribution) who had been exposed to one or more PTEs. Prevalence of self‐reported sleep disturbance, sleep disturbances by PTE type, and gender differences were examined. All participants completed a self‐administered, structured online interview that assessed exposure to stressful events and PTSD symptoms. Among individuals who met DSM‐5 criteria for PTSD, a large majority (more than 92%) reported at least one sleep disturbance. Insomnia was relatively more prevalent than PTE‐related nightmares among individuals with PTSD and among all PTE‐exposed individuals. A higher number of PTEs experienced significantly increased the likelihood of both trauma‐related nightmares and insomnia, McFadden's pseudo R² = .07, p < .001. Women exposed to PTEs were more likely to endorse experience of insomnia, χ²(1, N = 2,647) = 99.13, p < .001, φ = .194, and nightmares compared to men, χ²(1, N = 2,648) = 82.98, p < .001, φ = .177, but this gender difference was not significant among individuals with PTSD, ps = .130 and .050, respectively. Differences in sleep disturbance prevalence by PTE type were also examined. Implications for treatment and intervention and future directions are discussed.     

Mindfulness,Self‐Compassion,Posttraumatic Stress Disorder Symptoms,and Functional Disability in U.S. Iraq and Afghanistan War Veterans

Mindfulness and self‐compassion are overlapping, but distinct constructs that characterize how people relate to emotional distress. Both are associated with posttraumatic stress disorder (PTSD) and may be related to functional disability. Although self‐compassion includes mindful awareness of emotional distress, it is a broader construct that also includes being kind and supportive to oneself and viewing suffering as part of the shared human experience—a potentially powerful way of dealing with distressing situations. We examined the association of mindfulness and self‐compassion with PTSD symptom severity and functional disability in 115 trauma‐exposed U.S. Iraq/Afghanistan war veterans. Mindfulness and self‐compassion were each uniquely, negatively associated with PTSD symptom severity. After accounting for mindfulness, self‐compassion accounted for unique variance in PTSD symptom severity (f² = .25; medium ES). After accounting for PTSD symptom severity, mindfulness and self‐compassion were each uniquely negatively associated with functional disability. The combined association of mindfulness and self‐compassion with disability over and above PTSD was large (f² = .41). After accounting for mindfulness, self‐compassion accounted for unique variance in disability (f² = .13; small ES). These findings suggest that interventions aimed at increasing mindfulness and self‐compassion could potentially decrease functional disability in returning veterans with PTSD symptoms.     

Introduction to the Special Section on Complex Posttraumatic Stress Disorder (CPTSD): The Evolution of a Disorder

The inclusion of complex posttraumatic stress disorder (CPTSD) in the 11th revision of the International Classification of Diseases is an important development in the field of psychotraumatology. Complex PTSD was developed as a response to a clinical need to describe difficulties commonly associated with exposure to traumatic stressors that are predominantly of an interpersonal nature. With this special section, we bring attention to this common condition following exposure to traumatic stressors that only recently has been designated an official diagnosis. In this introduction, we review the history of CPTSD as a new condition and we briefly introduce the papers for the special section in the present issue of the Journal of Traumatic Stress. It is our hope that the work presented in the special section will add to an ever‐expanding evidence base. We also hope that this work inspires further research on the cultural validity of CPTSD, its assessment, and treatment.     

Depression Suppresses Treatment Response for Traumatic Loss–Related Posttraumatic Stress Disorder in Active Duty Military Personnel

There are multiple well‐established evidence‐based treatments for posttraumatic stress disorder (PTSD). However, recent clinical trials have shown that combat‐related PTSD in military populations is less responsive to evidence‐based treatments than PTSD in most civilian populations. Traumatic death of a close friend or colleague is a common deployment‐related experience for active duty military personnel. When compared with research on trauma and PTSD in general, research on traumatic loss suggests that it is related to higher prevalence and severity of PTSD symptoms. Experiencing a traumatic loss is also related to the development of prolonged grief disorder, which is highly comorbid with depression. This study examined the association between having traumatic loss–related PTSD and treatment response to cognitive processing therapy in active duty military personnel. Participants included 213 active duty service members recruited across two randomized clinical trials. Results showed that service members with primary traumatic loss–related PTSD (n = 44) recovered less from depressive symptoms than those who reported different primary traumatic events (n = 169), B = ?4.40. Tests of mediation found that less depression recovery suppressed recovery from PTSD symptoms in individuals with traumatic loss–related PTSD, B = 3.75. These findings suggest that evidence‐based treatments for PTSD should better accommodate loss and grief in military populations.     

Social Support Moderates Effects of Natural Disaster Exposure on Depression and Posttraumatic Stress Disorder Symptoms: Effects for Displaced and Nondisplaced Residents

Social support is a known protective factor against the negative psychological impact of natural disasters. Most past research has examined how the effects of exposure to traumatic events influences whether someone meets diagnostic criteria for depression and posttraumatic stress disorder (PTSD); it has also suggested sequelae of disaster exposure depends on whether survivors are displaced from their homes. To capture the full range of the psychological impact of natural disasters, we examined the buffering effects of social support on depressive symptoms and cluster‐specific PTSD symptoms, with consideration of displacement status. In a survey conducted 18 to 24 months after Hurricane Katrina, 810 adults exposed to the disaster reported the number of Katrina‐related traumatic events experienced, perceived social support 2 months post‐Katrina, and cluster‐specific PTSD and depressive symptoms experienced since Katrina. Analyses assessed the moderating effects of social support and displacement and the conditional effects of displacement status. Social support significantly buffered the negative effect of Katrina‐related traumatic events on depressive symptoms, B = ?0.10, p = .001, and avoidance and arousal PTSD symptoms, B = ?0.02, p = .035 and B = ?0.02, p = .042, respectively. Three‐way interactions were nonsignificant. Conditional effects indicated social support buffered development of depressive symptoms across all residents; however, the moderating effects of support on avoidance and arousal symptoms only appeared significant for nondisplaced residents. Results highlight the protective effects of disaster‐related social support among nondisplaced individuals, and suggest displaced individuals may require more formal supports for PTSD symptom reduction following a natural disaster.     

Posttraumatic Stress Disorder in a Nationally Representative Mexican Community Sample

This study describes the public health burden of trauma exposure and posttraumatic stress disorder (PTSD) in relation to the full range of traumatic events to identify the conditional risk of PTSD from each traumatic event experienced in the Mexican population and other risk factors. The representative sample comprised a subsample (N = 2,362) of the urban participants of the Mexican National Comorbidity Survey (2001?2002). We used the World Health Organization's Composite International Diagnostic Interview (CIDI) to assess exposure to trauma and the presence of PTSD according to the Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM‐IV; American Psychiatric Association, 1994 ) in each respondents’ self‐reported worst traumatic event, as well as a randomly selected lifetime trauma. The results showed that traumatic events were extremely common in Mexico (68.8%). The estimate of lifetime PTSD in the whole population was 1.5%; among only those with a traumatic event it was 2.1%. The 12‐month prevalence of PTSD in the whole population was 0.6%; among only those with a traumatic event it was 0.8%. Violence‐related events were responsible for a large share of PTSD. Sexual violence, in particular, was one of the greatest risks for developing PTSD. These findings support the idea that trauma in Mexico should be considered a public health concern.