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Posttraumatic stress disorder (PTSD) symptoms have been linked to sleep disturbances. Limited work has explored how positive affect processes may account for this relationship. Advancing research in this area, we utilized a multi-study design to investigate the role of positive affect processes (levels of positive affect, positive emotionality, hedonic deficits, negative affect interference) in the PTSD-sleep association.Data from 149 trauma-exposed firefighters (MPositive affect levels (b = 0.03, 95 % confidence interval [CI] [0.01, 0.06]; firefighter sample), positive emotionality (b = 0.07, CI [0.03, 0.13]; community sample), and negative affect interference (b = 0.06, CI [0.01, 0.14]; community sample) significantly accounted for the associations between PTSD symptom severity and sleep disturbances controlling for the effects of gender and age.Findings highlight the role of positive affect processes in the link between PTSD and sleep, and support addressing positive affect processes as potential targets in clinical interventions for co-occurring PTSD-sleep problems.

Background Research over the past two decades supports emotion regulation as a transdiagnostic factor related to the etiology, maintenance, and treatment of a wide range of psychiatric difficulties and risky behaviors. However, prior investigations are limited by their focus on difficulties regulating negative (but not positive) emotions. Further, research has not accounted for the heterogeneity in difficulties regulating emotions. Methods Participants were 210 female victims of domestic violence (DV; M age = 36.14, 48.6% African American) who completed measures assessing emotion regulation (Difficulties in Emotion Regulation Scale; Difficulties in Emotion Regulation Scale – Positive), posttraumatic stress disorder (PTSD; Posttraumatic Stress Diagnostic Scale), depression (Center for Epidemiologic Studies-Depression Scale), alcohol misuse (Alcohol Use Disorder Identification Test) and drug misuse (Drug Abuse Screening Test). Latent profile analysis was utilized to identify subgroups of DV-victimized women who were similar in endorsed difficulties in regulating negative and positive emotions. Differences in psychiatric difficulties (i.e., PTSD and depressive symptom severity) and risky behaviors (i.e., alcohol and drug misuse) were examined across these classes. Results Three classes of DV-victimized women differentiated by levels of difficulties regulating negative and positive emotions were identified. Greater psychiatric difficulties were found among classes defined by higher levels of difficulties regulating emotions, regardless of emotion valence. Risky behaviors were more prevalent among the class defined by higher levels of difficulties regulating both negative and positive emotions. Limitations Although results add to the literature on difficulties regulating emotions and their correlates, findings must be interpreted in light of limitations present including use of a cross-sectional and correlation design, reliance on self-report measures, and assessment of a select sample of women victims of DV. Conclusions Results highlight the potential importance of tailoring interventions accounting for the heterogeneity in negative and positive emotion regulation dimensions among DV-victimized women.

Background We assessed item-to-item correspondence between the Patient Health Questionnaire-9 (PHQ-9) and the Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I) major depression episode portion of the major depressive module. Method Four hundred and ninety-eight soldiers in the Ohio National Guard were administered the PHQ-9 and SCID-I. Data were analyzed using chi-square analyses, logistic regression, receiver operating characteristic (ROC) curve analyses and diagnostic efficiency statistics. Results To screen for depression effectively, results indicate use of the cardinal first two items, items representing fatigue, appetite and sleep changes with an item level cut-off point of two, and the item representing suicidal ideation with item level cut-off point of one. Further, total PHQ-9 scores significantly predicted SCID-I major depressive episode (MDE) and diagnosis (MDD) with moderate accuracy. Lastly, the cut-off total score of 10 had the optimal balance of sensitivity and specificity compared to other PHQ-9 scoring options. Limitations Differences in timeline of administration of the measures, differences in “worst episode” reference between the measures, and use of a specific military population are some of the limitations. Conclusions This validation study provides guidelines for the use of the telephone-administered PHQ-9 in assessing the lifetime prevalence of a major depressive episode and diagnosis in non-clinical populations, with implications for clinical use.

Background In the present study, the authors investigated the relationship between the underlying symptom dimensions of posttraumatic stress disorder (PTSD) and dimensions of major depressive disorder (MDD). Method A sample of 1266 Ohio National Guard soldiers with a history of overseas deployment participated and were administered the PTSD Checklist (assessing PTSD) and Patient Health Questionnaire-9 (assessing depression). Results Using confirmatory factor analysis, results demonstrated that both PTSD's dysphoria and hyperarousal factors were more related to depression's somatic than non-somatic factor. Furthermore, depression's somatic factor was more related to PTSD's dysphoria than hyperarousal factor. Limitations Limitations of this study include the use of self-report measures and a predominately male military sample. Conclusions Results indicate that PTSD's dysphoria factor is related to depression specifically by way of depression's somatic construct. Given PTSD's substantial dysphoria/distress component, these results have implications for understanding the nature of PTSD's high comorbidity with depression.

Background Posttraumatic stress disorder (PTSD) and depression co-occur frequently following the experience of potentially traumatizing events (PTE; Morina et al., 2013). A person-centered approach to discern heterogeneous patterns of such co-occurring symptoms is recommended (Galatzer-Levy and Bryant, 2013). We assessed heterogeneity in PTSD and depression symptomatology; and subsequently assessed relations between class membership with psychopathology constructs (alcohol use, distress tolerance, dissociative experiences). Methods The sample consisted of 268 university students who had experienced a PTE and susequently endorsed clinical levels of PTSD or depression severity. Latent profile analyses (LPA) was used to identify the best-fitting class solution accouring to recommended fit indices (Nylund et al., 2007a); and the effects of covariates was analyzed using a 3-step approach (Vermunt, 2010). Results Results of the LPA indicated an optimal 3-class solutions: high severity (Class 2), lower PTSD-higher depression (Class 1), and higher PTSD-lower depression (Class 3). Covariates of distress tolerance, and different kinds of dissociative experiences differentiated the latent classes. Limitations Use of self-report measure could lead to response biases; and the specific nature of the sample limits generalizability of results. Conclusion We found evidence for a depressive subtype of PTSD differentiated from other classes in terms of lower distress tolerance and greater dissociative experiences. Thus, transdiagnostic treatment protocols may be most beneficial for these latent class members. Further, the distinctiveness of PTSD and depression at comparatively lower levels of PTSD severity was supported (mainly in terms of distress tolerance abilities); hence supporting the current classification system placement of these disorders.

Background: Posttraumatic stress disorder (PTSD) and major depressive disorder (MDD) are highly comorbid (Elhai et al., 2008. J. Clin. Psychiatry, 69, (4), 597–602). Rumination is a cognitive mechanism found to exacerbate and maintain both PTSD and MDD (Elwood et al., 2009. Clin. Psychol. Rev. 29, (1), 87– 100; Olatunji et al., 2013. Clin. Psychol.: Sci. Pract. 20, (3), 225–257). Aims: Assess whether four rumination subtypes moderate the relationship between comorbid PTSD and MDD symptoms. Method: We consecutively sampled patients (N ¼45) presenting to a mental health clinic using selfreport measures of PTSD and MDD symptoms, and rumination in a cross-sectional design. Results: Repetitive rumination moderates the relationship between PTSD and MDD symptoms at one standard deviation above the mean ( β¼.044, p¼.016), while anticipatory rumination moderates the relationship between PTSD and MDD symptoms at mean levels and higher levels of anticipatory rumination (mean β¼.030, p ¼.042; higher β¼.060, p ¼.008). Discussion: Repetitive and anticipatory rumination should be assessed in the context of comorbid PTSD and MDD and interventions should focus on reducing these rumination subtypes. Limitations: Results should be replicated with other trauma populations because the number and complexity of traumatic events may impact the assessed symptoms. Constructs should also be assessed longitudinally, in order to establish causality. We are unable to confirm why rumination styles moderated the relationship between PTSD and depression or why counterfactual thinking and problem-focused thinking did not moderate the relationship between the two constructs.