John R. McQuaid

The Effects of Mindfulness Meditation on Cognitive Processes and Affect in Patients with Past Depression

This study describes the effects of an 8-week course in Mindfulness-Based Stress Reduction (MBSR; J. Kabat-Zinn, 1982, 1990) on affective symptoms (depression and anxiety), dysfunctional attitudes, and rumination. Given the focus of mindfulness meditation (MM) in modifying cognitive processes, it was hypothesized that the primary change in MM practice involves reductions in ruminative tendencies. We studied a sample of individuals with lifetime mood disorders who were assessed prior to and upon completion of an MBSR course. We also compared a waitlist sample matched with a subset of the MBSR completers. Overall, the results suggest that MM practice primarily leads to decreases in ruminative thinking, even after controlling for reductions in affective symptoms and dysfunctional beliefs.

Posttraumatic Stress Disorder in the Primary Care Medical Setting

Posttraumatic stress disorder (PTSD) is a prevalent disorder that adversely affects 2-5% of the general population. Little is known about PTSD in the primary care setting. The purpose of the present study was to evaluate the utility of a screening instrument for PTSD (the PCL-C) in primary care and to examine comorbidity, disability, and patterns of healthcare utilization among persons with PTSD in this setting. Adult, English-speaking patients attending for routine medical care (N=368) participated in a two-stage screening consisting of the administration of a self-report measure for posttraumatic stress disorder (the PCL-C) followed by a structured diagnostic interview. Current (1-month) prevalence of PTSD was determined, as were current comorbid disorders. Brief functional impairment and disability indices were administered, and healthcare utilization in the prior 6 months was ascertained. 11.8% (standard error 1.7%) of primary care attendees met diagnostic criteria for either full or partial PTSD. Comorbidity with major depression (61% of cases of PTSD) and generalized anxiety disorder (39%) was common, but less so with social phobia (17%) and panic disorder (6%). Substance use disorder comorbidity (22%) was also fairly common. Patients with PTSD reported significantly more functional impairment than patients without mental disorders. Patients with PTSD also made greater use of healthcare resources than not mentally ill patients. PTSD frequently is encountered in primary care, and is associated with considerable functional impairment and healthcare utilization. Comorbidity with other mood and anxiety disorders is extensive. It remains to be seen if greater awareness and more aggressive treatment of PTSD in primary care will lead to improved functioning and reduced (or more appropriate) healthcare utilization. These are topics for further study.

Dimensionality of posttraumatic stress symptoms: a confirmatory factor analysis of DSM-IV symptom clusters and other symptom models

Recent exploratory [Taylor, S., Kuch, K., Koch, W. J., Crockett, D. J., & Passey, G. (1998). The structure of posttraumatic stress symptoms. Journal of Abnormal Psychology, 107, 154-160.] and confirmatory [Buckley, T. C., Blanchard, E. B., & Hickling, E. J. (1998). A confirmatory factor analysis of posttraumatic stress symptoms. Behaviour Research and Therapy, 36, 1091-1099; King, D. W., Leskin, G. A., King, L. A., & Weathers, F. W. (1998). Confirmatory factor analysis of the clinician-administered PTSD scale: evidence for the dimensionality of posttraumatic stress disorder. Psychological Assessment, 10, 90-96.] factor analytic investigations suggest that the three symptom clusters of posttraumatic stress disorder (PTSD) as defined in the Diagnostic and Statistical Manual [4th ed.; DSM-IV; American Psychiatric Association (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Author.] may not provide the best conceptualization of symptom dimensionality. However, the alternative models have not been in agreement, nor have they been compared against each other or models based on the DSM-IV. The purpose of the present investigation was to test a series of dimensional models suggested by these recent factor analytic investigations and the DSM-IV. Using data collected with the PTSD Checklist--Civilian Version [Weathers, F. W., Litz, B. T., Huska, J. A., & Keane, T. M. (1994). PCL-C for DSM-IV. Boston: National Center for PTSD--Behavioral Science Division.] from 349 referrals to a primary care medical clinic, we used confirmatory factor analysis to evaluate a: (1) hierarchical four-factor model, (2) four-factor intercorrelated model, (3) hierarchical three-factor model, (4) three-factor intercorrelated model, and (5) hierarchical two-factor model. The hierarchical four-factor model (comprising four first-order factors corresponding to reexperiencing, avoidance, numbing, and hyperarousal all subsumed by a higher-order general factor) provided the best overall fit to the data; although, all models met some standards specified for good model fit. More research is needed to establish the dimensional nature of PTSD symptoms and to assess whether identified dimensions differ as a function of the trauma experience. Implications for assessment, diagnosis, and treatment are also discussed.

Depression in a primary care clinic : The prevalence and impact of an unrecognized disorder

BACKGROUND This study assesses depression among primary care patients, the relationship between depression and functioning, and how frequently depressed individuals receive mental health treatment. METHODS Two hundred and thirteen participants completed a diagnostic interview and measures of functional impairment and service utilization. RESULTS Sixty-two clinic patients were depressed, and depressed individuals experienced significant functional impairment even after controlling for comorbid anxiety disorders and medical problems. However, less than 40% of depressed individuals were receiving treatment for depression. Severity of impairment was related to likelihood of receiving mental health services. LIMITATIONS Several factors to consider when evaluating this study are the cross-sectional design, use of self-report data, and lack of random sampling. CONCLUSIONS These results show that depression has a unique and significant impact on the functioning of primary care patients, and emphasize the need for identification of depressive disorders in primary care.

Severity of psychosocial stress and outcome of alcoholism treatment

We examined the relation between stressful life events and drinking outcome among 129 male alcoholics who had completed an alcohol treatment program. Life events were assessed for the year prior to treatment and for the 3 months after treatment and were rated on the Psychiatric Epidemiology Research Interview and the Contextual Rating System. Approximately 40% of the pretreatment stressors were found to be directly or indirectly related to alcohol use. When stressors related to drinking were excluded from consideration, we found that men who returned to drinking after treatment experienced more severe or highly threatening stress before their relapse than men who remained abstinent during the follow-up period. These data suggest that although less severe stress may not increase risk for relapse, acute severe stressors and highly threatening chronic difficulties may be associated with elevated relapse risk.

Reported trauma, post-traumatic stress disorder and major depression among primary care patients

BACKGROUND Trauma is a necessary diagnostic criterion for post-traumatic stress disorder (PTSD). However, the nature of traumas experienced (e.g. assaultive versus non-assaultive) may influence whether any mental disorder will arise. Traumatic experiences may also be associated with other mental disorders, particularly major depressive disorder (MDD). This report examines the relationship of trauma history to the likelihood of full or partial PTSD and MDD. In addition, the study examines the frequency with which assaultive and non-assaultive traumas are reported by patients with full or partial PTSD and MDD. METHODS Three hundred eighty-six primary care patients completed psychiatric symptom measures during their clinic visit. A subset of 132 participants completed a diagnostic interview within 2 weeks following the screening. RESULTS Most patients reporting traumas did not meet criteria for a mental disorder. Patients reporting traumas were more likely to experience current MDD (27.8%) than current full or partial PTSD (20.0%) although a high percentage of patients with traumas (41.1%) had experienced full or partial PTSD diagnosis in their lifetime. Respondents reporting assaultive events as their most severe trauma, when compared with those whose most severe trauma was non-assaultive, were more likely to have met criteria for either full or partial PTSD in their lifetime, and were more likely to have current MDD. CONCLUSIONS These findings suggest that trauma history is often not associated with psychopathology, and when it is, trauma is often associated with major depression rather than PTSD. The likelihood of psychopathology is increased for individuals reporting assaultive traumas.

A comparison of two life stress assessment approaches: prospective prediction of treatment outcome in recurrent depression.

Research on life stress has been characterized by inconsistent results, which some researchers attribute to different assessment methodologies. Generally, studies have used either self-report checklists or investigator-based interviews. To test whether different results are derived from these approaches, the authors compared information from a self-report measure of life stress with the additional data available from a follow-up investigator-based measure in prospectively predicting the outcome of treatment for recurrent major depression. The 2 approaches produced different results, with investigator-based life events predicting lower probability of remission and self-report life events either predicting increased likelihood of remission or not predicting at all. The results demonstrated that methodology may account for some of the inconsistencies in the life stress literature.

Integrated Cognitive Behavioral Therapy Versus Twelve-Step Facilitation Therapy for Substance-Dependent Adults with Depressive Disorders

Abstract In a randomized trial, this study compared the longitudinal outcome patterns of veterans (N = 66) with substance use disorders and major depressive disorder receiving standard pharmacotherapy and either 12-Step Facilitation Therapy (TSF) or disorder-specific Integrated Cognitive Behavioral Treatment (ICBT). Depression and substance use were assessed at intake, during and after treatment using the Hamilton Depression Rating Scale and the Time Line Follow Back. Reductions in depression during treatment were comparable between the two treatment groups; however, their posttreatment patterns were distinct. While ICBT participants evidenced a steady linear decline in depression through six months posttreatment, a quadratic trend characterized TSF participants, for whom depression declined during treatment, but increased throughout posttreatment follow-up. During treatment, TSF participants used substances less frequently relative to those in ICBT; however, reductions in substance use were more stable through six months posttreatment among those in ICBT relative to TSF. While both interventions produced improvement in depression and substance use during treatment, ICBT may yield more stable clinical outcomes once treatment ceases.

Clinical Outcomes of an Integrated Treatment for Depression and Substance Use Disorders

The authors compared longitudinal treatment outcomes for depressed substance-dependent veterans (N = 206) assigned to integrated cognitive-behavioral therapy plus standard pharmacotherapy (ICBT + P) or 12-step facilitation therapy plus standard pharmacotherapy (TSF + P). Drug and alcohol involvement and depressive symptomology were measured at intake and at 3-month intervals during treatment and up to 1 year posttreatment. Participants in both treatment conditions showed decreased depression and substance use from intake. ICBT + P participants maintained improvements in substance involvement over time, whereas TSF + P participants had more rapid increases in use in the months following treatment. Decreases in depressive symptoms were more pronounced for TSF + P than ICBT + P in the 6 months posttreatment. Within both treatment groups, higher attendance was associated with improved substance use and depression outcomes over time. Initial levels of depressive symptomology had a complex predictive relationship with long-term depression outcomes. Early treatment response predicted long-term substance use outcomes for a portion of the sample. Although both treatments were associated with improvements in substance use and depression, ICBT + P may lead to more stable substance use reductions compared with TSF + P.

Effectiveness of Imagery Rehearsal Therapy for the Treatment of Combat-Related Nightmares in Veterans

Imagery Rehearsal Therapy (IRT) has been shown to be efficacious in reducing nightmares, but the treatment has not been well-studied in veterans. The effectiveness of IRT was assessed from a chart review of veterans seeking outpatient treatment for chronic, trauma-related nightmares. Of those offered IRT, veterans who completed a full course of treatment for PTSD in the past year were more likely to initiate treatment. However, completion of IRT was not related to previous treatment, demographic variables, or nightmare severity reported at the first treatment session. Treatment completers reported significant reductions in nightmare frequency and intensity, severity of insomnia, and subjective daytime PTSD symptoms. Insomnia and PTSD symptoms, on average, were below clinical cutoffs following treatment, and 23% of patients showed a complete treatment response (< or =1 nightmare/week). Findings suggest IRT may be an effective short-term treatment for nighttime and daytime PTSD symptoms among veterans who complete a full course of treatment.