Substance Abuse and Posttraumatic Stress Disorder

The relationship between substance use and posttraumatic stress disorder in a methadone maintenance treatment program

INTRODUCTION AND AIMS

Posttraumatic stress disorder (PTSD) is frequently linked with substance abuse. The self-medication hypothesis suggests that some people may use illicit substances in an attempt to self-treat psychiatric symptoms. This study explores the relationship between substance abuse and PTSD symptom clusters in a methadone maintenance population.

DESIGN AND METHODS

Clients of a methadone maintenance program at a public Drug and Alcohol Service were invited to complete the PTSD Checklist-Civilian Version, a screening tool for PTSD. Information about their history of substance use was also collected.

RESULTS

Eighty clients (43 female, 37 male), aged 35 ± 8.0 years (mean ± SD), participated in the study, of which 52.7% screened positive for PTSD. Severity of marijuana use was significantly associated with a number of reexperiencing and hyperarousal symptoms and with overall severity of PTSD symptoms. Opiate, amphetamine, and benzodiazepine use did not appear to be related to PTSD symptoms.

DISCUSSION AND CONCLUSIONS

In this sample, marijuana may be used to self-treat certain PTSD symptoms, supporting the self-medication hypothesis. Further research is required to confirm the association between a diagnosis of PTSD and substance use. Given the high prevalence of PTSD in the substance-using population, routine PTSD screening in the substance abuse treatment setting may be justified.

Posttraumatic stress disorder, poor physical health and substance use behaviors in a national trauma-exposed sample

Both experiencing a traumatic event and PTSD are related to physical health problems (e.g., Schnurr and Jankowski, 1999) and health-risk behavior (e.g., Stewart, 1996). Using structural equation modeling analyses, we examined the interrelationships among number of distinct traumatic event exposures, PTSD diagnosis, physical health, and substance use behavior using epidemiological data from the National Comorbidity Survey Replication (NCS-R; Kessler et al., 2004). Results provide some evidence that PTSD mediates the relationship between: (a) number of distinct traumatic event exposures and poor physical health defined by clusters of difficulties with gastrointestinal, musculoskeletal, and/or cardiovascular health, and (b) number of distinct traumatic event exposures and substance use behaviors. However, substance use behaviors did not significantly mediate the relationship between PTSD and poor physical health.

Examining the role of emotional avoidance in the relationship between posttraumatic stress disorder symptom severity and worry

A growing body of literature suggests that worry is a cognitive activity functioning to avoid unpleasant internal experiences such as negative thoughts, emotions, and somatic responses. Given the highly aversive internal events associated with posttraumatic stress disorder (PTSD), individuals experiencing PTSD symptoms following exposure to a traumatic event may be particularly motivated to engage in avoidant regulation strategies such as worry. Surprisingly, however, few studies to date have examined the relationship between PTSD and worry as well as potential factors that might explain this association. Therefore, the goal of this study was to examine the association between PTSD symptom severity and worry and the extent to which emotional avoidance explains this relationship. To this end, 207 college students with a history of traumatic exposure (meeting Criterion A for a PTSD diagnosis) completed a series of questionnaires assessing history of exposure to potentially traumatic events, PTSD symptom severity, emotional avoidance tendencies, and worry. Results demonstrated that PTSD symptom severity was positively associated with worry and emotional avoidance. Further, emotional avoidance was found to fully account for this relationship, providing support for the proposed emotionally avoidant function of worry. The implications of these findings for future research and the treatment of worry among individuals with a history of traumatic exposure are discussed.

The Relationship Between Emotion Dysregulation and Deliberate Self-Harm Among Inpatients with Substance Use Disorders

Despite the emphasis on the role of emotion dysregulation in deliberate self-harm (DSH), no studies have examined this association among patients with substance use disorders (SUD). This study examined if emotion dysregulation is heightened among SUD inpatients with (vs. without) DSH, and if the association between DSH and emotion dysregulation remains significant when controlling for their shared association with risk factors for both, including borderline personality disorder (BPD), posttraumatic stress disorder (PTSD), childhood abuse, and substance use severity. Findings indicate heightened emotion dysregulation among SUD patients with (vs. without) DSH, and provide evidence of a unique association between emotion dysregulation and DSH when controlling for BPD, PTSD, childhood abuse, and substance use severity. Findings also highlight the particular relevance of three dimensions of emotion dysregulation to DSH among SUD patients: limited access to effective emotion regulation strategies, difficulties engaging in goal-directed behaviors when distressed, and emotional nonacceptance.

Psychiatric diagnoses and punishment for misconduct: the effects of PTSD in combat-deployed Marines

BACKGROUND

Research on Vietnam veterans suggests an association between psychological problems, including posttraumatic stress disorder (PTSD), and misconduct; however, this has rarely been studied in veterans of Operation Iraqi Freedom or Operation Enduring Freedom. The objective of this study was to investigate whether psychological problems were associated with three types of misconduct outcomes (demotions, drug-related discharges, and punitive discharges.)

METHODS

A population-based study was conducted on all U.S. Marines who entered the military between October 1, 2001, and September 30, 2006, and deployed outside of the United States before the end of the study period, September 30, 2007. Demographic, psychiatric, deployment, and personnel information was collected from military records. Cox proportional hazards regression analysis was conducted to investigate associations between the independent variables and the three types of misconduct in war-deployed (n = 77,998) and non-war-deployed (n = 13,944) Marines.

RESULTS

Marines in both the war-deployed and non-war-deployed cohorts with a non-PTSD psychiatric diagnosis had an elevated risk for all three misconduct outcomes (hazard ratios ranged from 3.93 to 5.65). PTSD was a significant predictor of drug-related discharges in both the war-deployed and non-war-deployed cohorts. In the war-deployed cohort only, a specific diagnosis of PTSD was associated with an increased risk for both demotions (hazard ratio, 8.60; 95% confidence interval, 6.95 to 10.64) and punitive discharges (HR, 11.06; 95% CI, 8.06 to 15.16).

CONCLUSIONS

These results provide evidence of an association between PTSD and behavior problems in Marines deployed to war. Moreover, because misconduct can lead to disqualification for some Veterans Administration benefits, personnel with the most serious manifestations of PTSD may face additional barriers to care.

Psychological trauma and substance abuse: the need for an integrated approach

There is consensus that an integrated approach which addresses the clinical needs of individuals who have histories of substance abuse and psychological trauma concurrently is an acceptable and preferred approach to treatment. Several integrated models have emerged in recent years. In this paper we first define the concepts of substance abuse and psychological trauma, investigate the relationship between both and proceed to discuss why an integrated approach is most compelling. Finally, we review and critically examine the different integrated models that have been developed in terms of efficacy, effectiveness and empirical evidence. The paper concludes with suggestions on how the field can be improved.

A preliminary examination of the relationships between posttraumatic stress symptoms and crack/cocaine, heroin, and alcohol dependence

High rates of co-occurrence between posttraumatic stress (PTS) and substance use disorders (SUDs) have led to the suggestion that substance use among individuals experiencing PTS symptoms might serve a self-medication function. However, research is still needed to provide a more comprehensive evaluation of the unique associations between PTS symptom clusters and substances (licit and illicit) with both anxiolytic/depressant and stimulant properties. Consequently, this study examined the relationship between severity of different PTS symptom clusters and heroin, crack/cocaine, and alcohol dependence among 48 treatment-seeking SUD patients with a history of traumatic exposure. No evidence was found for a relationship between PTS symptom clusters and crack/cocaine or alcohol dependence; however, results suggested a relationship between hyperarousal and avoidance (inversely related) symptoms and heroin dependence. Results are discussed in terms of their implications for understanding motivations underlying the substance of choice among individuals with PTS symptoms, as well as the development of treatments for co-occurring PTS and SUDs.

A cognitive behavioral therapy for co-occurring substance use and posttraumatic stress disorders

Co-occurring posttraumatic stress disorder (PTSD) is prevalent in addiction treatment programs and a risk factor for negative outcomes. Although interventions have been developed to address substance use and PTSD, treatment options are needed that are effective, well tolerated by patients, and potentially integrated with existing program services. This paper describes a cognitive behavioral therapy (CBT) for PTSD that was adapted from a treatment for persons with severe mental illnesses and PTSD in community mental health settings. The new adaptation is for patients in community addiction treatment with co-occurring PTSD and substance use disorders. In this study, 5 community therapists delivered the CBT for PTSD. Outcome data are available on 11 patients who were assessed at baseline, post-CBT treatment, and at a 3-month follow-up post-treatment. Primary outcomes were substance use, PTSD severity, and retention, of which all were favorable for patients receiving the CBT for PTSD.

Mental health and rape history in relation to non-medical use of prescription drugs in a national sample of women

The current study examined prevalence and correlates of non-medical use of prescription drugs (NMUPD), with particular emphasis on lifetime history of rape and PTSD as risk associates. Interviews conducted via telephone using Computer-Assisted Telephone Interviewing technology, resulting in a nationally representative sample of 3001 non-institutionalized, civilian, English or Spanish speaking women (aged 18-86 years) residing in households with a telephone. Demographic characteristics, rape history, general health/mental health, and substance abuse variables were assessed. NMUPD was assessed by asking if, in the past year, participants had misused a prescription drug. Multivariable logistic regressions were conducted for each theoretically derived predictor set. Significant predictors from each set then entered into final multivariable logistic regression to determine significant predictors of past-year NMUPD. NMUPD was endorsed by 5.5% of the sample (n=164). Final multivariable model showed that Lifetime Posttraumatic Stress Disorder, other forms of substance use/abuse, and a history of drug or alcohol facilitated rape were significantly associated with increased likelihood of NMUPD. Risk reduction efforts targeting non-medical prescription drug use among women who have experienced traumatic events and/or abuse substances are warranted. Trauma-focused interventions for drug or alcohol facilitated rape victims should include treatment or prevention modules that specifically address NMUPD.

The role of anxiety sensitivity and difficulties in emotion regulation in posttraumatic stress disorder among crack/cocaine dependent patients in residential substance abuse treatment

Current research suggests the importance of anxiety sensitivity (AS) in the risk for posttraumatic stress disorder (PTSD), and a growing body of research has demonstrated that difficulties in emotion regulation may also play a role. This study examined the unique relationships between AS dimensions, difficulties in emotion regulation, and a probable PTSD diagnosis among a sample of inner-city crack/cocaine dependent patients in residential substance abuse treatment. Probable PTSD participants exhibited higher levels of the AS dimension of social concerns and emotion regulation difficulties. Emotion regulation difficulties reliably distinguished probable PTSD participants from non-PTSD participants above and beyond both anxiety symptom severity and the AS dimension of social concerns. Further, social concerns did not account for unique variance when difficulties in emotion regulation was entered into the model. Results provide support for the central role of difficulties in emotion regulation relative to AS dimensions in the prediction of PTSD within a crack/cocaine dependent population.

Posttraumatic stress disorder and other psychopathology in substance abusing patients

Studies demonstrating greater problem severity in substance abuse patients with posttraumatic stress disorder (PTSD) versus those without have rarely considered other co-occurring psychiatric disorders. This study of 466 male veterans recently admitted to outpatient substance abuse treatment attempts to identify problems associated with PTSD versus those associated with other nonsubstance use Axis I disorders. Problem severity, particularly psychiatric, was examined across four groups of patients with substance use disorders (SUDs). Those with: 1, SUDs only (SU-Only); 2, PTSD, but no other Axis I disorders (SU+PTSD); 3, PTSD and other Axis I disorders (SU+PTSD+Axis I); and 4, no PTSD, but other Axis I disorders (SU+other Axis I). Results suggested a hierarchy of psychiatric, and to a lesser extent, other life problem severities associated with these diagnostic groupings. The most severe group was SU+PTSD+Axis I, followed in decreasing severity by the SU+other Axis I, SU+PTSD, and SU-Only groups. Additional analyses comparing the SU+PTSD+Axis I patients with a subgroup of Axis I patients with more than one Axis I disorder (SU+multiple Axis I) revealed few group differences except for more lifetime suicide attempts and psychiatric hospitalizations in the SU+PTSD+Axis I group. The findings suggest that it is not PTSD per se, but the frequent co-occurrence of PTSD and other psychopathology that largely accounts for previously reported greater problem severity of SUD patients with PTSD.

The effect of posttraumatic stress disorder on risk-taking propensity among crack/cocaine users in residential substance abuse treatment

BACKGROUND

The co-occurrence of posttraumatic stress disorder (PTSD) and substance use disorders (SUDs) has been found to be associated with a range of negative clinical outcomes (e.g., relapse, suicide, legal problems, HIV infection). However, less is known about the particular factors that may be placing individuals with a co-occurring PTSD and SUD diagnosis at risk for these outcomes. The construct of risk-taking propensity may hold particular promise.

METHODS

To investigate the relevance of risk-taking propensity to PTSD-SUD patients, differences in risk-taking propensity were examined among 90 crack/cocaine dependent patients in residential substance abuse treatment with (n=20) or without (n=70) a current PTSD diagnosis. Risk-taking propensity was assessed using an established behaviorally based measure, the Balloon Analogue Risk Task (BART).

RESULTS

Crack/cocaine dependent patients with PTSD exhibited significantly greater levels of risk-taking propensity than patients without PTSD, and this difference remained significant even when controlling for the presence of comorbid psychiatric disorders and current psychotropic medication use. No evidence was found for a different pattern of change in risk-taking propensity from the beginning to the end of the task as a function of PTSD status.

CONCLUSIONS

Although preliminary, results suggest the need to further investigate risk-taking propensity as a factor that may be associated with the negative clinical outcomes observed among crack/cocaine users with PTSD.

Association of psychiatric and substance use disorder comorbidity with cocaine dependence severity and treatment utilization in cocaine-dependent individuals

The relations among psychiatric and substance dependence disorders and treatment utilization are of interest both for their clinical management and for health services. We examined these relations using six self-reported indices of cocaine dependence severity and three self-reported measures of treatment utilization and self-help group participation for cocaine dependence. The sample consisted of dyads: namely, a cocaine-dependent adult proband (N=449) and a cocaine-dependent sibling (N=449). Psychiatric and substance use disorders were assessed with the Semi-structured Assessment for Drug Dependence and Alcoholism. We controlled for the nesting within families of proband-sibling dyads and for demographic features using generalized estimating equation linear and logistic regression analyses. We found that psychiatric disorders were associated with an increased likelihood of cocaine dependence treatment or self-help group participation, but with only one of six indices of cocaine dependence severity. Bipolar disorder and antisocial personality disorder were associated with greater past heavy cocaine use, and with utilizing self-help but not treatment. Major depressive disorder and posttraumatic stress disorder were associated with treatment utilization and overall services utilization, respectively. The presence of other substance use disorders (SUDs) was the strongest correlate of cocaine dependence severity. Results suggest that co-occurring substance dependence and psychiatric disorders warrant attention in cocaine dependence assessment, treatment, and self-help.

Does sexual victimization predict subsequent alcohol consumption? A prospective study among a community sample of women

Although rape and sexual victimization experiences have been hypothesized to contribute to subsequent heavy drinking and alcohol problems among women, little prospective evidence exists. The present prospective study examined whether sexual victimization contributes to subsequent heavy drinking among a community sample of women, 18-30 years of age (n=927). Using three waves of data, 12 months apart, we examined the impact of T1 sexual victimization on T2 heavy drinking, and of T2 sexual victimization on T3 heavy drinking. There were significant bivariate differences between sexually victimized and non-victimized women on heavy drinking both concurrently and prospectively. However, after controlling for prior heavy drinking and demographic variables, most differences disappeared. We also tested the hypothesis that Post-Traumatic Stress Disorder (PTSD) Symptoms would mediate the relationship between T2 sexual victimization and T3 heavy drinking. Although T2 sexual victimization predicted T2 PTSD symptoms, PTSD did not contribute to subsequent heavy drinking. Findings suggest that heavy drinking is relatively stable over time and that sexual victimization does not make a substantial independent contribution to heavy drinking among women in the general population.

Targeting trauma-related interventions and improving outcomes for women with co-occurring disorders

National attention to the effects of interpersonal trauma has led mental health systems to adopt policies on trauma-related services; however, there is a lack of clarity regarding targeting of these services. Data from the Women, Co-occurring Disorders and Violence Study (WCDVS) were reanalyzed by grouping women on their baseline PTSD and substance abuse presentation and assessing the differential response to an integrated mental health/substance abuse intervention. Treatment effects were largest for subgroups characterized by high levels of PTSD, whereas the effects for those in the low symptom group were near zero. These findings underscore the need for clinicians to conduct careful assessments of trauma-related symptoms and to target the most intensive trauma-related interventions to individuals with PTSD symptoms.

University of Rhode Island Change Assessment-Trauma: preliminary psychometric properties in an alcohol-dependent PTSD sample

The co-occurrence of posttraumatic stress disorder with substance use disorders (PTSD-SUD) is common and is associated with poorer treatment outcomes. Attrition represents an ongoing, but poorly understood challenge in PTSD-SUD treatment research. The current study examined the initial psychometric properties of the University of Rhode Island Change Assessment-Trauma (URICA-T), a scale designed to assess attitudes and behaviors related to addressing trauma issues, in a sample of 42 individuals meeting diagnostic criteria for PTSD and alcohol dependence. Results suggest that the URICA-T may have acceptable psychometric properties as a continuous measure of motivational readiness in a PTSD-SUD sample. Preliminary data also suggests higher URICA-T scores are associated with retention of alcohol dependent-PTSD participants in a study utilizing trauma-focused exposure.

Fear and avoidance of internal experiences among patients with substance use disorders and PTSD: the centrality of anxiety sensitivity

This study evaluated anxiety sensitivity, cognitive avoidance, and alexithymia and their relationship to posttraumatic stress disorder (PTSD) and alcohol use indices concurrently and prospectively in an outpatient substance abuse treatment sample that screened positive for PTSD (N=58). Anxiety sensitivity accounted for substantial variance in the PTSD clusters, reexperiencing, avoidance, and hyperarousal, both concurrently and prospectively. Cognitive avoidance accounted for additional variance with concurrent PTSD avoidance symptoms. Anxiety sensitivity and cognitive avoidance were largely not associated with alcohol use indices. Alexithymia was largely redundant with cognitive avoidance and was, therefore, not included in the regression analyses. Theoretical and treatment implications of these findings are discussed in the context of individuals with dually diagnosed PTSD and substance abuse disorders.

Alcohol problems and posttraumatic stress disorder in female crime victims

Comorbidity between alcohol use and posttraumatic stress disorder (PTSD) has been well documented. However, there are few longitudinal studies with acute trauma samples. The present study examined symptoms of alcohol use disorders (AUDs) and PTSD longitudinally after assault. Female sexual (n = 69) and physical assault victims (n = 39) were assessed 2 to 4 weeks and 3 months post trauma. Women who had lifetime AUD had higher intrusive and avoidance symptoms than those who did not have AUD. Women who had any alcohol problems had higher PTSD symptoms. Participants who had alcohol problems had the same pattern of symptom recovery as those who did not have alcohol problems but remained more symptomatic over the 3 months. These findings suggest that early intervention strategies for women who have previous histories of alcohol problems and seek medical attention early post trauma may be indicated.

Incidence and impact of posttraumatic stress disorder and comorbid depression on adherence to HAART and CD4+ counts in people living with HIV

Recent research suggests that the presence of posttraumatic stress disorder (PTSD) and depressive symptoms is independently related to abnormal hormone levels, inadequate medication adherence, and faster HIV disease progression. Although PTSD and depression occur comorbidly at high rates, the impact of both disorders on adherence and disease progression has not been examined. The present study examined the impact of PTSD and comorbid depression on CD4 cell counts and medication adherence in 58 male and 11 female (36% African American) HIV-positive individuals recruited from an AIDS service organization. Results revealed that participants high in depressive symptoms had lower CD4 cell counts and were less likely to adhere to their medication regimens than participants high in PTSD symptoms and those high in comorbid symptomatology. The present results suggest that the presence of depressive symptoms may be responsible for the observed impact of PTSD on people living with HIV (PLWH), and that failure to examine comorbid disorders may not adequately address the impact of clinical symptoms on people living with HIV.