The psychophysiology of generalized anxiety disorder: 1. Pretreatment characteristics

Generalized anxiety disorder (GAD) patients have been reported to have more muscle tension than controls, which has provided a rationale for treating them with muscle relaxation therapies (MRT). We tested this rationale by comparing 49 GAD patients with 21 controls. Participants underwent 5-min relaxation tests, during which they either just sat quietly (QS) or sat quietly and tried to relax (R). GAD patients reported themselves to be more worried during the assessment than the controls, had higher heart rates and lower end-tidal pCO2, but not higher muscle tension as measured by multiple EMGs. QS and R did not differ on most psychological and physiological measures, indicating that intention to relax did not affect speed of relaxation. In the GAD group, self-reported anxiety was not associated with electromyographic or autonomic measures. We conclude that GAD is not necessarily characterized by chronic muscle tension, and that this rationale for MRT should be reconsidered.     

Treatment of generalized anxiety disorder in older adults

Older adults with generalized anxiety disorder (GAD; N = 75; M age = 67.1 years) were randomly assigned to cognitive-behavioral therapy (CBT), a discussion group (DG) organized around worry-provoking topics, or a waiting period. Participants in both active conditions improved relative to the waiting list. Although CBT participants improved on more measures than DG participants, the authors found only I significant difference immediately after treatment and no differences at 6-month follow-up. Effect sizes were smaller than in younger samples, but CBT showed large effects and DG showed medium-sized effects Overall, results indicate that brief treatment of late-life GAD is beneficial, but they provide only limited support for the superiority of CBT to a credible comparison intervention.     

Worry, generalized anxiety disorder, and emotion: evidence from the EEG gamma band

The present study examined EEG gamma (35-70Hz) spectral power distributions during worry inductions in participants suffering from generalized anxiety disorder (GAD) and in control participants without a history of psychiatric illness. As hypothesized, the EEG gamma band was useful for differentiating worry from baseline and relaxation. During worry induction, GAD patients showed higher levels of gamma activity than control participants in posterior electrode sites that have been previously associated with negative emotion. Gamma fluctuations in these electrode sites were correlated with subjective emotional experience ratings lending additional support to interpretations of negative affect. Following 14 weeks of psychotherapy, the GAD group reported less negative affect with worry inductions and the corresponding gamma sites that previously differentiated the clinical from control groups changed for the GAD patients in the direction of control participants. These findings suggest converging evidence that patients suffering from GAD experience more negative emotion during worry and that the EEG gamma band is useful for monitoring fluctuations in pathological worry expected to follow successful treatment.     

Stretch-based relaxation training

This paper is a review of progressive relaxation training based on muscle stretching exercises. Stretch-based relaxation training is an alternative to traditional tense-release methods for teaching self-regulation of muscle activity. The rationale and basic procedures for stretch-based relaxation are presented, along with a review of research studies exploring the clinical efficacy of the techniques. Experimental evidence has demonstrated decreases in subjective measures of muscle tension and activation, as well as decreases in EMG activity at selected target muscle sites when stretch-based relaxation procedures are employed. The clinical application of stretch-based relaxation is presented and illustrated with a case study describing the use of these procedures to assist in the treatment of neck tension/pain and anxiety. Discussion centers on the potential role of stretch-based relaxation in the management of anxiety and musculoskeletal disorders.     

Attribution retraining group therapy for outpatients with major depression disorder, generalized anxiety disorder, and obsessive-compulsive disorder: a pilot study

The aim of this present study is to examine the efficacy of attribution retraining group therapy (ARGT) and to compare the responses of outpatients with major depression disorder (MDD),generalized anxiety disorder (GAD) and obsessive-compulsive disorder (OCD).We carried out a prospective uncontrolled intervention study with a 8-weeks of ARGT on sixty three outpatients with MDD,GAD or OCD.Hamilton rating scale for depression,Hamilton rating scale for anxiety,Yale-Brown obsessive-compulsive scale,attribution style questionnaire,self-esteem scale,index of well-being,and social disability screening schedule were administered before and after treatment.Significant improvement in symptoms and psychological and social functions from pre-to posttreatment occurred for all participants.The changes favored MDD patients.Our study suggested that ARGT may improve the symptoms and psychological-social functions of MDD,GAD,and OCD patients.MDD patients showed the best response.     

Group cognitive-behavioral therapy for generalized anxiety disorder: treatment outcome and long-term follow-up

A recently developed cognitive-behavioral treatment for generalized anxiety disorder (GAD) targets intolerance of uncertainty by the reevaluation of positive beliefs about worry, problem-solving training, and cognitive exposure. As previous studies have established the treatment's efficacy when delivered individually, the present study tests the treatment in a group format as a way to enhance its cost-benefit ratio. A total of 52 GAD patients received 14 sessions of cognitive-behavioral therapy in small groups of 4 to 6 participants. A wait-list control design was used, and standardized clinician ratings and self-report questionnaires assessed GAD symptoms, intolerance of uncertainty, anxiety, depression, and social adjustment. Results show that the treatment group, relative to the wait-list group, had greater posttest improvement on all dependent variables and that treated participants made further gains over the 2-year follow-up phase of the study.     

Specificity of treatment effects: cognitive therapy and relaxation for generalized anxiety and panic disorders

The aim of this study was to address claims that among bona fide treatments no one is more efficacious than another by comparing the relative efficacy of cognitive therapy (CT) and relaxation therapy (RT) in the treatment of generalized anxiety disorder (GAD) and panic disorder without agoraphobia (PD). Two fixed-effects meta-analyses were conducted, for GAD and PD separately, to review the treatment outcome literature directly comparing CT with RT in the treatment of those disorders. For GAD, CT and RT were equivalent. For PD, CT, which included interoceptive exposure, outperformed RT on all panic-related measures, as well as on indices of clinically significant change. There is ample evidence that both CT and RT qualify as bona fide treatments for GAD and PD, for which they are efficacious and intended to be so. Therefore, the finding that CT and RT do not differ in the treatment of GAD, but do for PD, is evidence for the specificity of treatment to disorder, even for 2 treatments within a CBT class, and 2 disorders within an anxiety class.     

Palmtop computer-assisted group therapy for social phobia

This article describes the application of group computer-assisted therapy for social phobia. The computer program includes a diary function for ongoing self-monitoring of anxiety as well as guidance on the practice of relaxation, cognitive restructuring, and self-control desensitization. Although the program was originally designed to treat individuals with generalized anxiety disorder (GAD), it was hypothesized that the program also would be effective for individuals with social phobia; therefore, it was implemented in a group of individuals with a primary diagnosis of GAD or social phobia. We present the case of a client with social phobia who received six sessions of group therapy and who carried the ambulatory computer throughout this treatment. Outcome data suggest that the treatment was highly effective for this client as well as others with a diagnosis of social phobia or GAD.     

A component analysis of cognitive-behavioral therapy for generalized anxiety disorder and the role of interpersonal problems

Clients with generalized anxiety disorder (GAD) received either (a) applied relaxation and self-control desensitization, (b) cognitive therapy, or (c) a combination of these methods. Treatment resulted in significant improvement in anxiety and depression that was maintained for 2 years. The large majority no longer met diagnostic criteria; a minority sought further treatment during follow-up. No differences in outcome were found between conditions; review of the GAD therapy literature suggested that this may have been due to strong effects generated by each component condition. Finally, interpersonal difficulties remaining at posttherapy, measured by the Inventory of Interpersonal Problems Circumplex Scales (L. E. Alden, J. S. Wiggins, & A. L. Pincus, 1990) in a subset of clients, were negatively associated with posttherapy and follow-up improvement, suggesting the possible utility of adding interpersonal treatment to cognitive-behavioral therapy to increase therapeutic effectiveness.     

Predicting response to cognitive-behavioral therapy in a sample of HIV-positive patients with chronic pain

Introduction  The primary aim of this study was to examine the role of patient characteristics in predicting response to treatment in a sample of HIV-positive patients receiving 12 weekly sessions of a CBT-based pain management protocol. Method  A pre/post test single group design was used. Pain-related functioning was assessed at baseline and 12 weeks post-treatment using the Pain Outcomes Questionnaire-VA. Data analysis and Results   Multivariate regression analysis showed that higher baseline levels of pain-related anxiety were related to greater improvement in pain-related functioning at post-treatment, and non-Caucasian participants reported a greater response to treatment when compared to Caucasian participants. Attendance to CBT treatment sessions focused on progressive muscle relaxation and cognitive reconceptualization of pain were also related to treatment outcome. Conclusion  Non-Caucasian patients reporting higher levels of pain-related anxiety may respond particularly well to treatment. Treatment sessions focused on progressive muscle relaxation and cognitive reconceptualization of pain may be particularly helpful.     

Effects of Brief Relaxation Training on Children;s Motor Functioning

Relaxation training is frequently prescribed in the treatment of anxiety, particularly for children with medical disorders. Unfortunately, very little is known about how different relaxation procedures work with children. To test whether different procedures had different effects, we compared test-anxious children given (a) progressive muscle relaxation training, (b) visual imagery training, or (c) nonspecific instructions to relax on several physiologic, self-report, and performance measures. We found no differences among the groups on the physiological or self-report measures. However, the progressive muscle relaxation and visual imagery groups improved in fine-motor performance following training, whereas the nonspecific instructions group worsened in performance. We discuss issues of arousal intensity and generalization of skills.     

Internet-Based Psychodynamic versus Cognitive Behavioral Guided Self-Help for Generalized Anxiety Disorder: A Randomized Controlled Trial

Background: Guided Internet-based cognitive behavior therapy (ICBT) has been tested in many trials and found to be effective in the treatment of anxiety and mood disorders. Generalized anxiety disorder (GAD) has also been treated with ICBT, but there are no controlled trials on guided Internet-based psychodynamic treatment (IPDT). Since there is preliminary support for psychodynamic treatment for GAD, we decided to test if a psychodynamically informed self-help treatment could be delivered via the Internet. The aim of the study was to investigate the efficacy of IPDT for GAD and to compare against ICBT and a waiting list control group. Method: A randomized controlled superiority trial with individuals diagnosed with GAD comparing guided ICBT (n = 27) and IPDT (n = 27) against a no treatment waiting list control group (n = 27). The primary outcome measure was the Penn State Worry Questionnaire. Results: While there were no significant between-group differences immediately after treatment on the main outcome measure, both IPDT and ICBT resulted in improvements with moderate to large within-group effect sizes at 3 and 18 months follow-up on the primary measure in the completer analyses. The differences against the control group, although smaller, were still significant for both PDT and CBT when conforming to the criteria of clinically significant improvement. The active treatments did not differ significantly. There was a significant group by time interaction regarding GAD symptoms, but not immediately after treatment. Conclusions: IPDT and ICBT both led to modest symptom reduction in GAD, and more research is needed.     

Family history of psychological problems in generalized anxiety disorder

The current investigation examined self-reported family history of psychological problems in a large sample of individuals diagnosed with generalized anxiety disorder (GAD) and nonanxious controls. The GAD participants were all individuals receiving cognitive-behavioral therapy as part of two large randomized clinical trials. Family history information was obtained from the Anxiety Disorders Interview Schedule-Revised (ADIS-R; DiNardo & Barlow, 1988). The results indicate that, compared to control participants, individuals with GAD were more likely to have family members with anxiety problems, but not other psychological problems. Possible mechanisms for the familial transmission of GAD are discussed.     

Psychological treatment of generalized anxiety disorder: A meta-analysis

Recent years have seen a near-doubling of the number of studies examining the effects of psychotherapies for generalized anxiety disorder (GAD) in adults. The present article integrates this new evidence with the older literature through a quantitative meta-analysis. A total of 41 studies (with 2132 patients meeting diagnostic criteria for GAD) were identified through systematic searches in bibliographical databases, and were included in the meta-analysis. Most studies examined the effects of cognitive behavior therapy (CBT). The majority of studies used waiting lists as control condition. The pooled effect of the 38 comparisons (from 28 studies) of psychotherapy versus a control group was large (g = 0.84; 95% CI: 0.71–0.97) with low to moderate heterogeneity. The effects based on self-report measures were somewhat lower than those based on clinician-rated instruments. The effects on depression were also large (g = 0.71; 95% CI: 0.59–0.82). There were some indications for publication bias. The number of studies comparing CBT with other psychotherapies (e.g., applied relaxation) or pharmacotherapy was too small to draw conclusions about comparative effectiveness or the long-term effects. There were some indications that CBT was also effective at follow-up and that CBT was more effective than applied relaxation in the longer term.     

Treatment of generalised anxiety disorder with a short course of psychological therapy,combined with buspirone or placebo

BACKGROUND: Very few studies have examined the combination of drug and psychological treatment in generalised anxiety disorder (GAD). Theoretically, buspirone should be a useful drug to combine with a learning-based therapy. METHODS: Sixty patients with GAD were randomly assigned to treatment with buspirone or placebo, combined with anxiety management training or non-directive therapy for a period of 8 weeks. RESULTS: Forty-four patients with a mean Hamilton Anxiety Scale score of 28 completed treatment. There were no significant differences between treatment groups. All groups showed significant improvement after 8 weeks compared to baseline. There were no baseline differences between those who completed the trial and those who did not but patients given buspirone were more likely to drop out. CONCLUSIONS: A short course of psychological therapy, whether or not accompanied by active medication, was an effective treatment for patients diagnosed as having quite severe symptoms of GAD. CLINICAL IMPLICATIONS AND LIMITATIONS: Dropouts led to a sample size which may have been too small to detect group differences. Cognitive therapy may have been more effective.     

国内认知行为疗法联合药物治疗广泛性焦虑疗效的元分析

目的:分析认知行为疗法(CBT)联合药物治疗与单纯使用药物治疗对广泛性焦虑干预的疗效。方法:对CBT和药物联合治疗与单纯使用药物治疗广泛性焦虑的对照研究进行回顾研究,使用Revman 5.3进行系统评价。结果:共获得7篇文献符合本文的元分析选择标准,被试人数共435人。7组数据比较了CBT和药物联合治疗与单独使用药物治疗广泛性焦虑的治愈率、显效率和有效率,结果显示,联合治疗组的治愈率(OR=2.69,Z=4.33,P0.05)、显效率(OR=2.07,Z=3.58,P0.05)与有效率(OR=3.11,Z=3.50,P0.05)均优于单纯药物组。结论:在国内治疗广泛性焦虑中,认知行为疗法联合药物治疗8周后比单独使用药物治疗效果更好。     

Heart rate and autonomic response to stress after experimental induction of worry versus relaxation in healthy,high-worry,and generalized anxiety disorder individuals

Generalized anxiety disorder (GAD) is the most commonly occurring anxiety disorder and has been related to cardiovascular morbidity such as cardiac ischemia, sudden cardiac death, and myocardial infarction. Both GAD and its cardinal symptom – worry – have been shown to promote muted physiological reactivity in response to laboratory and ecological stressors. Importantly, no study to date has examined the concurrent and relative contributions of trait and state worry within healthy controls, (non-clinical) high trait-worry controls, and GAD participants. The present study examined heart rate (HR), respiratory sinus arrhythmia (RSA), and salivary alpha-amylase (sAA) responses to laboratory stress during and following the experimental induction of worry versus relaxation in healthy controls (n = 42), high trait worriers (n = 33) and participants with GAD (n = 76). All groups exhibited increased HR and decreased RSA in response to the stressor, with no differences by condition. Baseline sAA significantly moderated HR and RSA reactivity, such that higher sAA predicted greater increases in HR and decreases in RSA. There was a significant group by baseline sAA interaction such that in GAD, higher baseline sAA predicted decreased change in sAA during stress, whereas higher baseline sAA predicted greater sAA change in healthy controls. High-worry controls fell non-significantly between these groups. The present study provides additional evidence for the effect of worry on diminished HR stress response and points to possible suppression of adrenergic sympathetic stress responses in GAD.     

Relaxation therapy as an adjunct in radiation oncology.

Stress, anxiety, and depression in patients who are undergoing treatment of cancer significantly compromise the quality of their lives. The impact of stress reduction by relaxation training and imagery was studied in 82 out-patients who were undergoing curative (73 patients) or palliative (9 patients) radiotherapy. Fifty-two females and 30 males were assigned randomly to a relaxation training condition (34 patients) as an adjunct to radiation or a control condition (29 patients), which entailed education and counseling along with the RT. Using pre- and posttests of the Profile of Mood States, significant (p less than .01) reductions were noted in the treatment group in tension, depression, anger, and fatigue. The results suggest that relaxation training substantially improves several psychological parameters associated with quality of life in ambulatory patients who are undergoing radiation therapy.     

Efficacy of a cognitive-behavioral treatment for generalized anxiety disorder: evaluation in a controlled clinical trial

Recent advances in the understanding of worry have led to the development of treatments for generalized anxiety disorder (GAD). The present study tested a GAD treatment that targeted intolerance of uncertainty, erroneous beliefs about worry, poor problem orientation, and cognitive avoidance. Twenty-six primary GAD patients were randomly allocated to a treatment condition (n = 14) or a delayed treatment control condition (n = 12). Self-report, clinician, and significant other ratings assessed GAD and associated symptoms. The results show that the treatment led to statistically and clinically significant change at posttest and that gains were maintained at 6- and 12-month follow-ups. Furthermore, 20 of 26 participants (77%) no longer met GAD diagnostic criteria following treatment. With regard to the treatment's underlying model, the results show that intolerance of uncertainty significantly decreased over treatment and that gains were maintained at both follow-ups. Although nonspecific factors were not significant predictors of treatment outcome, their role in the treatment of GAD requires further investigation.     

The effects of biofeedback-assisted relaxation on cell-mediated immunity,cortisol, and white blood cell count in healthy adult subjects

The effect of biofeedback-assisted relaxation on cell-mediated immunity, cortisol, and white blood cell count was investigated in healthy adults under low-stress conditions. Fourteen subjects were trained with biofeedback-assisted relaxation for 4 weeks, while 17 subjects were controls. The group trained in relaxation techniques showed increased blastogenesis, decreased white blood cell count, due to decreased neutrophils, and no change in cortisol in comparison to the control group. Subjects with lower initial anxiety scores and forehead muscle tension levels showed larger increases in blastogenesis and larger decreases in neutrophils than subjects with higher initial anxiety and muscle tension levels.