A randomized controlled trial of guided internet-delivered cognitive behaviour therapy for older adults with generalized anxiety

This study aimed to establish the efficacy of guided Internet-delivered cognitive-behaviour therapy (ICBT) for older adults with generalized anxiety disorder (GAD) or subclinical GAD. Participants were randomized to receive seven modules of ICBT (n = 24) or to a waiting list condition (WLC; n = 22). Faster improvements in symptoms of anxiety and depression were observed for participants in the ICBT condition relative to the WLC, with large between-group effect sizes on the Generalized anxiety disorder-7 (d = .85) and the Patient health questionnaire (d = 1.17) obtained at post-treatment. Further reduction in generalized anxiety symptoms was reported over the one-month follow-up. Treatment effects were replicated when control participants subsequently underwent treatment. Higher ratings of treatment credibility, but not expectancy, prior to ICBT predicted improvements over time. The results support the efficacy of ICBT as treatment for older adults with GAD.     

Using the GAD-Q-IV to identify generalized anxiety disorder in psychiatric treatment seeking and primary care medical samples

The fourth edition of the Generalized Anxiety Disorder Questionnaire (GAD-Q-IV) is a self-report measure that is commonly used to screen for the presence of generalized anxiety disorder (GAD). The current investigation attempted to identify an optimal cut score using samples obtained from an outpatient psychiatric (n = 163) and primary care clinic (n = 99). Results indicated that a cut score of 7.67 provided an optimal balance of sensitivity (.85) and specificity (.74) comparable to a previously identified cut score (5.7) across both samples (sensitivity = .90, specificity = .66). However, both cut scores were consistently outperformed by a score representing the criteria for GAD described in the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (sensitivity = .89, specificity = .82).     

The anxious heart in whose mind? A systematic review and meta-regression of factors associated with anxiety disorder diagnosis,treatment and morbidity risk in coronary heart disease

ObjectiveTo (1) report the prognostic association between anxiety disorder subtypes and major adverse cardiac events (MACE), (2) report anxiety disorder prevalence in coronary heart disease (CHD), and (3) report the efficacy of anxiety disorder treatments in CHD.MethodsA comprehensive electronic database search was performed in November 2013 for studies reporting anxiety disorder prevalence according to structured interview in CHD samples or MACE, and randomized controlled trials (RCTs) comparing anxiety disorder treatment with placebo or usual care. From 4041 articles 42 samples were selected for extraction (8 for MACE prognosis, 39 for prevalence, no RCTs were eligible).ResultsFive generalized anxiety disorder (GAD) studies reported 883 MACE events (combined n = 2851). There was a non-significant association between GAD and MACE (risk ratio = 1.20, 95% CI .86–1.68, P = .28) however the effect size was highly significant in outpatient samples (adjusted hazard ratio = 1.94, 95% CI 1.45–2.60, P < .001). No other anxiety disorder subtype was associated with MACE. Prevalence data showed high comorbidity with depression (49.06%; 95% CI 34.28–64.01) and substantial heterogeneity between studies. Panic disorder prevalence was higher in psychiatrist/psychologist raters (9.92% vs. 4.74%) as was GAD (18.45% vs. 13.01%). Panic and GAD estimates were also heterogeneous according to DSM-III-R versus DSM-IV taxonomies.ConclusionsThe paucity of extant anxiety disorder RCTs, alongside MACE risk for GAD outpatients, should stimulate further anxiety disorder intervention in CHD populations. Research should focus on depression and anxiety, thereby unraveling disorder specific and more generic pathways.     

A taxometric investigation of agoraphobia in a clinical and a community sample

The nosological status of agoraphobia is controversial. Agoraphobia may be a distinct diagnostic entity or a marker of avoidance severity. The current study examines the latent structure of agoraphobia through the use of taxometric analysis. The latent structure of agoraphobia was examined in two independent samples, one comprising outpatients presenting for treatment for panic disorder (PD) with or without agoraphobia (n = 365), and the other comprising community volunteers to a national mental health survey who experienced fear or avoidance of at least one prototypic agoraphobic situation (n = 640). Two taxometric procedures were carried out – maximum eigenvalue (MAXEIG) and mean above minus below a cut (MAMBAC) – using indicators derived from questionnaire measures of, and structured diagnostic interviews for, agoraphobia. Results show consistent evidence of dimensional latent structure in both samples. It is concluded that scores on measures of agoraphobia best represent an agoraphobic severity dimension.     

Intolerance of uncertainty as a mediator of reductions in worry in a cognitive behavioral treatment program for generalized anxiety disorder

Growing evidence suggests that intolerance of uncertainty (IU) is a cognitive vulnerability that is a central feature across diverse anxiety disorders, including generalized anxiety disorder (GAD). Although cognitive behavioral therapy (CBT) has been shown to reduce IU, it remains to be established whether or not reductions in IU mediate reductions in worry. This study examined the process of change in IU and worry in a sample of 28 individuals with GAD who completed CBT. Changes in IU and worry, assessed bi-weekly during treatment, were analyzed using multilevel mediation models. Results revealed that change in IU mediated change in worry (ab = −0.20; 95% CI [−.35, −.09]), but change in worry did not mediate change in IU (ab = −0.16; 95% CI [−.06, .12]). Findings indicated that reductions in IU accounted for 59% of the reductions in worry observed over the course of treatment, suggesting that changes in IU are not simply concomitants of changes in worry. Findings support the idea that IU is a critical construct underlying GAD.     

Testing a procedural variant of written imaginal exposure for generalized anxiety disorder

This experiment examined the degree to which it is more beneficial for individuals with generalized anxiety disorder (GAD) to engage in repeated exposure to mental imagery of the same feared scenario versus varying the exposure content. On three consecutive days, individuals with GAD (N = 57) spent 20 min writing about: (1) the same worst case scenario (consistent exposure; CE), (2) variations of their worst case scenario (varied exposure; VE), or (3) a neutral topic (neutral control; NC). Participants in the CE condition displayed significant decreases in worry, acute cognitive avoidance, and intolerance of uncertainty from baseline to 1-week follow-up; participants in the VE and NC conditions did not. Initial activation of self-reported anxiety (observed in the CE and VE conditions) and between-session reduction in anxiety (observed in the CE condition only) were associated with improvement in worry. Including more references to negative emotion and writing in the present tense were also associated with greater improvement in worry in the CE condition. These findings suggest that writing repeatedly about the same worst case scenario may benefit people with GAD. The study also provides information on potential mechanisms of change.     

Characteristics of responders and non-responders to risperidone monotherapy or placebo in co-occurring bipolar disorder and anxiety disorder

Clinical characteristics predicting response and remission to psychopharmacological treatment of bipolar disorder (BD) and co-occurring anxiety disorders have been understudied. We hypothesized that non-response to risperidone or placebo in individuals with co-occurring BD and anxiety symptoms would be associated with a more severe clinical course of BD, and certain demographic variables. This study was a secondary analysis of a randomized, double-blind, parallel, 8-week study comparing risperidone monotherapy and placebo in individuals with BD plus current panic disorder, current generalized anxiety disorder (GAD), or lifetime panic disorder (n = 111) [31]. We compared clinical characteristics of responders (50% improvement on the Hamilton Anxiety Scale [HAM-A]) and non-responders as well as remitters (HAM-A < 7) and non-remitters in risperidone treatment (n = 54) and placebo (n = 57) groups. For non-responders in the risperidone group, co-occurring lifetime panic disorder was significantly more common than for non-responders in the placebo group. Apart from this, no significant differences in course of illness or demographics were found either between or across groups for patients with BD and co-occurring anxiety symptoms receiving risperidone or placebo in this acute phase study.     

A hierarchical model for the relationships between general and specific vulnerability factors and symptom levels of generalized anxiety disorder

The present study examined a hierarchical model for the relationships between general and specific vulnerability factors and symptom manifestations of generalized anxiety disorder (GAD). A clinical sample of patients with GAD (N = 137) completed a set of self-report questionnaires for measuring neuroticism, extraversion, intolerance of uncertainty, metacognitive beliefs, and symptoms of generalized anxiety (i.e., worry) and depression. A bootstrapping analysis yielded support for a model in which the relation between the general vulnerability factor of neuroticism and symptoms of GAD were mediated by the specific vulnerability factors of intolerance of uncertainty and negative metacognitions. Implications for the classification and treatment of GAD are discussed.     

Intolerance of uncertainty and negative metacognitive beliefs as transdiagnostic mediators of repetitive negative thinking in a clinical sample with anxiety disorders

This study aimed to replicate and extend a hierarchical model of vulnerability to worry, with neuroticism and extraversion as higher-order factors and negative metacognitions and intolerance of uncertainty as second-order factors. The model also included a transdiagnostic measure of repetitive negative thinking (RNT) and depression symptoms as outcome variables to determine whether relationships would extend beyond worry, which has traditionally been studied within the context of generalized anxiety disorder (GAD). Participants (N = 99) were referrals to a specialist anxiety disorders clinic with a principal anxiety disorder who completed a battery of self-report questionnaires assessing neuroticism, extraversion, metacognitions, intolerance of uncertainty, worry, RNT, and depression symptoms. Mediational analyses using bootstrapping provided support for transdiagnostic and diagnosis-specific mediation effects. Negative metacognitions fully mediated the relationship between neuroticism and RNT for the whole sample and for subsamples with and without GAD. Intolerance of uncertainty mediated the relationship between neuroticism and worry (for the whole sample and for those with GAD) and between neuroticism and RNT (for those with GAD). Implications for theory, treatment, and nosology are discussed.     

Association between generalized anxiety levels and pain in a community sample: Evidence for diagnostic specificity

BackgroundIt is unclear whether generalized anxiety disorder (GAD) has a specific relationship to pain syndromes, going beyond the established association of pain with anxiety syndromes in general.MethodsMental disorders were assessed in a community sample (N = 4181; 18–65 years) using the DSM-IV/M-CIDI. Several threshold definitions were used to define GAD and medically unexplained pain.ResultsThe association between pain and GAD (odds ratio, OR = 5.8 pain symptoms; OR = 16.0 pain disorder) is stronger than the association between pain and other anxiety disorders (OR = 2.4 pain symptoms; OR = 4.0 pain disorder). This association extends to subthreshold level definitions of GAD with some indication for a non-linear dose–response relationship. The GAD-pain link cannot sufficiently be explained by demographic factors, comorbid mental or physical disorders.ConclusionsThe association of pain and generalized anxiety is not artifactual. Compared to other anxiety syndromes, it appears to be stronger and more specific suggesting the need to explore clinical and public health implications.     

Cognitive behavioral therapy for youth with social anxiety: Differential short and long-term treatment outcomes

This study examined social anxiety symptoms and/or diagnosis as a predictor of differential short- and long-term cognitive-behavioral treatment (CBT) outcomes. Ninety-one anxiety-disordered youth participated in a randomized clinical trial of CBT. Semi-structured interviews provided dimensional clinical severity ratings (CSRs) for children's principal anxiety disorder at pretreatment, posttreatment, 1-year and 7.4-year follow-up assessments for youth with versus without pretreatment social anxiety. Thirty-nine youth presented with either principal (n = 17), secondary (n = 11), or tertiary social phobia diagnoses (n = 7) or subclinical social anxiety symptoms (n = 4). Hierarchal linear modeling (HLM) indicated that youth made similar gains from pretreatment to posttreatment and 1-year follow-up regardless of their social anxiety symptoms or diagnosis; however, youth with social anxiety symptoms or diagnosis were significantly less improved at 7.4-year follow-up. This pattern was distinct from that of youth with the most severe (CSR = 4) principal anxiety disorders at pretreatment. Though initially responsive to CBT, children who present with social anxiety diagnoses or symptoms may require an enhanced or extended treatment to maintain their gains into young adulthood whether or not social anxiety is considered their principal childhood difficulty.     

Psychometric evaluation of the Concerns of Social Reprisal Scale: Further explicating the roots of fear of positive evaluation

Fear of positive evaluation (FPE) has been proposed to be an important feature of social anxiety disorder (SAD) and to be rooted, at least partly, in concerns of social reprisal due to positive impressions. In order to formally test this hypothesis, the Concerns of Social Reprisal Scale (CSRS) was developed. The purpose of the present series of studies was to examine the psychometric profile of the CSRS across several independent samples including: a large (n = 981) undergraduate sample; a clinical sample of individuals diagnosed with social anxiety disorder (n = 27), and a demographically-matched subsample of healthy control participants (n = 24). The factorial validity, internal consistency, and construct validity of the CSRS were examined. Results across both studies provided support for the psychometric profile of the CSRS. The implications of concerns of social reprisal for the assessment of social anxiety symptoms, theoretical models of fear of evaluation and SAD, and their potential clinical utility with regard to treating SAD are discussed.     

Improvements in emotion regulation following repetitive transcranial magnetic stimulation for generalized anxiety disorder

Generalized anxiety disorder (GAD) is characterized by emotion regulation difficulties, which are associated with abnormalities in neural circuits encompassing fronto-limbic regions including the dorsolateral prefrontal cortex (DLPFC). The aim of this study was to determine whether DLPFC neuromodulation improves emotion regulation in patients with GAD. This is a secondary analysis from a randomized-controlled trial comparing 30 sessions of low-frequency right-sided active (n = 13) versus sham (n = 12, sham coil) repetitive transcranial magnetic stimulation (rTMS) at the right DLPFC in patients with GAD. Results indicated statistically significant improvements in self-reported emotion regulation difficulties at posttreatment and 3-month follow-up in the active group only. Improvements were found primarily in the domains of goal-directed behaviors and impulse control and were significantly associated with a global clinician rating of improvement. These preliminary results support rTMS as a treatment for GAD and suggest improved emotion regulation as a possible mechanism of change.     

Cortical surface anatomy in pediatric patients with generalized anxiety disorder

BackgroundIt is established that pediatric patients with generalized anxiety disorder (GAD) exhibit functional abnormalities and altered gray matter volumes in neural structures that subserve emotional processing, yet there are no data regarding the surface anatomy of the cerebral cortex in youth with GAD.MethodsUsing an automated surface-based approach (FreeSurfer), cortical thickness was assessed node-by-node over the entire cerebral cortex in adolescents with GAD and no co-occurring major depressive disorder (n = 13) and healthy subjects (n = 19).ResultsCompared with healthy adolescents, youth with GAD exhibited increased cortical thickness in the right inferolateral and ventromedial prefrontal cortex (i.e., inferior frontal gyrus), the left inferior and middle temporal cortex as well as the right lateral occipital cortex. No relationships were observed between cortical thickness and the severity of anxiety symptoms in the significant regions that were identified in the vertex-wise analysis.ConclusionsThese findings suggest that, in adolescents with GAD, abnormalities in cortical thickness are present in an ensemble of regions responsible for fear learning, fear extinction, reflective functioning (e.g., mentalization), and regulation of the amygdala.     

Pain-related anxiety and anxiety sensitivity across anxiety and depressive disorders

Fear–anxiety–avoidance models posit pain-related anxiety and anxiety sensitivity as important contributing variables in the development and maintenance of chronic musculoskeletal pain [Asmundson, G. J. G, Vlaeyen, J. W. S., & Crombez, G. (Eds.). (2004). Understanding and treating fear of pain. New York: Oxford University Press]. Emerging evidence also suggests that pain-related anxiety may be a diathesis for many other emotional disorders [Asmundson, G. J. G., & Carleton, R. N. (2005). Fear of pain is elevated in adults with co-occurring trauma-related stress and social anxiety symptoms. Cognitive Behaviour Therapy, 34, 248–255; Asmundson, G. J. G., & Carleton, R. N. (2008). Fear of pain. In: M. M. Antony & M. B. Stein (Eds.), Handbook of anxiety and the anxiety disorders (pp. 551–561). New York: Oxford University Press] and appears to share several elements in common with other fears (e.g., anxiety sensitivity, illness/injury sensitivity, fear of negative evaluation) as described by Reiss [Reiss, S. (1991). Expectancy model of fear, anxiety, and panic. Clinical Psychology Review, 11, 141–153] and Taylor [Taylor, S. (1993). The structure of fundamental fears. Journal of Behavior Therapy and Experimental Psychiatry, 24, 289–299]. The purpose of the present investigation was to assess self-reported levels of pain-related anxiety [Pain Anxiety Symptoms Scale-Short Form; PASS-20; McCracken, L. M., & Dhingra, L. (2002). A short version of the Pain Anxiety Symptoms Scale (PASS-20): preliminary development and validity. Pain Research and Management, 7, 45–50] across several anxiety and depressive disorders and to compare those levels to non-clinical and chronic pain samples. Participants consisted of a clinical sample (n = 418; 63% women) with principal diagnoses of a depressive disorder (DD; n = 22), panic disorder (PD; n = 114), social anxiety disorder (SAD; n = 136), obsessive-compulsive disorder (OCD; n = 86), generalized anxiety disorder (GAD; n = 46), or specific phobia (n = 14). Secondary group comparisons were made with a community sample as well as with published data from a treatment-seeking chronic pain sample [McCracken, L. M., & Dhingra, L. (2002). A short version of the Pain Anxiety Symptoms Scale (PASS-20): preliminary development and validity. Pain Research and Management, 7, 45–50]. Results suggest that pain-related anxiety is generally comparable across anxiety and depressive disorders; however, pain-related anxiety was typically higher (p < .01) in individuals with anxiety and depressive disorders relative to a community sample, but comparable to or lower than a chronic pain sample. Results imply that pain-related anxiety may indeed be a construct independent of other fundamental fears, warranting subsequent hierarchical investigations and consideration for inclusion in treatments of anxiety disorders. Additional implications and directions for future research are discussed.     

The Disqualification of Positive Social Outcomes Scale: A novel assessment of a long-recognized cognitive tendency in social anxiety disorder

Socially anxious individuals frequently tend to disqualify positive social experiences and outcomes. However, no formal measure of Disqualificationof Positive Social Outcome (DPSO)-related tendencies has yet been reported. The purpose of the present series of studies was to develop the Disqualification ofPositive Social Outcomes Scale (DPSOS) and examine its psychometric profile across several independent samples, including a large (n = 585) undergraduate sample; a clinical sample of individuals diagnosed with social anxiety disorder (n = 14), and a demographically-equivalent sample of non-socially anxious control participants (n = 14). The factorial validity, internal consistency, and construct validity of the DPSOS subscales were examined. Results provide preliminary support for the psychometric properties of the DPSOS. Implications of DPSO as to assessment and treatment of social anxiety disorder are discussed.     

Does the measure matter? On the association between disgust proneness and OCD symptoms

Although some studies suggest that the association between disgust proneness (DP) and obsessive–compulsive symptoms (OCS) is specific to the contamination subtype, others suggest that DP is associated with OCS more broadly. To examine if the discrepant findings may partially reflect differences in self-report measures used, this investigation employed structural equation modeling to examine the association between DP and OCS in three samples that completed different combinations of measures of DP, OCS, and anxiety/negative affect. In Study 1 (n = 626), the path from DP to contamination-based OCS was significantly stronger than the path from DP to non-contamination OCS when controlling for anxiety sensitivity. In Study 2 (n = 403), the results showed that the path from DP to contamination-based OCS did not significantly differ from the path from DP to non-contamination OCS when controlling for negative affect. Lastly, Study 3 (n = 296) showed that the path from DP to contamination-based OCS was significantly weaker than the path from DP to non-contamination OCS. These findings highlight that the self-report measures employed is an important moderator when making inferences about the association between DP and contamination-based OCS and non-contamination OCS.     

Mild to severe social fears: Ranking types of feared social situations using item response theory

Social anxiety disorder is one of the most common mental disorders, and is associated with long term impairment, distress and vulnerability to secondary disorders. Certain types of social fears are more common than others, with public speaking fears typically the most prevalent in epidemiological surveys. The distinction between performance- and interaction-based fears has been the focus of long-standing debate in the literature, with evidence performance-based fears may reflect more mild presentations of social anxiety. This study aims to explicitly test whether different types of social fears differ in underlying social anxiety severity using item response theory techniques. Different types of social fears were assessed using items from three different structured diagnostic interviews in four different epidemiological surveys in the United States (n = 2261, n = 5411) and Australia (n = 1845, n = 1497); and ranked using 2-parameter logistic item response theory models. Overall, patterns of underlying severity indicated by different fears were consistent across the four samples with items functioning across a range of social anxiety. Public performance fears and speaking at meetings/classes indicated the lowest levels of social anxiety, with increasing severity indicated by situations such as being assertive or attending parties. Fears of using public bathrooms or eating, drinking or writing in public reflected the highest levels of social anxiety. Understanding differences in the underlying severity of different types of social fears has important implications for the underlying structure of social anxiety, and may also enhance the delivery of social anxiety treatment at a population level.