Evidence Base Update for Psychosocial Treatments for Children and Adolescents Exposed to Traumatic Events

Child and adolescent trauma exposure is prevalent, with trauma exposure-related symptoms, including posttraumatic stress, depressive, and anxiety symptoms often causing substantial impairment. This article updates the evidence base on psychosocial treatments for child and adolescent trauma exposure completed for this journal by Silverman et al. (2008). For this review, we focus on 37 studies conducted during the seven years since the last review. Treatments are grouped by overall treatment family (e.g., cognitive behavioral therapy), treatment modality (e.g., individual vs. group), and treatment participants (e.g., child only vs. child and parent). All studies were evaluated for methodological rigor according to Journal of Clinical Child & Adolescent Psychology evidence-based treatment evaluation criteria (Southam-Gerow & Prinstein, 2014), with cumulative designations for level of support for each treatment family. Individual CBT with parent involvement, individual CBT, and group CBT were deemed well-established; group CBT with parent involvement and eye movement desensitization and reprocessing (EMDR) were deemed probably efficacious; individual integrated therapy for complex trauma and group mind–body skills were deemed possibly efficacious; individual client-centered play therapy, individual mind–body skills, and individual psychoanalysis were deemed experimental; and group creative expressive + CBT was deemed questionable efficacy. Advances in the evidence base, with comparisons to the state of the science at the time of the Silverman et al. (2008) review, are discussed. Finally, we present dissemination and implementation challenges and areas for future research.     

Evidence Base Update of Psychosocial Treatments for Child and Adolescent Depression

Depression in youth is prevalent and disabling and tends to presage a chronic and recurrent course of illness and impairment in adulthood. Clinical trial research in youth depression has a 30-year history, and evidence-based treatment reviews appeared in 1998 and 2008. The current review of 42 randomized controlled trials (RCTs) updates these reviews to include RCTs published between 2008 and 2014 (N = 14) and reevaluates previously reviewed literature. Given the growing maturity of the field, this review utilized a stringent set of methodological criteria for trial inclusion, most notable for excluding trials based in subclinical samples of youth that had been included in previous reviews (N = 12) and including well-designed RCTs with null and negative findings (N = 8). Findings from the current review suggest that evidence for child treatments is notably weaker than for adolescent interventions, with no child treatments achieving well-established status and the evidentiary basis of treatments downgraded from previous reports. Cognitive behavioral therapy (CBT) for clinically depressed children appears to be possibly efficacious, with mixed findings across trials. For depressed adolescents, both CBT and interpersonal psychotherapy are well-established interventions, with evidence of efficacy in multiple trials by independent investigative teams. This positive conclusion is tempered by the small size of the interpersonal psychotherapy literature (N = 6) and concern that CBT effects may be attenuated in clinically complicated samples and when compared against active control conditions. Data on predictors, moderators, and mediators are examined and priorities for future research discussed.     

Monotherapy Insufficient in Severe Anxiety? Predictors and Moderators in the Child/Adolescent Anxiety Multimodal Study

This secondary analysis of the Child/Adolescent Anxiety Multimodal Study (CAMS) used baseline patient characteristics to identify prognostic subgroups of children based on likelihood of remission. We also investigated predictors and moderators of outcome. CAMS randomized 488 youths with generalized, social, and separation anxiety disorders to cognitive behavioral therapy (CBT), sertraline, both, or pill placebo. Outcomes were Week 12 child, parent, and independent evaluator (IE) ratings of child anxiety. We used receiver operating characteristics analysis and stepwise regression to identify predictors and moderators of outcome. Severe anxiety, lower socioeconomic status, and comorbid obsessive-compulsive disorder predicted higher IE-rated anxiety posttreatment; child-rated social anxiety predicted poorer outcomes reported by all informants. Regarding moderators, Hispanic ethnicity predicted higher IE-rated anxiety after CBT and higher parent-rated anxiety after sertraline. In youths with severe anxiety (Pediatric Anxiety Rating Scale ≥ 20, <italic>n</italic> = 220), combination treatment increased remission (relative risk [RR] = 2.85, <italic>p</italic> < .001), 95% confidence interval (CI) [1.51, 5.39], whereas CBT (RR = 1.55, <italic>p</italic> = .20), 95% CI [0.77, 3.10], and sertraline (RR = 1.27, <italic>p</italic> = .53), 95% CI [0.59, 2.73], did not significantly increase remission relative to placebo. These are the first findings demonstrating that a combination of CBT and a selective serotonin reuptake inhibitor, not monotherapy, is likely key for achieving remission in severe anxiety. CAMS was not powered to detect treatment efficacy after stratification by anxiety severity, so further research is needed regarding effective treatments in severe anxiety. Our main effect findings suggest youth with severe anxiety (especially social phobia), low socioeconomic status and obsessive-compulsive disorder benefit less from current first-line treatments relative to other anxious youth. ClinicalTrials.gov: NCT00052078.     

Child and Adolescent Adherence With Cognitive Behavioral Therapy for Anxiety: Predictors and Associations With Outcomes

Cognitive behavioral therapy (CBT) for anxiety disorders is effective, but nonadherence with treatment may reduce the benefits of CBT. This study examined (a) four baseline domains (i.e., demographic, youth clinical characteristics, therapy related, family/parent factors) as predictors of youth adherence with treatment and (b) the associations between youth adherence and treatment outcomes. Data were from 279 youth (7–17 years of age, 51.6% female; 79.6% White, 9% African American), with Diagnostic and Statistical Manual of Mental Disorders (4th ed., text rev.) diagnoses of separation anxiety disorder, generalized anxiety disorder, and/or social phobia, who participated in CBT in the Child/Adolescent Anxiety Multimodal Study. Adherence was defined in three ways (session attendance, therapist-rated compliance, and homework completion). Multiple regressions revealed several significant predictors of youth adherence with CBT, but predictors varied according to the definition of adherence. The most robust predictors of greater adherence were living with both parents and fewer youth comorbid externalizing disorders. With respect to outcomes, therapist ratings of higher youth compliance with CBT predicted several indices of favorable outcome: lower anxiety severity, higher global functioning, and treatment responder status after 12 weeks of CBT. Number of sessions attended and homework completion did not predict treatment outcomes. Findings provide information about risks for youth nonadherence, which can inform treatment and highlight the importance of youth compliance with participating in therapy activities, rather than just attending sessions or completing homework assignments.     

Empirically supported treatments for panic disorder: costs, benefits, and stepped care

Treatment outcome findings suggest that cognitive-behavioral therapy (CBT) and pharmacotherapy offer similar short-term treatment gains for panic disorder and that CBT may afford more optimal maintenance of treatment gains without the need for ongoing treatment. However, efficacy is not the only consideration for patients, and because of limited health care resources, evaluation of the cost-benefit ratio of these treatments is important. In this article, the authors review estimates of the relative efficacy, acceptability, tolerability, and costs of these treatments; empirically examine the costs and outcome of cognitive-behavioral and pharmacologic interventions as they are delivered in an outpatient clinic specializing in these treatments; and comment on how these data inform a stepped care model of treatment. Analysis of the "services" data indicated that CBT was at least equal to pharmacotherapy in terms of pretreatment severity and acute treatment outcome and that CBT is an especially cost-effective treatment option.     

Components Analyses of a School-Based Cognitive Behavioral Treatment for Youth Depression

The current study sought to build upon research on cognitive behavioral therapy (CBT) as the first-line treatment for depressed youth by investigating the effects of the various components of a CBT treatment on changes in depressive symptoms in young female participants. Female participants 9–14 years of age (n = 40; M age = 10.58 years) with a diagnosis of a depressive disorder from the CBT-only treatment condition of a larger randomized clinical trial were included in the current study. Participants engaged in a 20-session, 11-week, school-based CBT group intervention (ACTION Treatment; Stark et al., 2006). Depressive symptoms were assessed pre- and posttreatment, and intervention components were coded based on review of audio recordings of treatment sessions. Data were examined using two-level mixed-effects models using hierarchical linear modeling with full maximum likelihood estimation. Results indicated that higher quality behavioral intervention components were associated with greater improvement in posttreatment depression scores, higher quality cognitive intervention components were marginally associated with worsening posttreatment depression scores, and relational intervention components were not associated with depression outcome. Age significantly moderated the relationships between intervention components and depression outcome, with younger female participants benefiting most from higher quality behavioral and relational intervention components. These findings provide preliminary evidence about the differential impact of CBT components on depression treatment outcome for young female participants, with consideration of age as a moderator. This study highlights the importance of continuing to dismantle CBT treatment components for youth depression, as such findings can be used to design more potent, developmentally tailored interventions.     

Symptom Dimension Response in Children and Adolescents with Obsessive-Compulsive Disorder

This report examined the nature of obsessive-compulsive disorder (OCD) symptoms nominated for treatment and investigate improvement in OCD symptom dimensions. Youth with OCD (N = 71) participated in a clinical trial that compared exposure-based cognitive behavior therapy (CBT) to psychoeducation plus relaxation training (PRT). Participants completed a baseline assessment to characterize OCD severity. Next, parents and youth collaboratively developed an OCD symptom treatment hierarchy. Afterward, these symptoms were independently reassessed at each session by youth and parents. After 12 sessions, a posttreatment assessment was completed by independent evaluators. A greater incidence of baseline aggressive/checking symptoms predicted a positive CBT treatment response. For parent ratings of youth distress, CBT outperformed PRT across symptom dimensions, but hoarding symptoms exhibited a slower rate of improvement relative to other dimensions across treatments. For youth distress ratings, CBT outperformed PRT across most symptom dimensions. Although symmetry/ordering symptoms exhibited a slower rate of improvement relative to other dimensions across treatments, post hoc tests found no difference in the average distress rating for symmetry/ordering symptoms between treatment groups. Finally, across symptom dimensions, parents reported a linear reduction in youth distress, whereas youth experienced a nonlinear reduction in distress that diminished over treatment. Exposure-based CBT is beneficial for OCD symptoms and remains the principle treatment for pediatric OCD. However, as symmetry/ordering symptoms exhibited improvement from CBT and PRT, there is some shared treatment mechanisms that improves these symptoms. Finally, as youth perceive diminishing distress reduction over time, clinicians are encouraged to employ appropriate reinforcement strategies in treatment.     

Evidence Base Update: 50 Years of Research on Treatment for Child and Adolescent Anxiety

Anxiety disorders are the most common mental health disorder among children and adolescents. We examined 111 treatment outcome studies testing 204 treatment conditions for child and adolescent anxiety published between 1967 and mid-2013. Studies were selected for inclusion in this review using the PracticeWise Evidence-Based Services database. Using guidelines identified by this journal (Southam-Gerow &; Prinstein, 2014 Southam-Gerow, M. A. &; Prinstein, M. J. (2014). Evidence base updates: The evolution of the evaluation of psychological treatments for children and adolescents. Journal of Clinical Child &; Adolescent Psychology, 43, 1–6. doi:10.1080/15374416.2013.855128[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]), studies were included if they were conducted with children and/or adolescents (ages 1–19) with anxiety and/or avoidance problems. In addition to reviewing the strength of the evidence, the review also examined indicators of effectiveness, common practices across treatment families, and mediators and moderators of treatment outcome. Six treatments reached well-established status for child and adolescent anxiety, 8 were identified as probably efficacious, 2 were identified as possibly efficacious, 6 treatments were deemed experimental, and 8 treatments of questionable efficacy emerged. Findings from this review suggest substantial support for cognitive-behavioral therapy (CBT) as an effective and appropriate first-line treatment for youth with anxiety disorders. Several other treatment approaches emerged as probably efficacious that are not primarily CBT based, suggesting that there are alternative evidence-based treatments that practitioners can turn to for children and adolescents who do not respond well to CBT. The review concludes with a discussion of treatments that improve functioning in addition to reducing symptoms, common practices derived from evidence-based treatments, mediators and moderators of treatment outcomes, recommendations for best practice, and suggestions for future research.     

Evidence Base Update on the Treatment of Early Childhood Anxiety and Related Problems

The controlled evaluation of treatments for early childhood anxiety and related problems has been a relatively recent area of investigation, and accordingly, trials examining early childhood anxiety treatment have not been well represented in existing systematic reviews of youth anxiety treatments. This Evidence Base Update provides the first systematic review of evidence supporting interventions specifically for the treatment of early childhood anxiety and related problems. Thirty articles testing 38 treatments in samples with mean age < 7.9 years (N = 2,228 children) met inclusion criteria. We applied Southam-Gerow and Prinstein’s (2014) review criteria, which classifies families of treatments according to one of five levels of empirical support—Well-Established, Probably Efficacious, Possibly Efficacious, Experimental, and of Questionable Efficacy. We found family-based cognitive-behavioral therapy (CBT) to be a Well-Established treatment, and Group Parent CBT and Group Parent CBT + Group Child CBT to both be Probably Efficacious treatments. In contrast, play therapy and attachment-based therapy are still only Experimental treatments for early childhood anxiety, relaxation training has Questionable Efficacy, and there is no evidence to date to speak to the efficacy of individual child CBT and/or medication in younger anxious children. All 3 currently supported interventions for early childhood anxiety entail exposure-based CBT with significant parental involvement. This conclusion meaningfully differs from conclusions for treating anxiety in older childhood that highlight the well-established efficacy of individual child CBT and/or medication and that question whether parental involvement in treatment enhances outcomes.     

Scalable Options for Extended Skill Building Following Didactic Training in Cognitive-Behavioral Therapy for Anxious Youth: A Pilot Randomized Trial

A sizable gap exists between the availability of evidence-based psychological treatments and the number of community therapists capable of delivering such treatments. Limited time, resources, and access to experts prompt the need for easily disseminable, lower cost options for therapist training and continued support beyond initial training. A pilot randomized trial tested scalable extended support models for therapists following initial training. Thirty-five postdegree professionals (43%) or graduate trainees (57%) from diverse disciplines viewed an initial web-based training in cognitive-behavioral therapy (CBT) for youth anxiety and then were randomly assigned to 10 weeks of expert streaming (ES; viewing weekly online supervision sessions of an expert providing consultation), peer consultation (PC; non-expert-led group discussions of CBT), or fact sheet self-study (FS; weekly review of instructional fact sheets). In initial expectations, trainees rated PC as more appropriate and useful to meet its goals than either ES or FS. At post, all support programs were rated as equally satisfactory and useful for therapists’ work, and comparable in increasing self-reported use of CBT strategies (b = .19, p = .02). In contrast, negative linear trends were found on a knowledge quiz (b = ?1.23, p = .01) and self-reported beliefs about knowledge (b = ?1.50, p < .001) and skill (b = ?1.15, p < .001). Attrition and poor attendance presented a moderate concern for PC, and ES was rated as having the lowest implementation potential. Preliminary findings encourage further development of low-cost, scalable options for continued support of evidence-based training.     

Cognitive‐behaviour therapy with youth: advances,challenges, and future directions

Cognitive‐behavioural therapy (CBT) is one of the most widely‐researched therapies for children and adolescents. In this paper, the general tenets of CBT are described, followed by a review of the treatment outcome literature. Overall, there is strong empirical support for CBT with internalizing disorders such as anxiety and depressive disorders whereas more moderate empirical support exists for CBT with externalizing disorders such as attention‐deficit hyperactivity disorder and conduct disorder. The relative efficacy of individual, family, and group forms of CBT is also examined. Finally, future directions for research on CBT are discussed, including (a) determining the focal person(s) of treatment; (b) the importance of field effectiveness trials; and (c) the integration of CBT with other approaches (e.g. function analytic techniques, acceptance‐based approaches). Copyright © 2000 John Wiley & Sons, Ltd.     

Cognitive–behavioural,pharmacological and psychosocial predictors of outcome during tapered discontinuation of benzodiazepine

Eighty‐six participants wishing to stop benzodiazepine and who met DSM‐IV (Diagnostic and Statistical Manual of Mental Disorders, 4th ed. American Psychological Association, 1994) criteria for anxiety disorder or insomnia were assessed pre‐ and post‐taper on clinical, pharmacological and psychosocial measures. An initial cohort of 41 participants received treatment as usual (taper only) plus physician counselling in the same clinic setting. A second cohort of 45 participants were randomly allocated to group cognitive–behavioural therapy (CBT) plus taper, or group support (GS) plus taper. At 3 months follow‐up, the outcomes in both the CBT and the GS subgroups were equivalent. Intention to treat analysis revealed a slight advantage to the CBT over the GS group and the CBT group showed higher self‐efficacy post‐taper. Over all 86 participants, a high‐baseline level of psychological distress, anxiety and dosage predicted a poor outcome, but increase in self‐efficacy contributed to a successful outcome particularly in those with initially poor baseline predictors. Although there was a decrease in positive affect during preliminary stages of tapered discontinuation compared to baseline, there was no significant overall increase in negative affect. Copyright © 2008 John Wiley & Sons, Ltd.     

Attachment as moderator of treatment outcome in major depression: a randomized control trial of interpersonal psychotherapy versus cognitive behavior therapy

Anxiety and avoidance dimensions of adult attachment insecurity were tested as moderators of treatment outcome for interpersonal psychotherapy (IPT) and cognitive- behavioral therapy (CBT). Fifty-six participants with major depression were randomly assigned to these treatment conditions. Beck Depression Inventory--II, Six-Item Hamilton Rating Scale for Depression scores, and remission status served as outcome measures. Patients higher on attachment avoidance showed significantly greater reduction in depression severity and greater likelihood of symptom remission with CBT as compared with IPT, even after controlling for obsessive-compulsive and avoidant personality disorder symptoms. Results were replicated across treatment completers and intent-to-treat samples. These results suggest that it is important to consider the interaction between attachment insecurity and treatment type when comparing efficacy of treatments.     

The treatment of social anxiety disorder

We review the available treatments for social anxiety disorder, focusing primarily on psychotherapeutic interventions for adults, but also giving briefer summaries of pharmacological treatments and treatments for children and adolescents. The most well-researched psychosocial treatments for social anxiety disorder are cognitive-behavioral therapies (CBTs), and meta-analyses indicate that all forms of CBT appear likely to provide some benefit for adults. In addition, there are several pharmacological treatments with demonstrated efficacy, and cognitive-behavioral interventions have some demonstrated efficacy for children and adolescents. We outline a number of concerns regarding this literature, including the questions of what influences treatment response and what role combinations of CBT and medication might have. Clearly, although a number of treatments appear well-established in regard to their effects on social anxiety disorder, a number of opportunities for future research remain, including the search for predictors of who will benefit from which treatment.     

Cognitive versus behavior therapy in the group treatment of obsessive-compulsive disorder

This study examined the effects of cognitive-behavior therapy (CBT) compared with traditional behavior therapy (exposure and response prevention [ERP]) in the group treatment of obsessive-compulsive disorder. Of the 76 participants who started treatment, 38 were wait-listed for 3 months before treatment to assess possible course effects. Both treatments were superior to the control condition in symptom reduction, with ERP being marginally more effective than CBT by end of treatment and again at 3-month follow-up. In terms of clinically significant improvement, treatment groups were equivalent on the conclusion of treatment, but 3 months later significantly more ERP participants met criteria for recovered status. Only 1 of 7 belief measures changed with treatment improvement, and the extent of this cognitive change was similar between CBT and ERP groups. Discussion includes consideration of optimal formats for the delivery of different types of treatment.     

The empirical status of cognitive-behavioral therapy: a review of meta-analyses

This review summarizes the current meta-analysis literature on treatment outcomes of CBT for a wide range of psychiatric disorders. A search of the literature resulted in a total of 16 methodologically rigorous meta-analyses. Our review focuses on effect sizes that contrast outcomes for CBT with outcomes for various control groups for each disorder, which provides an overview of the effectiveness of cognitive therapy as quantified by meta-analysis. Large effect sizes were found for CBT for unipolar depression, generalized anxiety disorder, panic disorder with or without agoraphobia, social phobia, posttraumatic stress disorder, and childhood depressive and anxiety disorders. Effect sizes for CBT of marital distress, anger, childhood somatic disorders, and chronic pain were in the moderate range. CBT was somewhat superior to antidepressants in the treatment of adult depression. CBT was equally effective as behavior therapy in the treatment of adult depression and obsessive-compulsive disorder. Large uncontrolled effect sizes were found for bulimia nervosa and schizophrenia. The 16 meta-analyses we reviewed support the efficacy of CBT for many disorders. While limitations of the meta-analytic approach need to be considered in interpreting the results of this review, our findings are consistent with other review methodologies that also provide support for the efficacy CBT.     

A Randomized Clinical Trial Comparing Individual Cognitive Behavioral Therapy and Child-Centered Therapy for Child Anxiety Disorders

This study compared individual cognitive behavioral therapy (CBT) and a supportive child-centered therapy (CCT) for child anxiety disorders on rates of treatment response and recovery at posttreatment and 1-year follow-up, as well as on real-world measures of emotional functioning. Youth (N = 133; ages 9–14) with anxiety disorders (generalized, separation, and/or social anxiety) were randomized using a 2:1 ratio to CBT (n = 90) or CCT (n = 43), which served as an active comparison. Treatment response and recovery at posttreatment and 1-year follow-up were assessed by Independent Evaluators, and youth completed ecological momentary assessment of daily emotions throughout treatment. The majority of youth in both CBT and CCT were classified as treatment responders (71.1% for CBT, 55.8% for CCT), but youth treated with CBT were significantly more likely to fully recover, no longer meeting diagnostic criteria for any of the targeted anxiety disorders and no longer showing residual symptoms (66.7% for CBT vs. 46.5% for CCT). Youth treated with CBT also reported significantly lower negative emotions associated with recent negative events experienced in daily life during the latter stages of treatment relative to youth treated with CCT. Furthermore, a significantly higher percentage of youth treated with CBT compared to CCT were in recovery at 1-year follow-up (82.2% for CBT vs. 65.1% for CCT). These findings indicate potential benefits of CBT above and beyond supportive therapy on the breadth, generalizability, and durability of treatment-related gains.     

Treatment of child anxiety: an exploratory study of the role of maternal anxiety and behaviours in treatment outcome

Anxiety disorders are common among parents of anxious children and have been found to impede child treatment outcomes, yet it is unclear whether it is parental anxiety that needs to be targeted in therapy or associated parental behaviours. Twenty‐two children (6–12 years) with a current anxiety disorder and their mothers received cognitive–behavioural treatment (CBT) for child anxiety. In addition, of the 12 mothers who met criteria for a current anxiety disorder, 6 received CBT for their own disorder. Assessments were made of the mother–child interaction. The main findings were: (1) children did less well from treatment where their mothers had a current anxiety disorder; (2) treatment of maternal anxiety disorder did not improve child treatment outcome; and (3) maternal overinvolvement and expression of fear was associated with child treatment outcome. The results suggest that in the context of maternal anxiety disorder, child treatment outcome may be improved by specifically targeting parenting behaviours. Copyright © 2008 John Wiley & Sons, Ltd.     

A comparison of the efficacy and acceptability of group versus individual cognitive behaviour therapy in the treatment of panic disorder and agoraphobia in primary care

Panic disorder and agoraphobia is a prevalent clinical condition which places heavy demands on treatment resources in primary care. The efficient delivery of evidence‐based psychological treatment for this disorder is therefore important. Previous research has investigated both individual and group treatment formats for cognitive behaviour therapy (CBT) for panic disorder and agoraphobia. These two modalities of treatment delivery are, however, rarely compared within the same study format. Also little is known of patients' preferences regarding treatment delivery formats. The present study investigated the relative efficacy of a group treatment CBT and an individual treatment CBT in comparison with a waiting list control group in the treatment of panic disorder with or without agoraphobia in primary care. Ninety‐seven patients suffering from DSM‐IV panic disorder with or without agoraphobia were randomly allocated to receive either group CBT, individual CBT, or waiting list control. All patients were seen by the same therapist and all received an identical treatment manual. Treatment response was measured by blind assessor, therapist and patient‐rated measures of anxiety, depression, and agoraphobic avoidance, and was analysed in terms of both traditional statistical significance and clinical significance of outcome. At treatment end‐point, in terms of traditional statistical significance, both the group and individual CBT were significantly superior to waiting list control but did not differ significantly from each other. When clinical significance of outcome at treatment end‐point was considered, individual CBT showed a significant advantage over both group CBT and waiting list control. At 3‐month follow‐up, however, the individual CBT treatment group showed significant superiority to the group CBT treatment on clinical significance of outcome on one outcome measure only. This was principally due to a reduction in the proportion of patients achieving criteria of clinically significant change in the individual CBT treatment group over the 3‐month follow‐up period. When given a free choice of group or individual CBT at the end of the waiting list period, the overwhelming majority (95%) of the waiting list patients chose individual CBT. The implications of these findings for future research and for wider clinical practice are discussed. Copyright © 2004 John Wiley & Sons, Ltd.     

Prognostic indices with brief and standard CBT for panic disorder: I. Predictors of outcome

BACKGROUND: Although the effectiveness of cognitive behavioural therapy (CBT) in the management of panic disorder (PD) is now well established, there have been few studies of predictors of outcome with this patient group using clinical effectiveness trial data, a hypothesis-testing model, and a dependent measure of clinically significant change.METHOD: The data for this study came from a randomized controlled trial of three forms of CBT delivery for PD with and without agoraphobia (two 6-week CBT programmes, one of which was computer assisted, and one therapist-directed 12-week CBT programme), comprising a total of 186 patients across two sites. Based on previous related research, five hypothesized predictors of post-treatment and follow-up outcome were identified and examined, using a series of bivariate and multivariate analyses. RESULTS: The results in general supported the hypotheses. Strength of blood/injury fears, age of initial onset of panic symptoms, co-morbid social anxieties and degree of agoraphobic avoidance were predictive of both measures of post-treatment outcome. Degree of residual social difficulties and the continued use of anxiolytics at post-treatment were also shown to predict poor outcome at the 6-month follow-up. However, strength of continuing dysfunctional agoraphobic cognitions by the end of active treatment did not predict outcome at follow-up for the sample as a whole. CONCLUSIONS: The identification of consistent predictors of outcome with CBT has many clinical and research benefits. As CBT, however, is being delivered increasingly in a variety of brief formats, further research is required to identify moderators of response to these 'non-standard' treatment formats.