Cognitive Behavioral Program for the Prevention of Depression in At-Risk Adolescents: Isolating the Effects of Dose.

The current study estimated effects of intervention dose (attendance) of a cognitive behavioral prevention (CBP) program on depression-free days (DFD) in adolescent offspring of parents with a history of depression. As part of secondary analyses of a multi-site randomized controlled trial, we analyzed the complete intention-to-treat sample of 316 at-risk adolescents ages 13-17. Youth were randomly assigned to the CBP program plus usual care (n=159) or to usual care alone (n=157). The CBP program involved 8 weekly acute sessions and 6 monthly continuation sessions. Results showed that higher CBP program dose predicted more DFDs, with a key threshold of approximately 75% of a full dose in analyses employing instrumental variable methodology to control multiple channels of bias. Specifically, attending at more than 75% of acute phase sessions led to 45.3 more DFDs over the 9-month period post randomization, which accounted for over 12% of the total follow-up days. Instrument sets were informed by study variables and external data including weather and travel burden. In contrast, conventional analysis methods failed to find a significant dose-outcome relation. Application of the instrumental variable approach, which better controls the influence of confounding, demonstrated that higher CBP program dose resulted in more DFDs.

Early indicators of response to transdiagnostic treatment of pediatric anxiety and depression.

BACKGROUND: Pediatric anxiety and depression are prevalent, impairing, and highly comorbid. Available evidence-based treatments have an average response rate of 60%. One path to increasing response may be to identify likely non-responders midway through treatment to adjust course prior to completing an episode of care. The aims of this study, thus, were to identify predictors of post-intervention response assessing (a) mid-treatment symptom severity, (b) session-by-session treatment process factors, and (c) a model optimizing the combination of these. METHOD: Data were drawn from the treatment arm (N = 95, ages 8-16) of a randomized transdiagnostic intervention trial (Msessions = 11.2). Mid-point measures of youth- and parent-reported anxiety and depression were collected, and therapists rated homework completion, youth and parent engagement, and youth therapeutic alliance at each session. Logistic regression was used to predict response on the Clinical Global Impression Improvement Scale (CGI-I ≤2) rated by independent evaluators masked to treatment condition. RESULTS: Mid-point symptom measures were significant predictors of treatment response, as were therapist-ratings of youth and parent engagement, therapeutic alliance, and homework completion. Therapist ratings were significant when tested as mean ratings summing across the first eight sessions of treatment (all ps < .004) and at individual session points (all ps <0.05). A combined prediction model included youth-reported anxiety, parent-reported depression, youth engagement at Session 2, and parent engagement at Session 8. This model correctly classified 76.5% of youth as non-responders and 91.3% as responders at post-treatment (Nagelkerke R2 = .59, χ2 (4, 80) = 46.54, p < .001). CONCLUSION: This study provides initial evidence that response to transdiagnostic intervention for pediatric anxiety and depression may be reliably predicted by mid-point. These data may serve as foundational evidence to develop adaptive treatment strategies to personalize intervention, correct treatment course, and optimize outcomes for youth with anxiety and depression.

The Association between Age and Experienced Emotions in Hoarding Disorder.

Objectives: Hoarding disorder (HD) is conceptualized as a fear-based disorder and exposure to sorting/discarding possessions is a core part of treatment. However, there has been no investigation of age-related differences in emotional reaction to sorting. The objective of this study was to explore the association between age and affective response during a sorting task.Methods: Forty-nine adults with HD completed a standardized sorting task. Participants reported their current emotion before and after the sorting task and reported their subjective distress throughout the task.Results: Older participants reported significantly lower distress ratings. Only 43% of participants reported fear prior to the task and 22% reported fear after the task. The probability of reporting fear before and after the task decreased significantly with age.Conclusions: Fear may not be the emotion experienced when discarding items, particularly for older adults with HD. Future work should focus on mechanisms of action in HD treatment.Clinical Implications: Clinicians should not assume fear or anxiety to be the primary emotional response in older adults with HD when engaged in an exposure to sorting/discarding. Older hoarding patients with a more fear-oriented aversion to sorting possessions may require a treatment emphasis on increasing the percentage of items discarded.

The Child and Adolescent Services Assessment: Interrater Reliability and Predictors of Rater Disagreement.

The current study evaluated the interrater reliability of the Child and Adolescent Services Assessment (CASA), a widely used structured interview measuring pediatric mental health service use. Interviews (N = 72) were randomly selected from a pediatric effectiveness trial, and audio was coded by an independent rater. Regressions were employed to identify predictors of rater disagreement. Interrater reliability was high for items (> 94%) and summary metrics (ICC > .79) across service sectors. Predictors of disagreement varied by domain; significant predictors indexed higher clinical severity or social disadvantage. Results support the CASA as a reliable and robust assessment of pediatric service use, but administrators should be alert when assessing vulnerable populations.

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.

Treatment and Prevention of Depression and Anxiety in Youth: Test of Cross-Over Effects.

Anxiety and depression are highly comorbid and share several common etiological processes. Therefore, it may be more efficient to develop interventions that treat or prevent these problems together rather than as separate entities. The present meta-analytic review examined whether interventions for children and adolescents that explicitly targeted either anxiety or depression showed treatment specificity or also impacted the other outcome (i.e. cross-over effects). We addressed this question both within the same type of study (i.e. treatment, prevention) and across study types. Only randomized controlled trials (RCTs) that assessed both constructs with dimensional measures were included in this review. For treatment studies, RCTs targeting anxiety (n = 18) showed significant effects on both anxious and depressive symptoms, although more strongly on anxiety than depression; similarly, RCTs treating depression (n = 9) yielded significant effects on both depressive and anxious symptoms, but stronger effects on depression than anxiety. Thus, there were cross-over effects in treatments purportedly targeting either anxiety or depression, and also treatment specificity, such that larger effects were seen for the target problem at which the treatment was aimed. Anxiety prevention studies (n = 14) significantly affected anxious, but not depressive symptoms, indicating no cross-over effect of anxiety prevention trials on depression. For depression prevention studies (n = 15), the effects were not significant for either depressive or anxiety symptoms, although the effect was significantly larger for depressive than for anxious symptoms. Post-hoc analyses revealed that the effect on depressive symptoms was significant in depression preventions trials of targeted but not universal samples. Implications for transdiagnostic interventions are discussed.

Parent and youth report of youth anxiety: evidence for measurement invariance.

BACKGROUND: We characterized parent-youth disagreement in their report on the Screen for Child Anxiety Related Emotional Disorders (SCARED) and examined the equivalence of this measure across parent and youth report. METHODS: A clinically referred sample of 408 parent-youth dyads (M age youth = 14.33, SD = 1.89; 53.7% male; 50.0% Non-Hispanic White (NHW), 14.0% Hispanic, 29.7% African-American) completed the SCARED. We examined (a) differences between parents and youth in the total number of symptoms reported (difference scores) and in their ratings of specific symptoms (q correlations), (b) demographic factors associated with these indices, and (c) equivalence of the pattern and magnitude of factor loadings (i.e., configural and metric invariance), as well as item thresholds and residual variances, across informants. RESULTS: The mean difference score was -2.13 (SD = 14.44), with youth reporting higher levels of symptoms, and the mean q correlation was .32 (SD = .24). Difference scores were greater for African-American dyads than NHW pairs. We found complete configural, metric, and residual invariance, and partial threshold invariance. Differences in thresholds did not appear to reflect systematic differences between parent and youth report. Findings were comparable when analyses were conducted separately for NHW and ethnic minority families. CONCLUSION: Findings provide further evidence for the importance of considering youth report when evaluating anxiety in African-American families. The SCARED was invariant across informant reports, suggesting that it is appropriate to compare mean scores for these raters and that variability in parent and youth report is not attributable to their rating different constructs or using different thresholds to determine when symptoms are present.

Shifting the treatment model: impact on engagement in outpatient therapy.

Attrition in youth outpatient mental health clinics ranges from 30 to 70 % and often occurs early in treatment. We implemented specific treatment planning strategies designed to reduce early attrition. Following implementation, 14.3 % of clients dropped out during the first five sessions compared to 26.1 % in the historical control (p < 0.001). During treatment, 33.6 % of clients dropped out in the intervention compared to 55.5 % in the historical control (p < 0.001). Engagement is central to the therapeutic process and may be particularly relevant early in treatment. Implementing evidence-based strategies to promote a collaborative relationship between the family and the clinician may increase engagement and decrease attrition.

Impact of trauma exposure and depression comorbidity on response to transdiagnostic behavioral therapy for pediatric anxiety and depression.

By adolescence, two-thirds of youth report exposure to at least one traumatic event, yet the impact of trauma history is not routinely considered when evaluating the effect of psychotherapeutic interventions. Trauma may be a particularly important moderator of the effects of transdiagnostic therapies for emotional disorders, as trauma exposure is associated with risk for the development of comorbid depression and anxiety. The current study examined the history of trauma exposure and the presence of clinically significant depression as moderators of treatment outcomes in the Brief Behavioral Therapy (BBT) trial, the largest study of transdiagnostic psychotherapy for youth. Youths (age 8-16 years) were randomized to BBT (n = 89) based in pediatric primary care or assisted referral to outpatient community care (ARC; n = 86). Clinical response, functioning, anxiety symptoms, and depression symptoms were assessed at post-treatment (Week 16) and at follow-up (Week 32). A significant three-way interaction emerged between the treatment group, comorbid depression, and trauma exposure. BBT was broadly effective for 3/4 of the sample, but, for anxious-depressed youth with trauma exposure, BBT never significantly separated from ARC. Differences in outcome were not accounted for by other participant characteristics or by therapist-rated measures of alliance, youth engagement, or homework completion. Implications for models of learning and for intervention theory and development are discussed.

Augmentation of youth cognitive behavioral and pharmacological interventions with attention modification: a preliminary investigation.

BACKGROUND: Recent research suggests the efficacy of attention modification programs (AMP) in treating adult anxiety.([1]) Though some research supports the success of AMP treatment in anxious youths,([2, 3]) to date no study has examined the efficacy of AMP as an adjunctive treatment to other psychosocial and pharmacological interventions for anxious youths within the community. METHODS: In the current study, we examined the efficacy of AMP as an adjunctive treatment to standard care at a residential anxiety treatment facility. Adolescents (N = 42) completed either an active (attention modification program, AMP; n = 21) or a control (attention control condition, ACC; n = 21) condition, in addition to the facility's standard treatment protocol, which included cognitive behavioral therapy with or without medication. RESULTS: While anxiety symptoms decreased for participants across both groups, participants in the AMP group experienced a significantly greater decrease in anxiety symptoms from point of intake to point of discharge, in comparison to participants in the ACC group. CONCLUSIONS: These results suggest that AMP is an effective adjunctive treatment to the standard treatments of choice for anxiety disorders, and may hold promise for improving treatment response in highly anxious youths.

Racial/ethnic differences in parenting behaviors among depressed parents.

Low parental warmth and high control are associated with parental depression and with the development of depression in children. The majority of this research, however, has focused on non-Hispanic White (NHW) parents. The present study tested whether parenting behaviors differed by race/ethnicity in a sample (N = 169) of parents with a history of depression. Participants were drawn from a randomized trial designed to prevent depression in at-risk adolescents (ages 9-15 years old). All participating parents had a current or past depressive episode within the youth's lifetime. Parents self-classified as 67.5% NHW, 17.2% Latinx (LA), and 15.4% Black (BL). Youths and parents completed standardized positive and negative interaction tasks; trained raters coded the videotaped interactions for parental warmth and control. Analyses examined the impact of race/ethnicity, current parent depression symptoms, context of the discussion (positive/negative task), and demographic covariates on observed parenting behaviors. Results revealed significant interactions among race/ethnicity, depression, and task type. Differences in warmth and control between racial/ethnic groups were more likely to be observed in negative interactions and when parents' depression symptoms were lower. In these circumstances, BL parents were rated as higher in control and lower in warmth than NHW parents. Results add to the literature on racial/ethnic differences in parenting among parents with a history of depression and highlight the importance of assessing parenting in context to capture more subtle patterns of interactions between parents and offspring. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Brief Behavioral Therapy for Anxiety and Depression in Pediatric Primary Care: Breadth of Intervention Impact.

OBJECTIVE: To report on broad-based outcomes of the Brief Behavioral Therapy (BBT) trial for pediatric anxiety and depression. Secondary data analyses expand on previous reports by assessing diagnostic remission and independent functioning, impact on targeted psychopathology, and spillover effects on non-targeted outcomes. METHOD: Youth (N = 185; 8-16.9 years; 58% female; 78% White; 21% Hispanic) with anxiety and/or depression were eligible for this multi-site trial. Enrolled youth were randomly assigned to receive 8 to 12 sessions of BBT in primary care or assisted referral to outpatient care (ARC). Assessments were conducted 16 and 32 weeks post randomization. RESULTS: BBT was superior to ARC on remission of all targeted diagnoses (week 16: 56.8% vs 28.2%, p < .001; week 32: 62.5% vs 38.9%, p = .004), clinician-rated independent functioning (week 16: 75.0% vs 45.7%, p < .001; week 32: 81.2% vs 55.7%, p < .001), and on measures of anxiety, depression, suicide items, total comorbid behavioral and emotional problems, and hyperactivity (d = 0.21-0.49). Moderation analyses revealed superior outcomes for Hispanic youth in BBT vs ARC for diagnostic remission, anxiety, emotional problems, and parent-child conflict. Youth depression at baseline moderated effects on peer problems and parent-child conflict, with effects favoring BBT. Significant main and moderated effects of BBT on change in non-targeted outcomes were largely mediated by change in anxiety (24.2%-49.3% of total effects mediated). CONCLUSION: BBT has positive effects on youth, mediated by the strong impact of the intervention on anxiety. Analyses continue to support positive outcomes for Hispanic youth, suggesting that BBT is a broadly effective transdiagnostic treatment option for diverse populations. CLINICAL TRIAL REGISTRATION INFORMATION: Brief Cognitive Behavioral Therapy (CBT) for Pediatric Anxiety and Depression in Primary Care; https://clinicaltrials.gov; NCT01147614.

Reduction in avoidance mediates effects of brief behavioral therapy for pediatric anxiety and depression.

Brief behavioral therapy (BBT) is an efficacious transdiagnostic intervention for pediatric anxiety and depression that targets behavioral avoidance as a key mechanism. It is unknown if change in avoidance mediates treatment effects, as theorized. Data on avoidance at baseline and Week 16 were available on 52 youth (ages 8-16 years) from a randomized controlled trial (Weersing, Jeffreys, et al., 2017) comparing BBT and assisted referral to community care (ARC). BBT had significant effects on youth-reported behavioral avoidance, and significant indirect effects on functioning and anxiety, statistically mediated through changes in youth-reported behavioral avoidance. Change in youth-reported avoidance was not a significant mediator of depression. Parent-report of avoidance was not impacted by treatment and was not a significant mediator. Overall, BBT appears to be an effective treatment for targeting behavioral avoidance, which in turn, may improve functioning and lessen anxiety. CLINICAL TRIAL REGISTRATION INFORMATION: https://clinicaltrials.gov; NCT01147614.

Cross-ethnic measurement equivalence of the SCARED in an outpatient sample of African American and non-Hispanic White youths and parents.

The present study evaluated the measurement equivalence of the Screen for Child Anxiety Related Emotional Disorders (SCARED) in a clinical sample of non-Hispanic White (NHW) and African American (AA) youths and parents. In addition, we explored the concurrent criterion validity of parent report on the SCARED to a parent diagnostic interview. Cross-ethnic measurement equivalence was examined in both youth self-report (ages 11-18; N = 374) and parent report (youth ages 5-18; N = 808) using multiple group analysis. Sensitivity, specificity, positive predictive value, and negative predictive value of the SCARED parent report were also examined. The original five-factor structure of the SCARED was replicated using confirmatory factor analysis for both groups using parent and youth report, although factor loadings were not equivalent across groups. Sensitivity and specificity of the SCARED-P clinical cutoff score (Total ≥25) to anxiety diagnoses were acceptable in both ethnic groups. Although evidence for the cross-ethnic equivalence of SCARED was limited, results suggest a similar structure of anxiety symptoms across NHW and AA youths while demonstrating sensitivity in symptom-level differences in anxiety expression. Overall, results provide preliminary evidence for the SCARED as an acceptable screening tool for anxiety symptoms in NHW and AA youths.

Anxiety, Depression, and Somatic Distress: Developing a Transdiagnostic Internalizing Toolbox for Pediatric Practice.

Anxiety, depression, and somatic complaints are a common set of comorbid problems in children and adolescents. This "internalizing cluster" is highly prevalent, impairing during youth and into adulthood, and has substantial impacts on health-care systems. Fortunately, these problem areas may share several etiological factors and, thus, respond to similar interventions. In this paper, we present (a) the rationale for focusing on this cluster, (b) clinical theory on transdiagnostic processes uniting these problems, (c) description of core treatment techniques for this group, with a description of clinical outcomes for two sample cases, and (d) implications of this approach for new transdiagnostic treatment development and everyday clinical practice.

Family based treatment of anxiety disorders: A review of the literature (2010-2019).

Anxiety disorders are the most common and impairing mental health problems across the lifespan. Familial factors are strongly implicated in the onset and maintenance of anxiety, but available evidence-based treatments are usually individual-focused. The aim of this review was to evaluate the current evidence base (2010-2019) of family based interventions addressing youth and adult anxiety and highlight findings comparing family based and individual-focused treatments. A systematic literature search was conducted. Articles were considered if they targeted primarily anxiety-related issues and utilized a randomized controlled trial design, resulting in 22 included youth studies. No adult studies met criteria for inclusion. Overall, family based treatments performed better than no-treatment controls and as well as individual-based interventions, with some evidence that family based interventions might outperform individual-based ones in certain populations (i.e., autism). Family based interventions may represent a good alternative for anxiety treatment in youth. Additional research on family based treatment for anxiety is adults is needed.

Promoting Racial/Ethnic Equity in Psychosocial Treatment Outcomes for Child and Adolescent Anxiety and Depression.

Anxiety and depression are the most prevalent and least treated pediatric mental health problems. Racial/ethnic minority youths face greater risks for developing anxiety and depression and experience higher burden as they are less likely to receive adequate mental health services for these conditions or to have their needs met. Further, standard evidence-based interventions for youth anxiety and depression may show diminished effects with racial/ethnic minority youths and with families of lower socioeconomic status. While community-level interventions to combat structural racism and reduce population-level risk are sorely needed, many youths will continue to require acute treatment services for anxiety and depression and interventionists must understand how to bring equity to the forefront of care. In this review, we adopt a health system framework to examine racial/ethnic disparities in system-, intervention-, provider-, and patient-level factors for psychosocial treatment of pediatric anxiety and depression. Current evidence on disparities in access and in efficacy of psychosocial intervention for anxious and depressed youths is summarized, and we use our work in primary care as a case example of adapting an intervention to mitigate disparities and increase equity. We conclude with recommendations for disparity action targets at each level of the health system framework and provide example strategies for intervening on these mechanisms to improve the outcomes of racial/ethnic minority youths.

Health Service Utilization Among Children and Adolescents with Posttraumatic Stress Disorder: A Case-Control Study.

OBJECTIVE: Trauma exposure is widely prevalent, with more than 60% of adolescents having experienced at least 1 traumatic event and a third of those at high risk to develop posttraumatic stress disorder (PTSD). Data are scarce and out of date on the services children and adolescents with PTSD receive, impeding efforts to improve care and outcomes. This study examines health service use for a large and diverse sample of children and adolescents with and without a diagnosis of PTSD. METHOD: Using a matched case-control study, we gathered information from 4 large health care systems participating in the Mental Health Research Network. Data from each site's electronic medical records on diagnoses, health care encounters, and demographics were analyzed. Nine hundred fifty-five 4- to 18-year-olds with a diagnosis of PTSD were identified and matched on a 1:5 ratio to 4770 controls. We compared cases with controls on frequency of service use in outpatient primary care, medical specialty care, acute care, and mental health care. We also assessed psychotropic medication use. RESULTS: Children and adolescents diagnosed with PTSD used nearly all physical and mental health service categories at a higher rate than controls. However, one-third of children and adolescents did not receive even 1 outpatient mental health visit (36.86%) during the year-long sampling window. CONCLUSION: Our findings suggest that children and adolescents diagnosed with PTSD may have unmet mental health needs. They are high utilizers of health services overall, but lower utilizers of the sectors that may be most helpful in resolving their symptoms.

Predictors of treatment attrition among an outpatient clinic sample of youths with clinically significant anxiety.

Predictors of treatment attrition were examined in a sample of 197 youths (ages 5-18) with clinically-significant symptoms of anxiety seeking psychotherapy services at a community-based outpatient mental health clinic (OMHC). Two related definitions of attrition were considered: (a) clinician-rated dropout (CR), and (b) CR dropout qualified by phase of treatment (pre, early, or late phases) (PT). Across both definitions, rates of attrition in the OMHC sample were higher than those for anxious youths treated in randomized controlled trials, and comorbid depression symptoms predicted dropout, with a higher rate of depressed youths dropping out later in treatment (after 6 sessions). Using the PT definition, minority status also predicted attrition, with more African-American youths lost pre-treatment. Other demographic (age, gender, single parent status) and clinical (externalizing symptoms, anxiety severity) characteristics were not significantly associated with attrition using either definition. Implications for services for anxious youths in public service settings are discussed. Results highlight the important role of comorbid depression in the treatment of anxious youth and the potential value of targeted retention efforts for ethnic minority families early in the treatment process.

Cost-effectiveness of Brief Behavioral Therapy for Pediatric Anxiety and Depression in Primary Care.

Importance: Youth anxiety and depression are common and undertreated. Pediatric transdiagnostic interventions for anxiety and/or depression may be associated with improved access to treatment among youths. Objective: To evaluate the cost-effectiveness of a pediatric transdiagnostic brief behavioral therapy (BBT) program for anxiety and/or depression compared with assisted referral to community outpatient mental health care (ARC). Design, Setting, and Participants: In this economic evaluation, an incremental cost-effectiveness analysis was performed from the societal perspective using data from a randomized clinical trial of youths with full or probable diagnoses of anxiety or depression who were recruited from pediatric clinics in San Diego, California, and Pittsburgh, Pennsylvania. The trial was conducted from October 6, 2010, through December 5, 2014, and this analysis was performed from January 1, 2019, through October 20, 2020. Interventions: In the randomized clinical trial, youths were randomized to BBT (n = 95) or ARC (n = 90). The BBT program consisted of 8 to 12 weekly 45-minute sessions of behavioral therapy delivered in pediatric clinics by master's-level therapists. Families randomized to ARC received personalized referrals to mental health care and telephone calls to support access to care. Main Outcomes and Measures: Anxiety-free days, depression-free days, quality-adjusted life-years (QALYs), and costs based on incremental cost-effectiveness ratios from intake through 32-week follow-up. A cost-effectiveness acceptability curve for QALYs was used to assess the probability that BBT was cost-effective compared with ARC over a range of amounts that a decision-maker might be willing to pay for an additional outcome. Results: Enrolled patients included 185 youths (mean [SD] age, 11.3 [2.6] years; 107 [57.8%] female; 144 [77.8%] White; and 38 [20.7%] Hispanic). Youths who received BBT experienced significantly more anxiety-free days (difference, 28.63 days; 95% CI, 5.86-50.71 days; P = .01) and QALYs (difference, 0.026; 95% CI, 0.009-0.046; P = .007) compared with youths who received ARC. Youths who received BBT experienced more depression-free days than did youths who received ARC (difference, 10.52 days; 95% CI, -4.50 to 25.76 days; P = .18), but the difference was not statistically significant. The mean incremental cost-effectiveness ratio was -$41 414 per QALY (95% CI, -$220 601 to $11 468). The cost-effectiveness acceptability curve analysis indicated that, at a recommended willingness-to-pay threshold of $50 000 per QALY, the probability that BBT would be cost-effective compared with ARC at 32 weeks was 95.6%. Conclusions and Relevance: In this economic evaluation, BBT in primary care was significantly associated with better outcomes and a greater probability of cost-effectiveness at 32 weeks compared with ARC. The findings suggest that transdiagnostic BBT may be associated with improved youth anxiety and functioning at a reasonable cost.