Background Adolescent depression is a major public health concern with limited access to effective treatments. Behavioural activation (BA) is a suitable intervention for digital delivery, but definitive adolescent trials are scarce. Objective To evaluate whether therapist-guided and self-guided internet-based BA (I-BA) are more efficacious and cost-effective than treatment as usual (TAU) for adolescents with mild to moderate major depressive disorder (MDD). Methods Single-blinded, parallel-group randomised controlled trial with economic evaluation. A total of 219 adolescents (13–17 years) with mild-moderate MDD were randomised (1:1:1) to 10 weeks of therapist-guided I-BA, self-guided I-BA or TAU. Both I-BA interventions included adolescent and parent modules. Primary outcome: change in depression severity (Children’s Depression Rating Scale-Revised, CDRS-R, range 17–113) from baseline to 3-month follow-up (primary endpoint), assessed by blinded evaluators. Analyses included all randomised participants, with statisticians blinded to allocation. A health economic evaluation was performed at the primary endpoint. Findings Baseline CDRS-R indicated clinically significant depression (mean 57.1, threshold ≥40). Retention at the primary endpoint was 82.6%. Mean reductions were 17.0 (therapist-guided I-BA), 16.0 (self-guided I-BA) and 11.6 (TAU), bringing both I-BA groups below the clinical cut-off. Therapist-guided I-BA showed greater reductions than TAU (estimated mean difference −4.68; 95% CI −0.05 to −9.30; p=0.048, d =−0.47; 95% CI 0.00 to −0.93), while self-guided I-BA was not statistically superior (estimated mean difference −3.44; 95% CI −8.05 to 1.17, p=0.14, d =−0.37; 95% CI −0.86 to 0.12). The predefined six-point clinical important difference was not met. Results were sensitive to modelling: significance disappeared with random slopes but effect estimates were similar; baseline-adjusted analyses favoured both I-BA arms. Both I-BA options had lower costs than TAU (p=0.03, p<0.001), with self-guided I-BA being the most economical. Conclusions Therapist-guided I-BA reduced depressive symptoms at lower cost than TAU, but clinical importance and robustness are uncertain. Self-guided I-BA showed no clear superiority but was cost-efficient. Clinical implications Therapist-guided I-BA may increase access to evidence-based care for adolescents with MDD, though findings require cautious interpretation. Self-guided I-BA may be useful where therapist access is limited, but more research is needed.

Objectives Trauma-focused cognitive behavioural therapy (TF-CBT) is the established first-line treatment for paediatric post-traumatic stress disorder (PTSD), but access to evidence-based care remains limited. This study aimed to evaluate the feasibility and acceptability of a therapist-guided, 12 week, internet-delivered TF-CBT (iTF-CBT) programme for adolescents with PTSD and to explore preliminary changes in PTSD symptoms.Design Single-group feasibility trial.Setting Save the Children, Sweden.Participants Twenty-two adolescents (13–17 years, 82% female) with primary PTSD.Interventions A 12 week, therapist-guided, asynchronous, internet-delivered TF-CBT comprising eight modules and parallel caregiver modules with joint adolescent–caregiver activities.Outcomes Feasibility measures included recruitment pace, participant retention, treatment adherence (module completion) and therapist time. Acceptability was evaluated through satisfaction, credibility, negative effects and reported adverse events. Within-group changes in PTSD severity using independent evaluator-rated Clinician-Administered PTSD Scale (CAPS-CA-5) and the self-reported Child and Adolescent Trauma Screen 2 (CATS-2) were used as indicators of potential clinical change. Assessments occurred at baseline, during treatment, post-treatment and at 1 month follow-up (primary endpoint).Results Recruitment was completed after 7 months of active enrolment. Retention and adherence were high, satisfaction and credibility ratings were favourable, and no intervention-related serious adverse events occurred. Within-group improvements were observed at the primary endpoint, with large reductions on CAPS-CA-5 (Cohen’s d=1.27) and CATS-2 (Cohen’s d=1.51). At follow-up, 47.6% of participants no longer met criteria for PTSD.Conclusions Therapist-guided iTF-CBT for adolescents with PTSD was safe, feasible, acceptable and associated with potentially meaningful symptom improvements. These findings support further evaluation in larger, controlled trials to determine efficacy, cost-effectiveness and long-term outcomes.Trial registration number NCT06185244.

Anxiety disorders are common in children and adolescents, but constrained resources limit access to cognitive-behavioral therapy (CBT). Stepped and stratified care models offer different ways to organize care. Stepped care starts with lower-resource CBT and escalates when needed, whereas stratified care matches CBT format to patient complexity from the outset. Economic evidence comparing these models remains scarce. We conducted a pilot economic evaluation alongside an RCT of 51 youths with anxiety disorders to examine the feasibility of health-economic evaluation and generate preliminary cost-effectiveness estimates. Participants were randomized to stepped care (guided internet-delivered CBT [iCBT] with escalation to in-person CBT if needed, n = 25) or stratified care (baseline allocation to guided iCBT or in-person CBT with escalation to in-person CBT if needed, n = 26). Health outcomes and costs from the healthcare and societal perspectives were collected over 6 months, with the base case analysis estimating the change in utility scores. Incremental cost-effectiveness ratios (ICERs) were estimated using non-parametric bootstrapping. Stratified care yielded greater, though not statistically significant, health gains than stepped care and was dominant from the societal perspective. From the healthcare perspective, the AUC-derived quality-adjusted life years (QALY) sensitivity analysis yielded an ICER of USD 6,878 per QALY gained, although estimates remained uncertain given the small pilot sample. Subgroup analyses by age, sex, and treatment response generally supported these patterns while highlighting heterogeneity. These findings support the feasibility of conducting economic evaluations of care models in routine youth mental health care, but larger trials are needed to provide more precise cost-effectiveness estimates and inform service-delivery policy.

Body dysmorphic disorder (BDD) is a prevalent and impairing mental disorder that typically onsets in adolescence. Cognitive-behavior therapy (CBT) may be effective for adolescent BDD, although the supporting evidence is currently limited. CBT for BDD is a highly specialized treatment, creating a considerable gap in access to care for young people. Therapist-guided Internet-delivered CBT (ICBT) may help bridge this gap. The primary aim of this study is to determine the efficacy of a therapist-guided ICBT program for children and adolescents with BDD versus an active comparator. Secondary aims are to examine the 6-month durability of the treatment effects and to evaluate its relative cost-effectiveness from multiple perspectives. This is a 3-site superiority randomized controlled trial including 154 young people (12–17 years) with BDD recruited throughout Sweden. Participants are randomized 1:1 to 12 weekly modules of either therapist-supported ICBT primarily based on exposure with response prevention or an active comparator consisting of therapist-supported Internet-delivered relaxation training. Data will be collected at baseline, mid-treatment, post-treatment, and 1 month (primary endpoint), 3 months, and 6 months post-treatment. The primary outcome is BDD symptom severity measured with the Yale-Brown Obsessive-Compulsive Scale Modified for Body Dysmorphic Disorder, Adolescent version. All study personnel who can be blinded to study aims/hypotheses and group allocation will be blinded. Assessors conducting post-treatment and follow-up assessments will be external to the research team and blinded to study aims/hypotheses and group allocation at all assessment points. Analyses will be conducted according to the intention-to-treat principle and will follow a pre-specified statistical and health economic analysis plan. Participant recruitment started on 22 February 2024 and is currently ongoing. Data analysis for the primary aim will commence after the last participant reaches the primary endpoint. ClinicalTrials.gov NCT06262412. Registered on 16 February 2024, https://clinicaltrials.gov/study/NCT06262412 .

Treatment response in pediatric social anxiety disorder (SAD) is highly variable, and symptoms may be maintained by maladaptive attention. A previous study found that youth with SAD scan a more restricted area of faces than healthy controls during emotion recognition, potentially limiting interpretation of social cues. The current study followed up on these results by examining whether restricted face scanning 1) predicts response to psychological treatment, and 2) changes with successful treatment. Youth with SAD (n = 59) were assessed prior to treatment with internet-delivered cognitive behavioral therapy (ICBT) or supportive therapy (ISUPPORT) and then again three months after treatment. Restricted scanning of faces predicted a smaller symptom reduction, independent of treatment arm. Scanpath distribution was moderately stable from T1 to T2 and did not change with treatment. Restricted scanning of faces may be a risk factor for sustained SAD symptoms after therapy. As the visual scanpath is a key aspect of human visual processing, inflexible scanning could potentially interfere with information processing. Implications for theories of attention in pediatric SAD are discussed.

Abstract Objectives: Trauma-focused cognitive behavioural therapy (TF-CBT) is the established first-line treatment for paediatric posttraumatic stress disorder (PTSD), but access to evidence-based care remains limited. This study aimed to evaluate the feasibility and acceptability of a therapist-guided, 12-week, internet-delivered TF-CBT (iTF-CBT) programme for adolescents with PTSD, and to explore preliminary changes in PTSD symptoms. Design: Single-group feasibility trial. Setting: Save the Children, Sweden. Participants: Twenty-two adolescents (13-17 years, 82% female) with primary PTSD. Interventions: A 12-week, therapist-guided, internet-delivered TF-CBT comprising eight modules and parallel caregiver modules with joint child-caregiver activities. Outcomes: Feasibility measures included recruitment pace, participant retention, treatment adherence (module completion), and therapist time. Acceptability was evaluated through satisfaction, credibility, negative effects, and reported adverse events. Preliminary treatment effects were evaluated as within-group changes in PTSD severity using independent evaluator-rated Clinician-Administered PTSD Scale (CAPS-CA-5) and the self-reported Child and Adolescent Trauma Screen 2 (CATS-2). Assessments occurred at baseline, during treatment, post-treatment, and at 1-month follow-up (primary endpoint). Results: Recruitment was completed after seven months of active enrolment. Retention and adherence were high, satisfaction and credibility ratings were favourable, and no intervention-related serious adverse events occurred. Clinically meaningful within-group improvements were observed at the primary endpoint, with large reductions on CAPS-CA-5 (Cohen's d = 1.27) and CATS-2 (Cohen's d = 1.51). Conclusions: Therapist-guided iTF-CBT for adolescents with PTSD was safe, feasible, acceptable, and associated with clinically meaningful symptom improvements. These findings support further evaluation in larger, controlled trials to determine efficacy, cost-effectiveness, and long-term outcomes. ### Competing Interest Statement ES is part owner of Scandinavian E-Health AB, outside the submitted work. DMC receives royalties for contributing articles to UpToDate, Inc, and is part-owner of Scandinavian E-health AB, outside the submitted work. All other authors report no other competing interests. ### Clinical Trial NCT06185244 ### Funding Statement This work was supported by FORTE grant number 2024-01915 and Save the Children Sweden. ### Author Declarations I confirm all relevant ethical guidelines have been followed, and any necessary IRB and/or ethics committee approvals have been obtained. Yes The details of the IRB/oversight body that provided approval or exemption for the research described are given below: This study was approved by the Swedish Ethical Review Authority (2023-06185-01). I confirm that all necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived, and that any patient/participant/sample identifiers included were not known to anyone (e.g., hospital staff, patients or participants themselves) outside the research group so cannot be used to identify individuals. Yes I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance). Yes I have followed all appropriate research reporting guidelines, such as any relevant EQUATOR Network research reporting checklist(s) and other pertinent material, if applicable. Yes The datasets generated and analysed during the current study are not publicly available due to Swedish and EU data protection regulations but are available from the corresponding author on reasonable request, provided that data sharing is compliant with applicable legal requirements.

Taboo obsessions are ego-dystonic, recurrent, and intrusive thoughts involving aggressive, sexual and/or religious themes, which are common in individuals with obsessive-compulsive disorder (OCD). These symptoms are often challenging to treat with traditional, exposure-based approaches. Our research group has developed and successfully piloted an Internet-delivered intervention based on the cognitive framework of taboo obsessions (ICT). The current randomized controlled trial evaluated the efficacy of I-CT compared to Internet-delivered general psychological support in reducing OCD symptom severity and associated impairments. A secondary aim was to investigate if the treatment effect was mediated by a reduction in negative appraisals, the proposed mechanism of change in cognitive therapy. Sixty-eight participants with a diagnosis of OCD and primary taboo obsessions were randomized to either I-CT or general psychological support for 8 weeks. The primary outcome was change on the clinician-rated Yale-Brown Obsessive-Compulsive Scale (Y-BOCS), administered by masked assessors at pre- and post-treatment. Participants in both groups had a significant reduction of OCD symptom severity but those randomized to I-CT had significantly better outcomes (between group bootstrapped d = 0.69, [95% CI, 0.22-1.17]). The proportion of participants classed as responders and remitters was also higher in the ICT group (odds ratio 2.33 and 1.77 respectively), though not significantly. A large portion of the treatment effect (55%) was mediated by change in negative appraisals. I-CT could be a promising treatment approach for individuals with taboo obsessions who do not wish, or are unable, to engage in, or do not respond to, exposurebased treatment for OCD.

Predictors for the pharmacological effect of ADHD medication in children and adolescents are lacking. This study examined clinically relevant factors in a large (N = 638) prospective cohort reflecting real-world evidence. Children and adolescents aged 6–17 diagnosed with ADHD were evaluated at baseline and three months following ADHD medication initiation. The outcome was measured as a reduction in total SNAP-IV (Swanson Nolan and Pelham teacher and parent rating scale) score at three months compared to baseline. Outcome groups were defined as Responders (≥ 40

Anxiety disorders are common in children and adolescents, but access to evidence-based treatment is limited. Most clinical guidelines recommend stratified care, where less complex patients are offered low intensity interventions and complex patients more intensive options. Stepped care, where all patients initially receive low-intensity treatment, has gained traction due to its potential cost-effectiveness. Research on care models for youth with anxiety disorders is very limited. In this pre-registered (NCT06016907) pilot randomized controlled trial (RCT), we examined the feasibility, acceptability, and safety of a trial comparing stepped and stratified care for youth with anxiety disorders. In stepped care, all began with internet-delivered CBT. In stratified care, complex cases (based on a baseline risk score incorporating symptom severity, co-existing disorders, functional impairment, and family conflict) started with in-person CBT. Non-responders in both groups were offered in-person CBT. Over six months, 51 youth with anxiety disorders were enrolled (mean age = 14.18 years, range = 9.25–17.50; 71

Excessive worry is common during adolescence and across psychiatric disorders. This study investigates whether: (1) internet-delivered cognitive behavioral therapy (ICBT) focused on exposure to uncertainty is effective in reducing excessive worry; (2) improvements in worry are associated with reductions in other psychiatric symptoms; and (3) changes in intolerance of uncertainty (IU) mediate worry outcomes. Adolescents (N = 62; aged 13-17 years) with excessive worry (≥30 total score on Penn State Worry Questionnaire for Children) were randomly allocated to 8 weeks of ICBT (n = 31) or a waitlist for ICBT (Waitlist, n = 31). Self-reported worry (primary outcome) was measured weekly for 12 weeks and controlled effects assessed at week 12 post-baseline. IU and a comparator mediator (depression) were measured every other week for 12 weeks during the treatment/waitlist phase. ICBT yielded significantly large reductions in worry compared to Waitlist (bootstrapped d = 0.59). Worry reductions mediated improvements in anxiety and depression symptoms. Changes in depression, but not IU, mediated worry outcomes. A brief course of worry-focused ICBT yielded moderate reductions in worry that was associated with improvements in anxiety and depression. Contrary to expectation, changes in IU did not explain worry reductions in this uncertainty- focused treatment. Further studies are needed to identify potential change mechanisms.

Introduction: The number of adolescents seeking professional help for depression is increasing and, despite advances in treatment, large unmet treatment needs remain. In the current protocol, we describe the design and methodology of a randomised controlled trial (RCT) to evaluate the clinical efficacy of two forms of internet-delivered behavioural activation (I-BA), with and without therapist support, in reducing depressive symptoms, compared with treatment as usual (TAU). Secondary objectives include examining the 12-month maintenance of the treatment effects and conducting a health economic evaluation of the interventions. Methods and analysis: In this single-blinded RCT, we aim to include 215 participants aged 13-17 years with mild to moderate depression who will be randomised (1:1:1 ratio) to 10 weeks of either therapist-guided or self-guided I-BA, or TAU provided by regular mental health clinics. Data will be collected at baseline, weekly for the initial 10 weeks, post-treatment and at 3 and 12-month follow-ups. The primary endpoint is the 3-month follow-up. The primary outcome is blinded clinician-rated severity of depressive symptoms, measured by the Children's Depression Rating Scale-Revised. Treatment response is defined as a score of 'Much improved' or 'Very much improved' on the Clinical Global Impression-Improvement Scale, administered at the primary endpoint. Outcome assessors will be blinded to treatment conditions at all assessment points. A health economic evaluation of I-BA will be performed, both in the short term (primary endpoint) and the long term (12-month follow-up). Ethics and dissemination: Ethical approval was obtained from the Swedish Ethical Review Authority in June 2021. The final participant was enrolled on 3 May 2024 and expected to reach the primary endpoint by November 2024. The results of this study will be disseminated through publication in peer-reviewed journals, presented at conferences and communicated to healthcare providers and the public.

Few studies have evaluated the implementation of ICBT in regular child and adolescent mental health services (CAMHS). This study aimed to explore the acceptability, feasibility, and effectiveness of ICBT for children and adolescents with anxiety disorders and obsessive-compulsive disorder (OCD) within a rural CAMHS. The study also explored outcome predictors and long-term outcomes.Eighty-three participants were consecutively recruited from a non-specialized CAMHS in Region Jämtland Härjedalen in northern Sweden. Therapist-guided ICBT was offered during 12 weeks to children aged 8–17 with an anxiety disorder or OCD. Acceptability and feasibility measures included treatment adherence, treatment satisfaction, and adverse events. The primary outcome measure was the Clinical Global Impression–Severity. Secondary measures of effectiveness included clinician-, self-, and parent-ratings of symptom severity and functional impairment. Assessments were completed at baseline, post-treatment, and three-month follow-up (primary endpoint). A two-year follow up was conducted using medical records. Potential predictors included both patient characteristics and treatment variables.Results indicated that ICBT was both acceptable and feasible according to study measures. Statistically significant improvements were found from baseline to the three-month follow-up on clinician rated severity (B [SE] = −0.92 [0.09]; p < .001), as well as on all secondary measures. Forty-three percent of participants no longer fulfilled criteria for their principal disorder at the three-month follow-up. No serious adverse events were reported. Clinical improvement was highest among children with higher functioning at baseline (B [SE] = −0.05 [0.02]; p < .05). Forty-six percent of participants had been in contact with CAMHS during the two-year follow-up period, mainly for reasons other than their initial diagnosis. Findings suggest that ICBT could be an acceptable and feasible treatment option for young people with anxiety disorders and OCD in rural non-specialized CAMHS settings. Further studies are needed to confirm treatment effectiveness in this setting. Trial registration: NCT02926365.

Importance:Behavior therapy is a recommended intervention for Tourette syndrome (TS) and chronic tic disorder (CTD), but availability is limited and long-term effects are uncertain. Objective:To investigate the long-term efficacy and cost-effectiveness of therapist-supported, internet-delivered exposure and response prevention (ERP) vs psychoeducation for youths with TS or CTD. Design, Setting, And Participants:This 12-month controlled follow-up of a parallel group, superiority randomized clinical trial was conducted at a research clinic in Stockholm, Sweden, with nationwide recruitment. In total, 221 participants aged 9 to 17 years with TS or CTD were enrolled between April 26, 2019, and April 9, 2021, of whom 208 (94%) provided 12-month follow-up data. Final follow-up data were collected on June 29, 2022. Outcome assessors were masked to treatment allocation throughout the study. Interventions:A total of 111 participants were originally randomly allocated to 10 weeks of therapist-supported, internet-delivered ERP and 110 participants to therapist-supported, internet-delivered psychoeducation. Main Outcomes And Measures:The primary outcome was within-group change in tic severity, measured by the Total Tic Severity Score of the Yale Global Tic Severity Scale (YGTSS-TTSS), from the 3-month follow-up to the 12-month follow-up. Treatment response was defined as 1 (very much improved) or 2 (much improved) on the Clinical Global Impression-Improvement scale. Analyses were intention-to-treat and followed the plan prespecified in the published study protocol. A health economic evaluation was performed from 3 perspectives: health care organization (including direct costs for treatment provided in the study), health care sector (additionally including health care resource use outside of the study), and societal (additionally including costs beyond health care [eg, parent's absenteeism from work]). Results:In total, 221 participants were recruited (mean [SD] age, 12.1 [2.3] years; 152 [69%] male). According to the YGTSS-TTSS, there were no statistically significant changes in tic severity from the 3-month to the 12-month follow-up in either group (ERP coefficient, -0.52 [95% CI, -1.26 to 0.21]; P = .16; psychoeducation coefficient, 0.00 [95% CI, -0.78 to 0.78]; P > .99). A secondary analysis including all assessment points (baseline to 12-month follow-up) showed no statistically significant between-group difference in tic severity from baseline to the 12-month follow-up (coefficient, -0.38 [95% CI, -1.11 to 0.35]; P = .30). Treatment response rates were similar in both groups (55% in ERP and 50% in psychoeducation; odds ratio, 1.25 [95% CI, 0.73-2.16]; P = .42) at the 12-month follow-up. The health economic evaluation showed that, from a health care sector perspective, ERP produced more quality-adjusted life years (0.01 [95% CI, -0.01 to 0.03]) and lower costs (adjusted mean difference -$84.48 [95% CI, -$440.20 to $977.60]) than psychoeducation at the 12-month follow-up. From the health care organization and societal perspectives, ERP produced more quality-adjusted life years at higher costs, with 65% to 78% probability of ERP being cost-effective compared with psychoeducation when using a willingness-to-pay threshold of US $79 000. Conclusions And Relevance:There were no statistically significant changes in tic severity from the 3-month through to the 12-month follow-up in either group. The ERP intervention was not superior to psychoeducation at any time point. While ERP was not superior to psychoeducation alone in reducing tic severity at the end of the follow-up period, ERP is recommended for clinical implementation due to its likely cost-effectiveness and support from previous literature. Trial Registration:ClinicalTrials.gov Identifier: NCT03916055.

BACKGROUND:Insomnia is common in adolescents. This study evaluated feasibility and preliminary efficacy of a six-week internet-delivered cognitive-behavioral therapy for insomnia (ICBT-I) in adolescents.METHODS:In this uncontrolled pilot study, participants (n = 27, 78% female) completed assessments pre- and post intervention. Data on recruitment, adherence to treatment, treatment activity, satisfaction and credibility was collected to assess feasibility. Self-reported insomnia symptoms, sleep parameters as well as depression, anxiety and daytime function were also assessed.RESULTS:Participants showed good adherence to treatment and found the intervention overall credible and satisfactory. From pre- to post-assessment, statistically significant improvements were found for insomnia symptoms (p < .001; d = 1.02), sleep onset latency (p < .001; d = .39), wake after sleep onset (p = .001; d = .34), sleep efficiency (p < .001; d = .5) and depression (p = .01, d = .37). Changes in scores of total sleep time, generalized anxiety, daytime sleepiness and functional disability were not significant.CONCLUSIONS:The present study indicates that ICBT-I is well accepted by adolescents, that insomnia symptoms and sleep parameters can improve following the intervention, and that co-morbid symptoms of depression can be reduced. Due to the limited sample size and the uncontrolled design, the suggested results need to be replicated in well-powered controlled clinical trials.

BackgroundEvidence for substance use-related problems in individuals with mild intellectual disability is sparse and mainly limited to selected psychiatric populations. We evaluated the risk of substance use-related problems in individuals with mild intellectual disability compared to the general population. Additionally, we have performed secondary sibling comparison analyses to account for familial confounding.MethodsWe conducted a population-based cohort study of individuals born in Sweden between 1973 and 2003. A total of 18,307 individuals with mild intellectual disability were compared to 915,350 reference individuals from the general population and 18,996 full siblings of individuals with mild intellectual disability. Information on mild intellectual disability and substance use-related problems was obtained from several Swedish national and regional school and healthcare registers. Substance use-related problems were measured via corresponding diagnostic and legal codes and included alcohol use disorder, drug use disorder, alcohol-related somatic disease, conviction for a substance-related crime, and substance-related death.ResultsIndividuals with mild intellectual disability had a higher risk of any substance use-related problem compared to the general population (HR, 1.81; 95% CI, 1.72-1.91), both in males (HR, 1.76; 95% CI, 1.65-1.89) and females (HR, 1.89; 95% CI, 1.74-2.05). The risks of substance use-related problems were particularly elevated among individuals with mild intellectual disability and psychiatric comorbidities (HR, 2.21-8.24). The associations were attenuated in the sibling comparison models.ConclusionsIndividuals with mild intellectual disability, especially those with psychiatric comorbidity, are at an elevated risk of substance use-related problems. Familial factors shared by full siblings contribute considerably to the association between mild intellectual disability and substance use-related problems.

Abstract Background Common clinical sense would suggest that individuals with milder obsessive-compulsive disorder (OCD) symptoms should be the most suitable for guided internet-delivered cognitive behaviour therapy (CBT), with more intensive forms of treatment reserved for more severe or complex cases. Results In this secondary data analysis of a non-inferiority clinical trial comparing internet-delivered CBT with in-person CBT for young people with OCD (N = 152), we found that higher baseline symptom severity predicted worse treatment outcomes in the in-person group but not the internet-delivered CBT group. Additional analyses showed that among individuals with milder symptoms, internet-delivered CBT was associated with worse outcomes than in-person CBT. Conclusions If replicated, these results would question the axiom that internet-delivered CBT is most suitable for milder cases. Trial registration The original trial was registered at ClinicalTrials.gov ID NCT03263546. Date of registration 2017–08–28.

Importance Behavior therapy is a recommended intervention for Tourette syndrome (TS) and chronic tic disorder (CTD), but availability is limited and long-term effects are uncertain. Objective To investigate the long-term efficacy and cost-effectiveness of therapist-supported, internet-delivered exposure and response prevention (ERP) vs psychoeducation for youths with TS or CTD. Design, Setting, And Participants This 12-month controlled follow-up of a parallel group, superiority randomized clinical trial was conducted at a research clinic in Stockholm, Sweden, with nationwide recruitment. In total, 221 participants aged 9 to 17 years with TS or CTD were enrolled between April 26, 2019, and April 9, 2021, of whom 208 (94%) provided 12-month follow-up data. Final follow-up data were collected on June 29, 2022. Outcome assessors were masked to treatment allocation throughout the study. Interventions A total of 111 participants were originally randomly allocated to 10 weeks of therapist-supported, internet-delivered ERP and 110 participants to therapist-supported, internet-delivered psychoeducation. Main Outcomes And Measures The primary outcome was within-group change in tic severity, measured by the Total Tic Severity Score of the Yale Global Tic Severity Scale (YGTSS-TTSS), from the 3-month follow-up to the 12-month follow-up. Treatment response was defined as 1 (very much improved) or 2 (much improved) on the Clinical Global Impression-Improvement scale. Analyses were intention-to-treat and followed the plan prespecified in the published study protocol. A health economic evaluation was performed from 3 perspectives: health care organization (including direct costs for treatment provided in the study), health care sector (additionally including health care resource use outside of the study), and societal (additionally including costs beyond health care [eg, parent's absenteeism from work]). Results In total, 221 participants were recruited (mean [SD] age, 12.1 [2.3] years; 152 [69%] male). According to the YGTSS-TTSS, there were no statistically significant changes in tic severity from the 3-month to the 12-month follow-up in either group (ERP coefficient, -0.52 [95% CI, -1.26 to 0.21]; P = .16; psychoeducation coefficient, 0.00 [95% CI, -0.78 to 0.78]; P > .99). A secondary analysis including all assessment points (baseline to 12-month follow-up) showed no statistically significant between-group difference in tic severity from baseline to the 12-month follow-up (coefficient, -0.38 [95% CI, -1.11 to 0.35]; P = .30). Treatment response rates were similar in both groups (55% in ERP and 50% in psychoeducation; odds ratio, 1.25 [95% CI, 0.73-2.16]; P = .42) at the 12-month follow-up. The health economic evaluation showed that, from a health care sector perspective, ERP produced more quality-adjusted life years (0.01 [95% CI, -0.01 to 0.03]) and lower costs (adjusted mean difference -$84.48 [95% CI, -$440.20 to $977.60]) than psychoeducation at the 12-month follow-up. From the health care organization and societal perspectives, ERP produced more quality-adjusted life years at higher costs, with 65% to 78% probability of ERP being cost-effective compared with psychoeducation when using a willingness-to-pay threshold of US $79 000. Conclusions And Relevance There were no statistically significant changes in tic severity from the 3-month through to the 12-month follow-up in either group. The ERP intervention was not superior to psychoeducation at any time point. While ERP was not superior to psychoeducation alone in reducing tic severity at the end of the follow-up period, ERP is recommended for clinical implementation due to its likely cost-effectiveness and support from previous literature.

Half of parents to infants and toddlers experience unwanted intrusive thoughts (UITs) about intentionally harming their child. For some, this can lead to impaired parental self-efficacy, elevated parental stress, and symptoms of depression. Many do not disclose their thoughts due to shame. Our research group has developed a self-guided online cognitive intervention for parents with distressing UITs of intentional child-related harm. A previous randomized pilot trial (N=43) showed that the intervention was more effective than waitlist in reducing distress related to UITs. It also improved parental self-efficacy. This study is an qualitative investigation of the participants’ experiences with the intervention. We conducted semi-structured interviews with 8 participants. A thematic analysis revealed two overarching themes: (1) Changed perception of the unwanted intrusive thoughts and (2) Different paths to recovery. The parents reported that the intervention taught skills to approach their UITs in a more flexible way, which had positive effects on well-being and parenting. The flexibility and anonymity of the online format was highlighted as positive. Some would have liked additional therapist support and better adaptations to a smartphone format. The findings provide additional qualitative data how an online self-guided intervention can help parents who struggle with UITs.

Body dysmorphic disorder (BDD) is a prevalent and impairing psychiatric condition that typically debuts in adolescence and is associated with risky behaviours. The disorder can be effectively treated with cognitive behaviour therapy (CBT). However, CBT for BDD is seldom available primarily due to a shortage of trained therapists. Internet-delivered CBT (ICBT) can be a way to increase treatment availability. The aim of this feasibility trial was to evaluate the feasibility, safety, and preliminary efficacy of a CBT protocol for adolescents with BDD, adapted to be delivered over the Internet with minimal therapist support. A total of 20 participants (12-17-year-olds) meeting criteria for BDD were recruited nationally to a specialist outpatient clinic in Stockholm, Sweden. One participant withdrew consent and their data could not be analysed. Nineteen participants were offered 12 modules of therapist-guided ICBT for BDD and were followed up to 12 months post-treatment. Preliminary efficacy was measured at the a priori primary endpoint (3-month follow-up) and at the 12-month follow-up with the clinician-rated Yale-Brown Obsessive Compulsive Scale Modified for BDD for Adolescents. The treatment was rated as both credible and satisfactory and was associated with a large and statistically significant reduction in BDD symptom severity (d = 2.94). The proportion of participants classified as responders at the primary endpoint was 73.7%, and the proportion of full or partial remitters was 63.2%. The average therapist support time was 8 min per participant per week. Treatment gains continued to accrue up to the 12-month follow-up. Two participants attempted suicide and another two reported non-suicidal self-injuries during the study period. ICBT with minimal therapist support is a feasible, potentially efficacious, and durable treatment for adolescents with BDD. Risky behaviours typical of this patient group should be carefully monitored during treatment.