LAY ABSTRACT: Nearly three out of four autistic people experience mental health problems such as stress, anxiety or depression. The research already done does not guide us on how best to prevent or treat mental health problems for autistic people. Our aim was to look at the benefits and harms of different interventions on mental health outcomes in autistic people. We searched all the published randomised controlled trials (RCTs) about interventions for mental health conditions in autistic people until 17 October 2020. We also searched for RCTs that were not published in peer-reviewed journals. These were obtained from registers of clinical trials online. We then combined the information from all these trials using advanced statistical methods to analyse how good the interventions are. Seventy-one studies (3630 participants) provided information for this research. The studies reported how participants were responding to the intervention for only a short period of time. The trials did not report which interventions worked for people with intellectual disability. In people without intellectual disability, some forms of cognitive behavioural therapy and mindfulness therapy may be helpful. However, further research is necessary. Many trials used medications to target core features of autism rather than targeting mental health conditions, but these medications did not help autistic people. Until we have more evidence, treatment of mental health conditions in autistic people should follow the evidence available for non-autistic people. We plan to widely disseminate the findings to healthcare professionals through medical journals and conferences and contact other groups representing autistic people.
CONTEXT: In several studies, authors have reported on cognitive behavioral therapy (CBT) for children and adolescents with autism spectrum disorders (ASDs), but inconsistent treatment effectiveness was revealed from these studies.
OBJECTIVE: To evaluate the effectiveness of CBT on the symptoms of ASD and social-emotional problems in children or adolescents with ASD by using a meta-analytic approach.
DATA SOURCES: Data sources included PubMed, Embase, and the Cochrane Library.
STUDY SELECTION: We selected randomized controlled trials (RCTs) in which authors reported effectiveness of CBT on the symptoms of ASD and social-emotional problems in children or adolescents with ASD from database inception to May 2019.
DATA EXTRACTION: For each study, 2 authors extracted data on the first author's surname, publication year, country, sample size, mean age, CBT target, intervention, outcome measurement, follow-up duration, and investigated outcomes.
RESULTS: Forty-five RCTs and 6 quasi RCTs of 2485 children and adolescents with ASDs were selected for the final meta-analysis. There was no significant difference between CBT and control for symptoms related to ASD based on self-reported outcomes (standard mean difference: -0.09; 95% confidence interval: -0.42 to 0.24; P = .593), whereas CBT significantly improved the symptoms related to ASD based on informant-reported outcomes, clinician-rated outcomes, and task-based outcomes. Moreover, the pooled standard mean differences indicated that CBT has no significant effect on symptoms of social-emotional problems based on self-reported outcomes.
LIMITATIONS: The quality of included studies was low to modest, significant heterogeneity among the included studies for all investigated outcomes was detected, and publication bias was inevitable.
CONCLUSIONS: These findings indicate that CBT may significantly improve the symptoms of ASD and social-emotional problems in children or adolescents with ASD.
BACKGROUND: Anxiety is common in youth on the autism spectrum and cognitive behavioural therapy (CBT) has been adapted to address associated symptoms. The aim of the current systematic review and meta-analysis was to examine the efficacy of CBT for reducing anxiety in autistic youth.
METHOD: Searches of PubMed and Scopus databases were undertaken from January 1990 until December 2020. Studies were included if they consisted of randomised controlled trials (RCTs) using CBT to reduce anxiety in autistic youth. Separate random effects meta-analyses assessed anxiety ratings according to informant (clinician; parent; child), both at end-of-trial and at follow-up.
RESULTS: A total of 19 RCTs met our inclusion criteria (833 participants: CBT N = 487; controls N = 346). Random effects meta-analyses revealed a large effect size for clinician rated symptoms (g = 0.88, 95% CI 0.55, 1.12, k = 11), while those for both parent (g = 0.40, 95% CI 0.24, 0.56; k = 18) and child-reported anxiety (g = 0.25, 95% CI 0.06, 0.43; k = 13) were smaller, but significant. These benefits were not however maintained at follow-up. Moderator analyses showed that CBT was more efficacious for younger children (for clinician and parent ratings) and when delivered as individual therapy (for clinician ratings). Using the Cochrane Risk of Bias 2 tool, we found concerns about reporting bias across most trials.
CONCLUSIONS: The efficacy of CBT for anxiety in autistic youth was supported in the immediate intervention period. However, substantial inconsistency emerged in the magnitude of benefit depending upon who was rating symptoms (clinician, parent or child). Follow-up analyses failed to reveal sustained benefits, though few studies have included this data. It will be important for future trials to address robustness of treatment gains overtime and to further explore inconsistency in efficacy by informant. We also recommend pre-registration of methods by trialists to address concerns with reporting bias.
PLAIN LANGUAGE SUMMARY: Cognitive behavioural therapy for anxiety in school-aged children with autism spectrum disorder can reduce anxiety Cognitive behavioural therapy interventions to reduce the level of anxiety in students with autism spectrum disorder are moderately effective. What is this review about? Anxiety is a common problem in school-aged children with autism spectrum disorder (ASD). Cognitive behavioural therapy (CBT) and other psychosocial interventions have been developed as alternatives to pharmacological intervention to treat anxiety in students with ASD. What is the aim of this review? This Campbell systematic review examines the effects of interventions for reducing anxiety in school-aged children with autism spectrum disorder, compared to treatment-as-usual. The review summarises evidence from 24 studies using an experimental or quasi-experimental design. What studies are included? Twenty-four studies, involving 931 school-aged children with ASD (without co-occurring intellectual disability) and clinical anxiety, are summarised in this review. The studies were experimental or quasi-experimental control-treatment trials, deemed to be of sufficient methodological quality and with reduced risk of bias. Studies spanned the period 2005 to 2018 and were mostly carried out in Australia, the UK and the USA. Examined interventions ranged across clinical, school-based, or home-based settings, with group or individual treatment formats. Twenty-two of the studies used a CBT intervention. One study used peer-mediated theatre therapy and one study examined the benefits of Thai traditional massage for reducing anxiety. Most interventions involved parents/caregivers and were conducted face-to-face. What are the main findings of this review? Overall, the effects of interventions on anxiety show a statistically significant moderate to high effect, compared to waitlist and treatment-as-usual control conditions at post-treatment. However, effects differ depending on who reports on the student’s anxiety. Clinician reports indicate a very high statistically significant effect, parent reports indicate a high significant effect, and self-reports indicate only a moderate significant effect on the reduction of anxiety in students with ASD. There are larger effects for treatments that involve parents than for student-only interventions. Effects are also larger for individual one-on-one interventions compared to treatments delivered in a group with peers. There are several risk-of-bias issues in most studies included in the review, mainly due to the unavoidable limitation that participants cannot be blinded to the treatment group, which may upwardly bias the estimated effects. There are also limitations in the description of randomisation in a third of the studies, so findings should be treated with caution. What do the findings of this review mean? The findings provide evidence in support of interventions, particularly CBTs, designed to reduce anxiety symptoms in school-aged children with ASD. These findings accord with and build upon the findings of previous systematic reviews into the effectiveness of interventions to reduce anxiety in children and youth with ASD. However, because of the risk of bias in current findings, it would be useful to have further studies with larger sample sizes and to reduce potential biases where possible. How up-to-date is this review? The review authors searched for studies up to the end of 2018.
Nearly three out of four autistic people experience mental health problems such as stress, anxiety or depression. The research already done does not guide us on how best to prevent or treat mental health problems for autistic people. Our aim was to look at the benefits and harms of different interventions on mental health outcomes in autistic people. We searched all the published randomised controlled trials (RCTs) about interventions for mental health conditions in autistic people until 17 October 2020. We also searched for RCTs that were not published in peer-reviewed journals. These were obtained from registers of clinical trials online. We then combined the information from all these trials using advanced statistical methods to analyse how good the interventions are. Seventy-one studies (3630 participants) provided information for this research. The studies reported how participants were responding to the intervention for only a short period of time. The trials did not report which interventions worked for people with intellectual disability. In people without intellectual disability, some forms of cognitive behavioural therapy and mindfulness therapy may be helpful. However, further research is necessary. Many trials used medications to target core features of autism rather than targeting mental health conditions, but these medications did not help autistic people. Until we have more evidence, treatment of mental health conditions in autistic people should follow the evidence available for non-autistic people. We plan to widely disseminate the findings to healthcare professionals through medical journals and conferences and contact other groups representing autistic people.
