Building capacity for rigorous controlled trials in autism: the importance of measuring treatment adherence

Adherence and Opportunity Frequency as Predictors of Communication Outcomes from Pivotal Response Parent Training

PURPOSE

Access to intervention is a barrier for children with autism. As parent-mediated interventions have emerged to address this need, understanding implementation components contributing to child gains is critically important. Existing literature documents relationships between parent treatment adherence and child progress; however, less is understood about components, such as frequency of learning opportunities, which could also affect child outcomes.

METHODS

This study is a secondary analysis of data from a randomized controlled trial evaluating Pivotal Response Treatment group parent training (PRTG) compared to psychoeducation. Linear regression and mediational models were employed to identify potential predictors and mediators of outcome.

RESULTS

PRTG produced large increases in adherence and learning opportunities. In general, greater frequency of learning opportunities and adherence predicted better child outcomes. The best-fitting cross-sectional mediational models indicated at least partial mediational effects, whereby increased learning opportunities mediated the relationship between greater adherence and improved child outcomes.

CONCLUSIONS

This study provides preliminary evidence of how early gains in adherence may support parents to provide more frequent learning opportunities, which, in turn, yield positive effects on child social communication. Future large-scale research, with greater granularity of measurement, is needed to further understand the temporal relationships between these variables.

World Health Organisation-Caregiver Skills Training (WHO-CST) Program: Feasibility of Delivery by Non-Specialist Providers in Real-world Urban Settings in India

The World Health Organization-Caregiver Skills Training Program, a parent-mediated early intervention facilitated by non-specialist providers piloted in urban India was evaluated using mixed-methods for feasibility and effects on child and caregiver outcomes. Caregivers (n = 22) of children (2-9 years) with social-communication delays participated in a single-group pre-post study. High rates of caregiver attendance, improved caregiver fidelity, and facilitator competency suggested program feasibility. Caregivers voiced acceptability of various intervention-components. The intervention was associated with improved caregiver-reported skills and knowledge (p < 0.00), reduction in stress (p = 0.03), improved child developmental outcomes on communication and social interaction (p < 0.00), and adaptive behaviors (p < 0.00). Challenges about logistics and availability of time were highlighted. Implications of results in resource-poor settings and recommendations for future feasibility trials are discussed.

Parent perceptions of participation in a parent-mediated communication-focussed intervention with their young child with autism spectrum disorder

Paediatric Autism Communication Therapy is a parent-mediated, video-aided, communication-focussed intervention for young children with autism spectrum disorder. It has been shown in a UK randomised controlled trial to lead to improvements in parent–child communication and family quality of life, together with a sustained reduction in child autism symptom severity. This qualitative study examined parental perceptions of their participation in Paediatric Autism Communication Therapy within the context of the randomised controlled trial. Semi-structured interviews were carried out with 18 parents within 12 months of completion of the therapy. The thematic analysis provides insights into parents’ hopes, expectations, and learning processes when working with Paediatric Autism Communication Therapy therapists and carrying out daily practice in the home. Parents reported positive changes in their interaction and relationship with their child and improvements to their child’s communication and interaction. Some also highlighted poignant realisations and emotional challenges associated with taking part in this post-diagnostic therapy. Practical difficulties were also emphasised. Implications for the clinical practice of parent-mediated interventions with young children with autism spectrum disorder are discussed.

Case-control study of the low intensive autism-specific early behavioral intervention A-FFIP: Outcome after one year

Abstracts: Objective: In current international research, early intervention in children with autism-spectrum disorder (ASD) focuses on naturalistic developmental behavioral interventions (NDBI). The manualized Frankfurt Early Intervention Program for preschool-aged children with ASD (A-FFIP) implements NDBI principles within a low-intensity approach of 2 h intervention/week. The present case-control study established effect sizes of change in autistic symptoms, comorbid behavioral problems as well as IQ after one year. Methodology: An intervention group (N = 20; age: 3.4-7.9 years) and a treatment-as-usual control group (N = 20; age: 3.2-7.3 years) of children with ASD were matched for developmental and chronological age. The outcome measures used were the ADOS severity score, the Child Behavior Checklist, and cognitive development. Results: After one year, the A-FFIP group showed a trend towards greater improvement in autistic symptoms (η2 = .087 [95 %-CI: .000-.159]) and significantly greater improvements in cognitive development (η2 = .206 [CI: .012-.252]) and global psychopathology (η2 = .144 [CI: .001-.205]) compared to the control group. Conclusion: The efficacy of A-FFIP should be established in a larger, sufficiently powered, randomized controlled study.

The impact of implementation support on the use of a social engagement intervention for children with autism in public schools

Several interventions have demonstrated efficacy in improving social outcomes for children with autism; however, few have been successfully implemented in schools. This study compared two implementation strategies to improve the use of a social engagement intervention for children with autism in public schools. In total, 31 children with autism in grades K-5 and 28 school personnel participated in a randomized controlled trial. Schools were randomized to (1) training in Remaking Recess, a social engagement intervention, or (2) training in Remaking Recess with implementation support. Linear regression with random effects was used to test the intervention effects on implementation fidelity and social outcomes (peer engagement, social network inclusion, and friendship nominations). In both groups, implementation fidelity improved after training but remained low. Children in the Remaking Recess with implementation support condition had significantly higher social network inclusion and received more friendship nominations than children in the Remaking Recess-only condition (p = 0.03). Children in both groups experienced reduced solitary engagement (p < 0.001) and increased joint engagement (p < 0.001). The results suggest that implementation supports may have an effect on outcomes above and beyond the intervention, and that further research is needed into the active intervention mechanisms.

Sustainability of an early detection program for autism spectrum disorder over the course of 8 years

The importance of early detection of autism spectrum disorder followed by early intervention is increasingly recognized. This quasi-experimental study evaluated the long-term effects of a program for the early detection of autism spectrum disorder (consisting of training of professionals and use of a referral protocol and screening instrument), to determine whether the positive effects on the age at referral were sustained after the program ended while controlling for overall changes in the number of referrals. Before, during, and after the program, the proportion of children referred before 3 years (versus 3–6 years) of age was calculated for children subsequently diagnosed with autism spectrum disorder (N = 513) or another, non-autism spectrum disorder, condition (N = 722). The odds of being referred before 3 years of age was higher in children with autism spectrum disorder than in children with another condition during the program than before (3.1, 95% confidence interval: 1.2–7.6) or after (1.7, 95% confidence interval: 1.0–3.0) the program but was not different before versus after the program. Thus, although the program led to earlier referral of children with autism spectrum disorder, after correction for other referrals, the effect was not sustained after the program ended. This study highlights the importance of continued investment in the early detection of autism spectrum disorder.

Impact of the Early Start Denver Model on the cognitive level of children with autism spectrum disorder: study protocol for a randomised controlled trial using a two-stage Zelen design

INTRODUCTION

Early intervention for autism spectrum disorder (ASD) in the European French-speaking countries is heterogeneous and poorly evaluated to date. Early intervention units applying the Early Start Denver Model (ESDM) for toddlers and young children with ASD have been created in France and Belgium to improve this situation. It is essential to evaluate this intervention for the political decision-making process regarding ASD interventions in European French-speaking countries. We will evaluate the effectiveness of 12 hours per week ESDM intervention on the cognitive level of children with ASD, over a 2-year period.

METHODS AND ANALYSIS

The study will be a multicentre, randomised controlled trial, using a two-stage Zelen design. Children aged 15-36 months, diagnosed with ASD and with a developmental quotient (DQ) of 30 or above on the Mullen Scale of Early Learning (MSEL) will be included. We will use a stratified minimisation randomisation at a ratio 1:2 in favour of the control group. The sample size required is 180 children (120 in the control and 60 in the intervention group). The experimental group will receive 12 hours per week ESDM by trained therapists 10 hours per week in the centre and 2 hours in the toddlers' natural environment (alternatively by the therapist and the parent). The control group will receive care available in the community. The primary outcome will be the change in cognitive level measured with the DQ of the MSEL scored at 2 years. Secondary outcomes will include change in autism symptoms, behavioural adaptation, communicative and productive language level, sensory profile and parents' quality of life. The primary analysis will use the intention-to-treat principle. An economic evaluation will be performed.

DISSEMINATION

Findings from the study will be disseminated through peer reviewed publications and meetings.

TRIAL REGISTRATION NUMBER

NCT02608333 (clinicaltrials.gov); Pre-results.

Child's verbal ability and gender are associated with age at diagnosis in a sample of young children with ASD in Europe

BACKGROUND

Autism spectrum disorder can in some cases be reliably diagnosed by age 2 years, but in community settings, the mean age at diagnosis is often considerably higher. Later diagnosis has been found to be associated with lower symptom severity, lower parental socioeconomic status and fewer parental concerns. Gender differences in age at diagnosis have been examined, with mixed evidence.

METHODS

We examined the association of child's verbal ability and gender, and parental education, with age at diagnosis in a large sample of young children with autism spectrum disorder in 18 European countries (n = 1410).

RESULTS

There was considerable variation in age at diagnosis across countries. Children with better communication skills were diagnosed significantly later than non-verbal and minimally verbal children. There was also a significant interaction of gender with verbal ability on age at diagnosis, in that female children with complex phrase speech were diagnosed later than male children with the same level of verbal ability.

CONCLUSIONS

Our findings highlight the need to implement public awareness initiatives and training for professionals to promote early detection and, consequently, early intervention for autism spectrum disorder in Europe.