Improving Efficiency and Quality of the Children's ASD Diagnostic Pathway: Lessons Learned from Practice

A national research survey of childhood autism assessment services in the UK: empirical evidence of diagnostic practice, challenges and improvement opportunities

BACKGROUND

The UK National Health Service (NHS) Long Term Plan aims to reduce waiting times for childhood autism diagnostic assessment and improve parent and child satisfaction. This empirical research investigated current childhood diagnostic practice provision, and changes made by teams to address challenges faced.

METHODS

Data were collected using an online semi-structured research questionnaire. UK childhood autism diagnostic assessment services (for children aged 1-18 years) were invited to participate through multidisciplinary clinical networks, special interest groups and professionals mailing lists. The study was on the National Institute for Health Research Clinical Research Network portfolio.

RESULTS

128 clinicians from diverse NHS services responded including: 10 (8%) integrated services, 46 (36%) Child and Adolescent Mental Health Services (CAMHS) and 72 (56%) paediatric services. A minority of services (23, 17.9%) reported always meeting the National Institute for Health and Care Excellence guidance for assessment. Referrals rose 115% between 2015 and 2019. Clinicians described increased child and family complexity compared with previously; children had more co-occurring physical, mental health and neurodevelopmental conditions and there were more frequent family health problems and safeguarding concerns. Most services (97, 75.8%) reported recent funding stayed constant/decreased. Incomplete multidisciplinary teams (MDTs) were frequently reported; a minority of services reported increased availability of professionals, and some experienced reductions in key professionals. Many teams were unable to undertake assessments or make recommendations for associated neurodevelopmental and co-existing conditions. Teams described improvement strategies implemented (eg, adapting professionals' roles, supporting parents).

CONCLUSIONS

Most UK autism paediatric and CAMHS diagnostic teams experience significant challenges affecting the assessment of children with possible autism, and recommendations regarding treatment/intervention. Where CAMHS or paediatric services work in isolation, there are often competency gaps in MDTs and ability to deliver full neurodevelopmental and mental health assessments. Teams identified service improvement strategies; however, investment in MDT expertise is required to enable services to implement changes to meet the needs of children and families.

'We wait and we wait'-caregiver perspectives on autism spectrum disorder services in the Western Cape Province of South Africa

INTRODUCTION

Caregivers of children with autism face significant challenges in navigating health, education and other systems of care to ensure appropriate services for their children. In South Africa, for example, many children with autism are reported to be out of schools and waiting long periods for specialist school placements thus adding to the burden of care for caregivers and raising many questions about equity, diversity and inclusion.

METHODS

Here we performed a qualitative study using focus groups to collect data on the perspectives of caregivers of children with autism waiting for school placement in the Western Cape Province of South Africa. We asked families about their experiences of current autism services and for suggestions to improve service delivery.

RESULTS

The main theme that emerged was 'We wait and we wait'. Caregivers expressed high levels of frustration with existing autism educational and other services. Perspectives about services were captured under three categories. The first category, 'The costs of waiting' describes the socioemotional, financial and time costs associated with having a child with autism wait for educational services. The second category 'Barriers while waiting' describes the attitudinal, structural, process and communication barriers experienced by caregivers while seeking services for their children. The final category 'Expecting action' describes attitudinal, service and policy expectations that caregivers felt could improve service delivery. Caregivers provided 10 recommendations for autism service improvements.

CONCLUSION

Caregivers of children with autism waiting for educational services in the Western Cape Province of South Africa expressed dissatisfaction with existing services. Efforts to find solutions to providing services and support to children with autism waiting for educational services and their caregivers should be prioritized.

Profiles of Autistic Youth with and Without Co-occurring Behavioral Health and Neurodevelopmental Disorders: A Latent Class Analysis

OBJECTIVE

Autism spectrum disorder (ASD) diagnosis relies on clinical observation and documentation, but the presence of comorbidities can affect diagnostic validity across clinicians and exacerbate access to timely care. This study used latent class analysis to optimize subgroup identification based on functional level and associated comorbidities using the Behavior Assessment System for Children, Third Edition (BASC-3), and Vineland Adaptive Behavior Scales, Third Edition (Vineland-3), in a pediatric population referred for autism evaluation.

METHODS

This retrospective study reviewed clinical data extracted over a 3-year period (2018-2021). A latent class analysis was used to explore the presence of latent groups guided by the likelihood ratio test and fit indices. Additional analyses contrasted ASD and non-ASD groups on the BASC-3 and Vineland-3 variables.

RESULTS

There were 191 included participants (mean age 65.9 months, 76.4% male), of whom over half (60.7%) had an ASD diagnosis. Using 185 cases, the exploratory latent class analysis showed the emergence of 4 distinct subgroups. Composition of classes varied on ASD diagnosis, neurodevelopmental difficulties, behavioral health concerns, and intellectual disability. When contrasting ASD and non-ASD groups, significant between-group differences were observed across Vineland-3 variables and BASC-3 adaptive skills subscales indicating poorer social and adaptive functioning.

CONCLUSION

Latent class analysis of commonly used behavioral and adaptive measures can help distinguish between subgroups of pediatric patients referred for ASD evaluations and assist in triage of cases based on severity.

Expert Clinician Certainty in Diagnosing Autism Spectrum Disorder in 16-30-Month-Olds: A Multi-site Trial Secondary Analysis

Differential diagnosis of young children with suspected autism spectrum disorder (ASD) is challenging, and clinician uncertainty about a child's diagnosis may contribute to misdiagnosis and subsequent delays in access to early treatment. The current study was designed to replicate and expand a recent report in this Journal (McDonnell et al. in J Autism Dev Disord 49:1391-1401, https://doi.org/10.1080/15374416.2020.1823850 , 2019), in which only 60% of diagnoses were made with complete certainty by clinicians evaluating 478 toddlers and preschool children referred for possible ASD to specialized clinics. In this study, secondary analyses were performed on diagnostic, demographic and clinical data for 496 16-30-month-old children who were consecutive referrals to a 6-site clinical trial executed by specialized centers with experienced clinicians following best-practice procedures for the diagnosis of ASD. Overall, 70.2% of diagnoses were made with complete certainty. The most important factor associated with clinician uncertainty was mid-level autism-related symptomatology. Mid-level verbal age equivalents were also associated with clinician uncertainty, but measures of symptomatology were stronger predictors. None of the socio-demographic variables, including sex of the child, was significantly associated with clinician certainty. Close to one third of early diagnoses of ASD are made with a degree of uncertainty. The delineation of specific ranges on the ADOS-2 most likely to result in clinician uncertainty identified in this study may provide an opportunity to reduce random subjectivity in diagnostic decision-making via calibration of young-child diagnostic thresholds based on later-age longitudinal diagnostic outcome data, and via standardization of decision-making in regard to clinical scenarios frequently encountered by clinicians.

Obtaining a First Diagnosis of Autism Spectrum Disorder: Descriptions of the Diagnostic Process and Correlates of Parent Satisfaction from a National Sample

Obtaining an autism spectrum disorder (ASD) diagnosis is often challenging for parents. The purpose of this study was to better understand this process and examine how elements of the process may influence parent satisfaction. A total of 406 parents of autistic children participated. Participants were administered a survey covering the ASD diagnostic process. Parents had developmental concerns early but experienced long wait times and usually attended many appointments. Mean diagnostic age was 3.26 years and overall delay was 1.20 years. Stress and being told there was "no problem" were significantly associated with parental satisfaction with the process. Findings provide insight into challenges experienced by families of autistic children and can help pinpoint areas where the diagnostic process may be improved.

Barriers and facilitators to accessibility, continuity, validity, flexibility, and provider-family relationship along the diagnostic pathway in developmental disabilities

BACKGROUND

Parents of children with developmental disabilities must navigate a complex network to obtain a diagnosis and interventions for their child. However, their subjective experience of this journey has yet to be analyzed through the lens of a theorical framework that could support research, organizational program evaluation, and facilitate providers' reflection on how to enhance families' diagnostic services trajectory.

AIMS

This study sought to examine the diagnostic journey as experienced by 77 parents whose children were recently diagnosed with developmental disabilities (e.g., autism, intellectual disability) in the metropolitan area of Montréal, Québec (Canada).

METHODS AND PROCEDURES

A mixed qualitative content analysis approach was used to describe their perspective on barriers and facilitators in reference to the five dimensions of the Evaluation of the Trajectory Autism for Parents (ETAP) model (Rivard et al., 2020): accessibility, continuity, validity, flexibility, and provider-family relationship.

OUTCOMES AND RESULTS

The barriers and facilitators related to systemic factors identified by parents were consistent with the five dimensions outlined by the ETAP model. However, beyond these characteristics of the service delivery system, parents additionally identified their own, personal facilitators CONCLUSIONS AND IMPLICATIONS: This study supports the relevance of the ETAP framework to understanding the experience of families seeking a diagnosis. It also reinforces the potential contributions of this model to organize extant and future research as well as structure program evaluation and improvements.

An observational study of individual child journeys through autism diagnostic pathways, and associated costs, in the UK National Health Service

Background

Demand for diagnostic assessment in children with possible autism has recently increased significantly. Services are under pressure to deliver timely and high-quality diagnosis, following National Institute and Care Excellence multidisciplinary assessment guidelines. This UK National Health Service study aimed to answer: how many hours of health professional time are required to deliver autism diagnostic assessment, and how much does this cost?.

Method

Case notes of 20 children (1-16 yrs.) from 27 NHS trusts, assessed through an autism diagnostic pathway in the previous year, were examined retrospectively. Data included: hours of professional time, diagnostic outcome. Assessment costs calculated using standardised NHS tariffs.

Results

488 children (aged 21-195 months, mean 82.9 months, SD 39.36) from 22 Child Development Services (CDS), four Child and Adolescent Mental Health Services (CAMHS) and one tertiary centre; 87% were either under 5 (36%) or 5 to 11 years (51%). Children seen by CDS were younger than CAMHS (mean (SD) 6.10 (2.72) vs. 10.39 (2.97) years, p < 0.001). Mean days to diagnosis were 375 (SD 235), with large variation (range 41-1553 days). Mean hours of professional time per child was 11.50 (SD 7.03) and varied substantially between services and individuals. Mean cost of assessment was £846.00 (SD 536.31). 339 (70.0%) children received autism diagnosis with or without comorbidity; 54 (11%) received no neurodevelopmental diagnosis; 91 (19%) received alternative neurodevelopmental diagnoses. Children with one or more coexisting conditions took longer to diagnose, and assessment was more costly, on average 117 days longer, costing £180 more than a child with no neurodevelopmental diagnosis. Age did not predict days to diagnosis or assessment costs.

Conclusion

Typical assessment took 11 h of professional time and over 12-months to complete, costing GB£850 per child. Variation between centres and children reflect differences in practice and complexity of diagnostic presentation. These results give information to those delivering/planning autism assessments using multi-disciplinary team approach, in publicly funded health systems. Planning of future diagnostic services needs to consider growing demand, the need for streamlining, enabling context appropriate services, and child/family complexity.

Building Bricks of Integrated Care Pathway for Autism Spectrum Disorder: A Systematic Review

An integrated plan within a defined care pathway for the diagnosis, continuative interventions, and periodic redefinition of care of autistic people is essential for better outcomes. Challenges include delivering services across all domains or life stages and effective coordination between health/social care providers and services. Further, in the ‘real world’, service provision varies greatly, and in many settings is significantly weighted towards diagnosis and children’s services rather than treatment and support or adult care. This study aims to identify existing care pathways for Autism Spectrum Disorder (ASD) from referral to care management after diagnosis. The study reviewed the international literature in PubMed and PsycInfo databases and collected information on care for autistic individuals from the Autism Spectrum Disorders in Europe (ASDEU) project partners. The study found that published data mainly focused on specific components of care pathways rather than an integrated and coordinated plan of care and legislative indications. They should be aimed at facilitating access to the services for support and the inclusiveness of autistic individuals. Given the need for care addressing the complex and heterogeneous nature of ASD, effective coordination between different health/social care providers and services is essential. It is also suggested that research priority should be given to the identification of an integrated care pathway ‘model’ centered around case management, individualization, facilitation, support, continuous training and updating, and quality management.

Piloting a Home Visual Support Intervention with Families of Autistic Children and Children with Related Needs Aged 0-12

Visual supports are an important intervention for autistic individuals and others with neurodevelopmental differences. However, families often report limited access to visual supports and lack of information and confidence in their use at home. This pilot study aimed to evaluate the feasibility and effectiveness of a home-based visual supports intervention.

METHODS

29 families with children (n = 20 males; mean age 6.59 years [Range 3.64-12.21 years SD 2.57]) receiving support for autism or related needs participated in the study. Parents engaged in an individualised assessment and intervention process through home visits, completing pre- and post-measures. Qualitative methods were used to explore the parents' experiences of the intervention.

RESULTS

The intervention led to a statistically significant improvement in parent-reported quality of life (t28 = 3.09, p = 0.005) and parent-reported perception of autism-specific difficulties (t28 = 2.99, p = 0.006). Parents also reported improved access to resources and relevant information and increased confidence in using visual supports at home. The home visit model was strongly supported by the parents.

CONCLUSION

The results provide initial evidence of the acceptability, practicality, and utility of the home-based visual supports intervention. These findings suggest that outreach into the family home may be a beneficial mechanism for delivering interventions related to visual supports. This study highlights the potential of home-based interventions to improve access to resources and information for families and the importance of visual supports in the home setting.

Service redesign interventions to reduce waiting time for paediatric rehabilitation and therapy services: A systematic review of the literature

Despite well-documented benefits of rehabilitation and therapy services for children with disabilities, long waiting lists to access these services are common. There is a growing body of evidence, primarily from mixed or adult services, demonstrating that waiting times can be reduced through strategies that target wasteful processes and support services to keep up with demand. However, providers of rehabilitation and therapy services for children face additional complexities related to the long-term nature of many developmental conditions and the need to consider timing of interventions with developmental milestones and education transition points. This review aimed to synthesise available evidence on service redesign strategies in reducing waiting time for paediatric therapy services. We conducted a systematic review of studies conducted in outpatient paediatric rehabilitation or therapy settings, including physical and mental health services, evaluating a service redesign intervention and presenting comparative data on time to access care. Two reviewers independently applied inclusion criteria, assessed risk of bias and extracted data. Findings were analysed descriptively and the certainty of evidence was synthesised according to criteria for health service research. From 1934 studies identified, 33 met the criteria for inclusion. Interventions were categorised as rapid response strategies, process efficiency interventions or substitution strategies (using alternative providers in place of medical specialists). Reductions in waiting time were reported in 30 studies. Evidence is limited by study designs with high risk of bias, but this is mitigated by consistency of findings and large effect sizes. There is moderate-certainty evidence that service redesign strategies similar to those used in adult populations can be applied in paediatric rehabilitation and therapy settings to reduce waiting time.

Implications of Universal Autism Screening: Perspectives From Culturally Diverse Families With False-Positive Screens

OBJECTIVE

The American Academy of Pediatrics (AAP) recommends that pediatricians screen all young children for autism spectrum disorder (ASD). However, the US Preventive Services Task Force stated that there is insufficient evidence about the potential harms and benefits of universal ASD screening. To address this gap, we conducted qualitative interviews with caregivers of children who received a false-positive ASD screen to learn about families' perceptions of the harms and benefits of universal ASD screening.

METHODS

Culturally diverse caregivers (N = 26) of children with false-positive ASD screens completed qualitative interviews focused on parents' experiences with and recommendations to improve the ASD screening and evaluation process. Interviews were transcribed verbatim, coded, and analyzed using applied thematic analysis.

RESULTS

Parents explained that the ASD screening and evaluation process increased their knowledge about child development and substantiated existing concerns. The ASD screening and evaluation process resulted in connecting their child to services, which parents felt led to improvements in their child's delays. Parents endorsed anxiety during wait times for the formal developmental assessment. However, all parents expressed that, if given the option, they would repeat the screening and evaluation process again. Caregivers recommended universal screening for ASD and suggested that screening extend beyond the pediatrician to other settings.

CONCLUSIONS

From parents' perspectives, the connection to developmental services and increased knowledge of child development that resulted from the false-positive ASD screen outweighed the time-limited emotional distress triggered by a positive ASD screen. Overall, parents' preferences for universal ASD screening align with the AAP's recommendations.

Realist evaluation of Autism ServiCe Delivery (RE-ASCeD): which diagnostic pathways work best, for whom and in what context? Findings from a rapid realist review

OBJECTIVES

Waiting times in the UK for an autism diagnostic assessment have increased rapidly in the last 5 years. This review explored research (including 'grey' literature) to uncover the current evidence base about autism diagnostic pathways and what works best, for whom and in what circumstances, to deliver high quality and timely diagnosis.

DESIGN

We performed a Rapid Realist Review consistent with recognised standards for realist syntheses. We collected 129 grey literature and policy/guidelines and 220 articles from seven databases (January 2011-December 2019). We developed programme theories of how, why and in what contexts an intervention worked, based on cross comparison and synthesis of evidence. The focus was on identifying factors that contributed to a clearly defined intervention (the diagnostic pathway), associated with specific outcomes (high quality and timely), within specific parameters (Autism diagnostic services in Paediatric and Child & Adolescent Mental Health services in the UK). Our Expert Stakeholder Group, including representatives from local parent forums, national advocacy groups and clinicians, was integral to the process.

RESULTS

Based on 45 relevant articles, we identified 7 programme theories that were integral to the process of diagnostic service delivery. Four were related to the clinical pathway: initial recognition of possible autism; referral and triaging; diagnostic model; and providing feedback to parents. Three programme theories were pertinent to all stages of the referral and diagnostic process: working in partnership with families; interagency working; and training, service evaluation and development.

CONCLUSIONS

This theory informed review of childhood autism diagnostic pathways identified important aspects that may contribute to efficient, high quality and family-friendly service delivery. The programme theories will be further tested through a national survey of current practice and in-depth longitudinal case studies of exemplar services.

TRIAL REGISTRATION NUMBER

NCT04422483.

Development of a Pathway for Multidisciplinary Neurodevelopmental Assessment and Diagnosis in Children and Young People

There is a variable standard of access to quality neurodevelopmental assessment and diagnosis. People may have negative experiences, encountering lengthy waiting times, and inconsistent practices. Practitioners need guidance on standards and practices for assessment and diagnosis matched to new ways of working. In this paper, we present a new pathway and recommendations for multidisciplinary neurodevelopmental assessment and diagnosis for children and young people (<19 years), developed by the Scottish Government funded National Autism Implementation Team (NAIT). Our research used the Medical Research Council guidance for the development of complex interventions and included several iterative stages. Stage 1: n = 44 stakeholders attended an event on developing new practices for diagnosis and assessment. Stage 2: a literature synthesis was completed by the research team of clinical guidelines and diagnosis and assessment tools. Stage 3: an event with n = 127 stakeholders included discussion and debate of the data from stages 1 and 2. Recommendations and a draft pathway were written. Stage 4: successive drafts of recommendations and the pathway documentation were circulated among an advisory group, including multidisciplinary clinical experts and people with lived experience, until the final pathway was agreed upon. The finalised pathway includes guidance on terminology, assessment, diagnosis, triage, time standards and engagement of people with lived experience. The new pathway has been adopted by the Scottish Government. The pathway and associated documentation are freely available online for use by others.

Primary Care Provider and Child Characteristics Associated with Age of Diagnosis of Autism Spectrum Disorder: A Population-Based Cohort Study

In a cohort of kindergarten children in Ontario, Canada with Autism Spectrum Disorder (ASD) (n = 1522), we tested the association of age at ASD diagnosis and characteristics of (1) the child's primary care provider and, (2) the child using health administrative databases. We tested the association of primary care practice model and time from developmental delay identification to age at ASD diagnosis. Older age of diagnosis was associated with provider foreign training (vs. domestic) (adjusted Hazard Ratio [aHR] 1.17, 95% CI 1.03, 1.33) but not sex, care model, and years of practice. After developmental delay identification, children with paediatricians had longer time to diagnosis than children with providers in care models (aHR 0.68, 95% CI 0.54, 0.86). Findings can be used to inform primary care provider ASD training.

Detection of Early Warning Signs in Autism Spectrum Disorders: A Systematic Review

Due to the exponential increase of autism spectrum disorders’ prevalence in Western countries, it is necessary to improve early detection and intervention to enhance developmental milestones. This systematic review identified the most effective screening instrument, which can be used at an early age and which identifies the maximum number of autism cases. We identified several instruments with adequate predictive properties—the Autism Parent Screen for Infants (APSI), Battelle Development Inventory, second edition (BDI-2); Brief Infant-Toddler Social and Emotional Assessment (BITSEA); First Year Inventory (FYI); Infant-Toddler Checklist/Communication and Symbolic Behavior Scales Developmental Profile (ITC/CSBS-DP); Program of Research and Studies on AUTISM (PREAUT-Grid); Checklist for Early Signs of Developmental Disorders (CESDD); Social Attention and Communication Study (SACS); and the Screening Tool for Autism in Toddlers and Young Children (STAT)—that can be applied from 12 months of age in Western countries. The ITC/CSBS-DP has been proposed for universal screening from 12 months of age onwards, complemented by the Modified Checklist for Autism in Toddlers, Revised/Revised with Follow-Up (M-CHAT-R/F), which can be used from 15 months of age onwards. This strategy could improve early detection in at-risk children within the current health system, thus allowing for early intervention.

Preliminary Assessment of a Novel Continuum-of-Care Model for Young People With Autism Spectrum Disorders

Because of limited intermediate-care services, patients with autism spectrum disorders (ASDs) are increasingly being treated in emergency departments (EDs) and psychiatric hospitals. To address this growing problem, the authors developed a mobile outreach program, called Access to Psychiatry through Intermediate Care (APIC), for young (≤26 years) patients with ASD at risk for involvement with emergency medical services or the legal system. In its initial year, the average program duration per patient was 264.5 days. Clinical and Family Distress Scale scores indicated significant improvements for participating patients and caretakers. In the first year, among 40 patients with sufficient data for comparison, 13 (33%) went to the ED, and lengths of stay decreased up to 77% from pre- to postintervention. Given a cost per APIC-enrolled patient of $1,700, the net saving for the cost of ED treatment was $2,260-$2,559 per patient. The feasibility and cost-effectiveness of the APIC model has attracted additional state and county funding.

Referral, Assessment and Use of Screening Measures Related to Autism Spectrum Disorder at a Tertiary Hospital Setting

Children with developmental concerns in Australia continue to experience inequitable healthcare and service-related delays, even when diagnostic risk is identified. This study sought to explore service and demographic pathway factors leading up to autism spectrum disorder (ASD) assessment, including value of screening measures applied at triage. Following a trial of centralised intake for referred young children with suspected ASD, observational, retrospective pathway data was explored using bivariate and regression analyses. The mean age of 159 children referred with autism symptoms was 3.6 years, and 64% were diagnosed with ASD. Service allocation was associated with diagnosis, whilst screening tool results were not. Improved pathways are needed to limit wasted waiting times and direct each child to needs-based services.

Development of the Signposting Questionnaire for Autism (SQ-A): measurement comparison with the 10-item Autism Spectrum Quotient-Child and the Strengths and Difficulties Questionnaire in the UK and Latvia

Background

Recognising the signs of autism spectrum disorder (ASD) can be a challenge for frontline professionals. The use of brief parent-completed questionnaires for recording the signs of ASD in school-aged children may be an important and efficient contributor to professional insight. However, to date, such questionnaires have not been designed to be used in coordination with current standardised Diagnostic and Statistical Manual of Mental Disorders (DSM-5) diagnostic tools. Furthermore, the measurement characteristics of such questionnaires have been unexplored across countries that differ in levels of national autism service provision and cultural interpretation of the signs of ASD.

Methods

A new 14-item questionnaire (Signposting Questionnaire for Autism (SQ-A)) was developed using published DSM-5 items from a clinical interview, the Diagnostic Interview for Social Communication Disorders (DISCO). Measurement comparison was tested with the Short Autism Spectrum Quotient-Child (AQ-10) and the Strengths and Difficulties Questionnaire (SDQ). Parents of 4–11-year-old children in the UK (N = 200) and Latvia (N = 104) completed all three questionnaires. Information on clinical diagnosis provided by parents led to classification into three groups: ASD diagnosis, other conditions and no conditions. In the UK, a subsample of teachers also provided cross-informant reliability.

Results

In both countries, there was evidence of acceptable to good internal consistency for the SQ-A, with significantly higher scores for the ASD group and evidence of convergent and discriminant validity. There was also good parent-teacher reliability for the three measures. Notably, the questionnaires designed specifically to measure autism (SQ-A, AQ-10) performed more similarly to one another compared to the broader SDQ, with differences found for the ASD group. The overall pattern of responding to the three questionnaires was highly similar between countries.

Conclusions

These results indicate the potential of the 14-item SQ-A to guide frontline professionals in the recognition of the signs of autism in children, facilitating the provision of appropriate support.

Realist Evaluation of Autism ServiCe Delivery (RE-ASCeD): which diagnostic pathways work best, for whom and in what context? Protocol for a rapid realist review

INTRODUCTION

The National Health Service (NHS) Long-Term Plan (2019) acknowledges that children and young people with suspected autism wait too long for diagnostic assessment and sets out to reduce waiting times. However, diagnostic pathways vary with limited evidence on what model works best, for whom and in what circumstances. The National Autism Plan for Children (2003) recommended that assessment should be completed within 13 weeks but referral to diagnosis can take as long as 799 days.This Rapid Realist Review (RRR) is the first work package in a national programme of research: a Realist Evaluation of Autism ServiCe Delivery (RE-ASCeD). We explore how particular approaches may deliver high-quality and timely autism diagnostic services for children with possible autism; high quality is defined as compliant with National Institute for Heath and Care Excellence (2011) guidelines, and timely as a pathway lasting no more than one calendar year, based on previous work.

METHODS AND ANALYSIS

RRR is a well-established approach to synthesising evidence within a compressed timeframe to identify models of service delivery leading to desired outcomes. RRR works backwards from intended outcomes, identified by NICE guidelines and the NHS England Long-Term Plan. The focus is a clearly defined intervention (the diagnostic pathway), associated with specific outcomes (high quality and timely), within a particular set of parameters (Autism and Child & Adolescent Mental Health services in the UK). Our Expert Stakeholder Group consists of policymakers, content experts and knowledge users with a wide range of experience to supplement, tailor and expedite the process. The RRR is consistent with Realist And Meta-narrative Evidence Syntheses: Evolving Standards (RAMESES) and includes identifying the research question, searching for information, quality appraisal, data extraction, synthesising the evidence, validation of findings with experts and dissemination.

ETHICS AND DISSEMINATION

Ethical approval not required. Findings will inform the wider RE-ASCeD evaluation and be reported to NHS England.

TRIAL REGISTRATION NUMBER

NCT04422483. This protocol relates to Pre-results.

Interdisciplinary assessment

Interdisciplinary assessment (IA) is defined as the integration of clinical contributions by healthcare professionals from distinct disciplines into a comprehensive diagnostic and prognostic evaluation. This process requires the professionals to independently and simultaneously consider and gage clinical information collected via a variety of methods and from a variety of informants. A shared perception of the clinical situation is progressively achieved via team meetings. IA helps clinicians to overcome the many challenges posed in today's context for assessment and treatment planning in the field of neurodevelopmental disorders. Most national and international guidelines recommend the inclusion of IA in the diagnostic workup for complex cases (e.g., autism spectrum and attention deficit hyperactivity disorder). Hence, IA should always be part of the neurodevelopmental disorder diagnostic process in children in general and preterm infants in particular.

Practice Patterns for Early Screening and Evaluation for Autism Spectrum Disorder Diagnosis in Bulgaria

The aims of this study were to describe the practice patterns for early screening and evaluation for ASD diagnosis in Bulgaria, as well as to identify potential barriers and facilitators in this process. We surveyed a sample of pediatricians and pediatric psychiatrists to analyze the use of standardized instruments, application of biomarkers, parental collaboration and future policy prospects. We found a significant support for the idea of a national program for ASD in Bulgaria. These insights provide an evidence-based analysis that could help improve services, guide research and inform policies in regard to ASD. Further work is necessary to better understand other stakeholders' opinions and perspectives, especially those of patients and their families.

Child and Family Characteristics that Predict Autism Spectrum Disorder Specialty Clinic Appointment Attendance and Alignment with Providers

We examined factors contributing to initial appointment attendance, alignment between parents' pre-visit and clinicians' diagnostic impressions, and family commitment to follow-ups at an autism spectrum disorder (ASD) specialty clinic. Sample sizes were n = 6558 (initial), n = 1430 (alignment), and n = 1353 (follow-up). Parents completed surveys and clinicians provided their ASD diagnostic impressions. When children were not receiving intervention, families were less likely to keep their initial appointment. Families residing long distances and having older children were less likely to keep their initial and follow-up appointments. African American families were less likely to keep their initial appointment and expressed initial doubts with providers about the diagnosis. Findings suggest that some children are not getting diagnostic clarity or accessing timely services.

Implementation of a Practice Development Model to Reduce the Wait for Autism Spectrum Diagnosis in Adults

This study examined waiting times for diagnostic assessment of Autism Spectrum Disorder in 11 adult services, prior to and following the implementation of a 12 month change program. Methods to support change are reported and a multi-level modelling approach determined the effect of the change program on overall wait times. Results were statistically significant (b = − 0.25, t(136) = − 2.88, p = 0.005). The average time individuals waited for diagnosis across all services reduced from 149.4 days prior to the change program and 119.5 days after it, with an average reduction of 29.9 days overall. This innovative intervention provides a promising framework for service improvement to reduce the wait for diagnostic assessment of ASD in adults across the range of spectrum presentations.