ClinicalTrials.gg
CompletedNCT02409303Updated Nov 3, 2022

An SRT Model for Early Access to ASD Intervention

An interventional study of Screen-Refer-Treat Intervention in Autism Spectrum Disorder, sponsored by University of Washington. Completed at 1 site in United States. Open to participants aged 16 Months and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-11-03.

Sponsored by University of Washington · Not applicable, Interventional, and Health services research

Phase
Not applicable
Study type
Interventional
Enrollment
627
Allocation
Randomized
Ages
16 Months and older
Sex
All
01

Study summary

This project will implement and evaluate an innovative healthcare service delivery model designed to promote earlier access to specialized intervention for toddlers with ASD. The Screen-Refer-Treat (SRT) model provides a coordinated and cost-effective approach to early identification and intervention by involving both medical and EI providers, and represents a practical and sustainable strategy for bridging the gap between ASD concerns and ASD intervention.

Read the detailed description

Although caregivers often become concerned about their child by 17-19 months of age, children do not typically receive a diagnosis of autism spectrum disorder (ASD) until they are 4½ years old, or older for Hispanic families. It is now well documented that early participation in ASD-specialized intervention can lead to significant improvements in skills and behavior for toddlers with ASD. However, despite the availability of publicly funded Part C early intervention (EI) services, long waits for a formal ASD diagnosis can prevent toddlers from receiving appropriately specialized intervention during the critical birth-to-three years. In addition, caregivers concerned about ASD experience high levels of uncertainty and stress during this waiting period. This project will implement and evaluate an innovative healthcare service delivery model designed to promote earlier access to specialized intervention for toddlers with ASD. The Screen-Refer-Treat (SRT) model provides a coordinated and cost-effective approach to early identification and intervention by involving both medical and EI providers, and represents a practical and sustainable strategy for bridging the gap between ASD concerns and ASD intervention. The SRT model, which builds on the availability of validated ASD screening tools and low-cost behaviorally-based ASD interventions, will be implemented in four diverse communities across Washington State to evaluate changes in service delivery practices for toddlers with Hispanic as well as Non-Hispanic backgrounds. The SRT model comprises three components: (1) universal ASD screening at 16-20 months and prompt referral to EI programs by primary care physicians (PCPs); (2) expedited ASD assessments within EI programs; and (3) use of an inexpensive, evidence-based ASD-specialized intervention by EI providers. An electronic version of the Modified Checklist for Autism (M-CHAT) with automated scoring that incorporates relevant follow-up questions will be provided to PCP practices, and distance coaching via telemedicine will be available to EI providers to support their ASD assessment and intervention activities. A stepped wedge cluster RCT design will be used to evaluate implementation and outcomes of the SRT model. Data on screening, referral, assessment, and intervention practices will be collected from 40 PCPs and 80 EI providers across the state prior to and following SRT implementation to identify practice changes. In addition, separate samples of caregivers of toddlers with ASD concerns (n=245) will be recruited from communities before and after SRT implementation and followed prospectively to measure differences and changes over time in caregiver wellbeing, parenting efficacy, satisfaction with healthcare systems, and toddler's social-communicative behaviors. We predict that implementation of the SRT model will be associated with higher rates of ASD screening by PCPs, earlier referral to EI programs, earlier initiation of ASD-specialized intervention, reduced time between ASD concerns and diagnosis, and improved caregiver and child outcomes.

02

Conditions studied

  • Autism Spectrum Disorder

Keywords

  • Autism Spectrum Disorder
  • Screening
  • Preventive intervention
  • Risk
03

In context

Autism Spectrum Disorder

1,755 studies on the registry are indexed under Autism Spectrum Disorder; 507 are open to participants now.

This study's enrollment of 627 is above the median of 52 across 1,391 interventional studies indexed under Autism Spectrum Disorder.

Browse Autism Spectrum Disorder studies →

Lead sponsor

University of Washington is the lead sponsor of 1,431 studies on the registry; 226 are open to participants now.

Of its 158 completed or terminated interventional studies of FDA-regulated products, 136 (86%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
16 Months and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

PCPs:

-PCPs must work at a participating primary care practice.

EI Providers:

-EI providers must work at a participating early intervention agency.

Caregivers and Toddlers:

To be categorized as part of the ASD Concerns Sample recruited from PCP offices:

  • Toddlers must demonstrate ASD risk/concern by meeting at least one of the following criteria: (1) behaviorally-based caregiver concerns about the presence of ASD; (2) behaviorally-based PCP concerns about the presence of ASD; (3) having an older sibling with an ASD diagnosis; or (4) screening positive for ASD on a validated screening tool.
  • Toddlers must be between 16-20 months of age

To be categorized as part of the No ASD Concerns Sample recruited from PCP offices:

- Toddlers must be between 16-20 months of age

To be categorized as part of the ASD Dx/ASD Concerns Sample recruited from EI agencies:

  • Toddlers must demonstrate ASD risk/concern by meeting at least one of the following criteria: (1) behaviorally-based caregiver concerns about the presence of ASD; (2) behaviorally-based PCP concerns about the presence of ASD; (3) having an older sibling with an ASD diagnosis; (4) screening positive for ASD on a validated screening tool; or (5) parent-report of an ASD diagnosis.
  • Toddlers must be between 16-30 months of age

Exclusion criteria

Exclusion Criteria:

-There are no exclusion criteria for PCPs or EI providers.

Caregivers/toddlers meeting the inclusion criteria described above will be excluded if the caregiver:

-reports that the toddler has any severe visual, auditory, or physical impairments, and/or serious medical, genetic, or neurological disorders

05

Study design

Phase
Not applicable
Primary purpose
Health services research
Allocation
Randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
627 participants (actual)

Study arms

  • Experimental
    Screen-Refer-Treat Intervention

    PCPs and EI Providers receive training workshops on validated, evidence-based practices (i.e., Online M-CHAT-R/F, STAT, and RIT) and then receive TA (i.e., Screen-Refer-Treat Intervention). At the county level, providers are randomized to the order/timing at which they will receive this system intervention

    Behavioral: Screen-Refer-Treat Intervention

  • No intervention
    Control

    No intervention received.

Interventions

  • BehavioralScreen-Refer-Treat Intervention

    This intervention is healthcare system intervention that trains providers on validated screening tools (Online M-CHAT-R/F and STAT) and an evidence-based behavioral intervention (RIT). PCPs receive a 2-hour training workshop on the Online M-CHAT-R/F and EI Providers receive 2 day-long training workshops, one on the STAT/expedited assessment and one RIT.

06

What researchers measure

Primary outcomes

  1. Change in rates of ASD screening by PCPs at the 18-month Well-Child visit from baseline (pre-SRT intervention) to post-SRT intervention

    PCP self-report

    Time frame: 5 times over 4 years

  2. Change in rates of referral for early intervention services by PCPs at the 18-month Well-Child visit from baseline (pre-SRT intervention) to post-SRT intervention

    PCP self-report

    Time frame: 5 times over 4 years

  3. Change in percent of toddlers at risk for ASD recieving ASD-specialized behavioral intervention before 24 months from baseline (pre-SRT intervention) to post-SRT intervention

    Caregiver report

    Time frame: Every 3 months until toddlers turn 36 months of age

  4. Change in average age at which children receive an ASD diagnosis from baseline (pre-SRT intervention) to post-SRT intervention

    Caregiver report

    Time frame: Every 3 months until toddlers turn 36 months of age

  5. Change in levels of parenting stress, parenting efficacy, health quality of life, and satisfaction with the healthcare system from baseline (pre-SRT intervention) to post-SRT intervention

    Caregiver self-report

    Time frame: Every 3 months until children turn 36 months of age

  6. Change in levels of pivotal social-communicative behaviors in toddlers at risk for ASD from baseline (pre-SRT intervention) to post-SRT intervention

    Caregiver report

    Time frame: Every 3 months until children turn 36 months of age

07

Study locations

1 site
  • University of Washington
    Seattle, Washington 98195, United States
08

References and documents

Publications

  • Tagavi DM, Dick CC, Attar SM, Ibanez LV, Stone WL. The implementation of the screening tool for autism in toddlers in Part C early intervention programs: An 18-month follow-up. Autism. 2023 Jan;27(1):173-187. doi: 10.1177/13623613221086329. Epub 2022 Apr 11. PubMed 35403446 ↗
  • Steinman KJ, Stone WL, Ibanez LV, Attar SM. Reducing Barriers to Autism Screening in Community Primary Care: A Pragmatic Trial Using Web-Based Screening. Acad Pediatr. 2022 Mar;22(2):263-270. doi: 10.1016/j.acap.2021.04.017. Epub 2021 Apr 23. PubMed 33901728 ↗
  • Ibanez LV, Stoep AV, Myers K, Zhou C, Dorsey S, Steinman KJ, Stone WL. Promoting early autism detection and intervention in underserved communities: study protocol for a pragmatic trial using a stepped-wedge design. BMC Psychiatry. 2019 Jun 7;19(1):169. doi: 10.1186/s12888-019-2150-3. PubMed 31174514 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 3, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02409303
Responsible party
Wendy Stone (Professor of Psychology, University of Washington) — Principal investigator
First posted
Apr 6, 2015
Start date
Jul 2015
Primary completion
Jun 2019
Completion
Jun 2019
Last update
Nov 3, 2022

Study contacts

Wendy L Stone, PhD
principal investigator · University of Washington

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2022. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion