Impact and Effectiveness of Training Primary Care Clinicians to Diagnose Autism in Children 18-36 Months by Primary Care Clinicians: A Multisite Study

The investigators will conduct a multisite hybrid 1 effectiveness-implementation cluster randomized clinical trial to determine if training Primary Care Clinicians (PCCs) to diagnose autism spectrum disorder (ASD) in young children is an effective strategy for decreasing time from a result indicative of increased likelihood of autism, as determined from a visit in primary care, to diagnostic resolution defined as either making or excluding a diagnosis of autism. The investigators will also assess diagnostic concordance between PCCs and autism experts and facilitators and barriers to implementation of this model. Through pediatric clinics, the investigators will be training primary care clinicians (PCCs) to diagnose ASD as part of an established training program, and will assess their diagnostic accuracy by prospectively enrolling patients at the time of their referral for a confirmatory evaluation by a DBP and comparing their CARS scores and certainty ratings. PCCs will be surveyed about their experiences and feedback about training.

There are 3 cohorts of participants in this study:

Group 1 are primary care clinicians, and will be consented into the study and asked to perform the following activities: complete ASD diagnostic training, either in the immediate intervention or delayed intervention group; continue conducting ASD screening per standard of care; refer patients requiring diagnostic confirmation to one of the study sites, including evaluation on diagnostic accuracy.

Group 2 are staff at a primary care practice where one or more clinician are taking part in the training. They will be given the option to participate in surveys and/or focus groups asking about the impact of this autism assessment training on their practices and workflows.

Group 3 are the parents/legally authorized representatives of patients (age 18-36 months) with a flagged result on an autism screener, distributed per standard of care by their pediatrician/PCC's office. They will be contacted by study staff and verbally consented into the study. They will be asked to complete monthly telephone surveys, for up to 8 months. A subset (referred to as Group 3B) will be referred by their PCCs for confirmatory evaluation at one of the clinical study sites. They will be asked to provide written consent for sharing of their evaluation and relevant information from their medical record.