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

Overall Levels of Clinician Certainty in Their Expert Clinician Diagnosis (ECD), and by ECDs of ASD and Non-ASD For the whole sample, clinicians made an ECD with certainty in 348 of 496 cases (70.2%), with a trend for higher levels of certainty for ECD diagnosis of Non-ASD relative to ASD, although this trend did not reach statistical significance (“Certain” ECD for ASD of 67.1% and for Non-ASD of 72.9%, χ 2 (df) = 1.991 (1), p = 0.158; see below for a more detailed analysis of this trend).

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