“Our results motivate a paradigm shift to challenge how ASD, ADHD, and OCD are currently defined, diagnosed, and treated. In particular, this paper adds to the evidence that these diagnoses may not exist as uniquely-defined diagnostic constructs, and highlights the need to discover other groupings that may be more closely aligned with biology and/or response to treatment.”
So, this study by Kushki et al 2019 is by no means simple. However, the results support our clinical experience of the overlap and common features seen in practice. We see similar overlap is the assessment data we gather, particularly when we SIPT our clients with these diagnoses. The study uses state of the art technology and research methodologies, statistical calculations, and techniques I had never heard of. I had to look them up. However, the research appears to support what we see in clinical practice. I look forward to reading more by these researchers in Canada.
“…we used a data-driven, diagnosis-agnostic approach to examine overlap across three neurodevelopmental disorders (ASD, ADHD, and OCD)…we observed that differences in the domains primarily affected in these disorders may exist along a continuum that includes typical development.”
“The majority of the data-driven clusters contained participants from multiple diagnostic categories, highlighting shared phenotypes and neurobiologies among the diagnostic groups.”
“Social difficulties and inattention are commonly reported as shared features of ASD, ADHD, and OCD….our results support the emerging recognition that the existing behaviorally-defined diagnostic labels may not capture etiologically, biologically, and phenomenologically homogeneous groups.“
“…our results are consistent with the notion that that the ASD-like features, and to some extent inattention traits, exist across a continuum that includes typical development”
Read more here: https://www.nature.com/articles/s41398-019-0631-2