User:Sassmith/sandbox

DMDD symptoms commonly overlap with bipolar disorder and ADHD, making it difficult to contribute arousal symptoms to DMDD alone.

Youth diagnosed with DMDD also showed symptoms that almost entirely overlapped with ODD symptoms and showed no significant difference regarding behavioral impairments of comorbidity.

With a diagnosis of DMDD at an early age (6 years), it is predictive of several comorbidities including ODD, mood disorders, and ADHD in a three-year longitudinal study.