The new diagnosis of Disruptive Mood Dysregulation Disorder (DMDD) was partly developed in an effort to mitigate the over-diagnosis and pharmacotherapy of Juvenile Bipolar Disorder (BPD).  Unfortunately, as this paper shows, a higher number of children have been diagnosed with DMDD than BPD (7.677 vs 6480), received more medication (81.9% vs 69.4%) and been hospitalised (45% vs 33%).

Findling, R. L., Zhou, X., George, P., & Chappell, P. B. (2021). Diagnostic Trends and Prescription Patterns in Disruptive Mood Dysregulation Disorder and Bipolar Disorder. Journal of the American Academy of Child & Adolescent Psychiatry.

https://www.jaacap.org/article/S0890-8567(21)00360-9/fulltext?dgcid=raven_jbs_aip_email