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(p. 11) Epidemiology of Pediatric Irritability 

(p. 11) Epidemiology of Pediatric Irritability
(p. 11) Epidemiology of Pediatric Irritability

Giovanni Abrahão Salum

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date: 24 April 2019

Irritability is a trait, continuously distributed in the population, that might reach pathological levels such as those presented in a disruptive mood dysregulation disorder (DMDD) diagnosis. In this chapter, the author reviews the epidemiology of irritability as a dimension and the epidemiology of DMDD as the diagnostic category that most explicitly captures the clinical features of pathological irritability. Dimensional analysis includes the prevalence of the core features of trait irritability, the trait distribution, levels of co-occurrence of irritability with other traits, and cutoffs that separate normative irritability from problem indicators. Categorical analysis includes a literature review with meta-analysis summarizing the prevalence rates of DMDD and developmental effects on DMDD prevalence, risk factors for this disorder, and co-occurrence patterns with other mental disorders. The author also discusses the current challenges of epidemiological research in pediatric irritability.

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