Index 931
functional consequences of, 367
gender-related diagnostic issues in, 366
other specified, 420
prevalence of, 364–365
relationship to International Classification of 
Sleep Disorders, 368
restricted to nonrestorative sleep, 420
risk and protective factors for, 366
unspecified, 420–421
Intellectual disability (intellectual developmental 
disorder), 31, 33–41
associated features supporting diagnosis of, 38
coding and reporting for, 33
comorbidity with, 40
culture-related diagnostic issues in, 39
development and course of, 38–39
diagnostic criteria for, 33
diagnostic features of, 37–38
diagnostic markers for, 39
differential diagnosis of, 39–40
gender-related diagnostic issues in, 39
global developmental delay, 31, 41
prevalence of, 38
relationship to other classifications, 40–41
risk and prognostic factors for, 39
specifiers for levels of severity of, 33, 34–36
unspecified intellectual disability, 41
Intermittent explosive disorder, 461, 466–469
associated features supporting diagnosis of, 
467
comorbidity with, 469
culture-related diagnostic issues in, 468
development and course of, 467
diagnostic criteria for, 466
diagnostic features of, 466–467
differential diagnosis of, 468–469
functional consequences of, 468
gender-related diagnostic issues in, 468
prevalence of, 467
risk and prognostic factors for, 467–468
Internalizing disorders, 13
International Classification of Diseases (ICD), 21
revision process for ICD-11, 6, 10, 11–12