922 Index
Circadian rhythm sleep-wake disorders 
(continued)
advanced sleep phase type (continued)
differential diagnosis of, 394
functional consequences of, 394
prevalence of, 393
risk and prognostic factors for, 394
specifiers for, 393
delayed sleep phase type, 391–392
associated features supporting diagnosis 
of, 391
comorbidity with, 392
development and course of, 391
diagnostic features of, 391
diagnostic markers for, 392
differential diagnosis of, 392
functional consequences of, 392
prevalence of, 391
risk and prognostic factors for, 392
diagnostic criteria for, 390–391
irregular sleep-wake type, 394–396
associated features supporting diagnosis 
of, 395
comorbidity with, 396
development and course of, 395
diagnostic features of, 394–395
diagnostic markers for, 395
differential diagnosis of, 395
functional consequences of, 395
prevalence of, 395
risk and prognostic factors for, 395
non-24-hour sleep-wake type, 396–397
associated features supporting diagnosis 
of, 396
comorbidity with, 397
development and course of, 396
diagnostic features of, 396
diagnostic markers for, 397
differential diagnosis of, 397
functional consequences of, 397
prevalence of, 396
risk and prognostic factors for, 396–397
relationship to International Classification of 
Sleep Disorders, 398
shift work type, 397–398
comorbidity with, 398
development and course of, 398
diagnostic features of, 397