differential diagnosis of, 805–806
functional consequences of, 805
proposed criteria for, 803
risk and prognostic factors for, 804
Obesity, 22
feeding and eating disorders and, 329, 344, 
348, 351–353
sleep-wake disorders and, 413
hypersomnia, 372, 373, 375, 376, 377
obstructive sleep apnea hypopnea, 
379–380, 382
sleep-related hypoventilation, 387–388, 389Obsessional jealousy, 264
Obsessive-compulsive disorder (OCD), 235–236, 
237–242
associated features supporting diagnosis of, 
238–239
comorbidity with, 243
culture-related diagnostic issues in, 240
development and course of, 239
diagnostic criteria for, 237
diagnostic features of, 238
differential diagnosis of, 242–243
functional consequences of, 241–242
gender-related diagnostic issues in, 239, 240
prevalence of, 239
risk and prognostic factors for, 239–240
specifiers for, 236, 238
suicide risk in, 240
Obsessive-compulsive personality disorder, 645, 
646, 678–682
associated features supporting diagnosis of, 
680–681
culture-related diagnostic issues in, 681
diagnostic criteria for, 678–679
diagnostic features of, 679–680
differential diagnosis of, 681–682
features and criteria in alternative DSM-5 
model for personality disorders, 764, 
768–769
gender-related diagnostic issues in, 681
prevalence of, 681
Obsessive-compulsive and related disorder due to