Study Objectives: Obstructive sleep apnea (OSA) has been associated with psychiatric pathology. Psychiatric comorbidity in OSA may affect patient quality of life and adherence to CPAP. A focused evaluation of OSA in highly selected groups of primarily psychiatric patients may provide further insights into the factors contributing to comorbidity of OSA and psychopathology. The goal of this study is to examine the prevalence and treatment of OSA in psychiatric populations. Methods: A systematic review following the PRISMA guidelines was conducted to determine the prevalence of OSA in schizophrenia and other psychotic disorders, mood disorders, and anxiety disorders, and to examine potential interventions. The PubMed, EMBASE, and PsycINFO databases were searched (last search April 26, 2014) using keywords based on the ICD-9-CM coding for OSA and the DSM-IV-TR diagnostic groups. Results: The search retrieved 48 records concerning studies of OSA in the selected disorders. The prevalence studies indicate that there may be an increased prevalence of OSA in individuals with major depressive disorder (MDD) and posttraumatic stress disorder (PTSD), despite considerable heterogeneity and a high risk of bias. There was insuffi cient evidence to support increased OSA in schizophrenia and psychotic disorders, bipolar and related disorders, and anxiety disorders other than PTSD. Studies of treatment of OSA indicate an improvement in both OSA and psychiatric symptoms. CPAP adherence was reduced in veterans with PTSD. Conclusions: OSA prevalence may be increased in MDD and PTSD. In individuals with OSA and psychiatric illness, treatment of both disorders should be considered for optimal treatment outcomes. 1 According to a major US study of OSA diagnosed by polysomnography (PSG), the prevalence of OSA, as defi ned by an apnea-hypopnea index (AHI) ≥ 5 and without inclusion of a daytime sleepiness criterion, was reported as 24% for men and 9% for women under the age of 65 years; addition of a daytime sleepiness criterion reduced these estimates to 4% for men and 2% for women. 1,2 OSA is commonly associated with metabolic syndrome including comorbid obesity, hypertension, and diabetes.1 Upper airway obstruction may present as apneas, hypopneas, or respiratory effort-related arousals (RERAs), resulting in oxygen desaturation, repeated arousals and sleep fragmentation. Recently, there has been an increase in reports of comorbidity of OSA with psychological/psychiatric symptoms. Psychiatric comorbidity in OSA has been reported to adversely affect the quality of life of OSA patients and adherence to CPAP therapy.
3-5Psychological symptoms such as depression and anxiety are commonly reported in adults with OSA; however, the relationship between OSA and full psychiatric syndromes is less clear. Global prevalence studies and reviews have suggested that there are elevated rates of psychological symptoms in individuals with OSA. [17][18][19] Studies that have evaluated the prevalence of OSA in the highly selected groups of psychiatric popu...