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The objective of this study was to investigate the reliability and validity of the Pittsburgh Sleep Quality Index (PSQI) in a non-clinical sample consisting of younger and older adults. There has been little research validating the PSQI with respect to multinight recording as with actigraphy, and more validation is needed in samples not specifically(More)
STUDY OBJECTIVES To examine the prevalence and clinical characteristics of REM sleep behavior disorder (RBD) and subclinical RBD in the Korean elderly population. DESIGN A community-based Korean Longitudinal Study on Cognitive Aging and Dementia and time-synchronized video-polysomnography (vPSG) in a laboratory. SETTING Sleep laboratory in a university(More)
We evaluated the effect of OROS methylphenidate (MPH) on sleep quality and architecture in children with attention-deficit/hyperactivity disorder (ADHD) using both a parental sleep questionnaire and polysomnography. Twenty-four ADHD children who had no comorbid psychiatric or sleep disorders except for oppositional defiant disorder completed the 6-week,(More)
BACKGROUND Obstructive sleep apnea syndrome (OSAS) is associated with cardiovascular complications, and atherosclerosis is considered to mediate this association. Arterial stiffness and endothelial dysfunction are widely accepted as early markers of atherosclerosis. OBJECTIVES The purpose of this study was to investigate the influence of sleep apnea on(More)
OBJECTIVES To identify differences in cognitive function between elderly adults with sleep apnea syndrome (SAS) and healthy controls. DESIGN Cross-sectional. SETTING Sleep laboratory at Seoul National University Bundang Hospital. PARTICIPANTS Sixty-three elderly adults (26 female; mean age 68.2 ± 4.8) without cognitive disorders. MEASUREMENTS(More)
OBJECTIVES To investigate the relationship of obstructive sleep apnea (OSA) with positional dependency and to identify its clinical implication in an Asian population. DESIGN Retrospective analysis. SETTING Academic tertiary referral center. PATIENTS A total of 1170 adults (1003 men and 167 women; mean [SD] age, 50.8 [12.9] years) with OSA were(More)
BACKGROUND Weak cardiorespiratory coupling (CRC) has been suggested in patients with obstructive sleep apnea (OSA), but the effects of continuous positive airway pressure (CPAP) on CRC remain unclear. We investigated the effects of CPAP treatment on CRC in patients with severe OSA to examine possible reversibility of altered CRC. METHODS High-resolution(More)
STUDY OBJECTIVES The definition and the criteria for the successful treatment of obstructive sleep apnea vary, depending on the study. This study aimed to compare different success criteria of non-continuous positive airway pressure (non-CPAP) treatment for obstructive sleep apnea in terms of sleep quality by using cardiopulmonary coupling. METHODS We(More)
PURPOSE The aim of this study is to evaluate the changes of sleep quality in patients using a mandibular advancement device (MAD) for obstructive sleep apnea (OSA) based upon cardiopulmonary coupling (CPC). METHODS A total of 52 patients (mean age 53.7±9.6 years, range 33-74 years) were included in this study. Of them, there were 47 males (90.4%). All(More)
OBJECTIVES To compare relationships between the sleep-wake cycle and endogenous circadian rhythms in young and older adults and to examine correlates between evening naps and circadian rhythms in older adults. DESIGN For 1 week of home recording, subjects wore wrist-activity monitors and kept daily sleep logs. After the home monitoring, subjects entered(More)