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Comparison of Sleep Duration, Social Jetlag, and Subjective Sleep Disturbance in Rotating Shift Nurses According to the Chronotype

Choi SJ, Joo EY, Kim KS

Purpose: The purpose of this study was to investigate the sleep duration, social jetlag (SJL), and subjective sleep disturbance according to the individual chronotype in rotating shift nurses. Methods: A...
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Sex Differences in Obstructive Sleep Apnea by Bioelectrical Impedance Analysis

Kim JR, Song P, Joo EY

Background and Purpose Obesity is known of one of the risk factors for obstructive sleep apnea (OSA). Although body mass index (BMI) can be an indicator for obesity, it does...
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A Sensitive and Specific Liquid ChromatographyTandem Mass Spectrometry Assay for Simultaneous Quantification of Salivary Melatonin and Cortisol: Development and Comparison With Immunoassays

Shin S, Oh H, Park HR, Joo EY, Lee SY

Melatonin and cortisol are clinically important for diagnosing sleep and mood disorders. We developed and validated a liquid chromatography-tandem mass spectrometry (LC-MS/ MS) assay for simultaneous measurement of salivary melatonin and...
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Effects of Evening Exposure to Light from Organic Light-Emitting Diodes on Melatonin and Sleep

Park HR, Choi SJ, Jo H, Cho JW, Joo EY

Background and Purpose: Organic light-emitting diodes (OLEDs) emit less blue light than traditional light-emitting diodes (LEDs), but the effects of OLED light exposure (LE) on melatonin and sleep have not...
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Sleep and Nocturia in Under Age 50 Male Patients with Obstructive Sleep Apnea Syndrome

Chung YH, Choi SJ, Kim JR, Park J, Joo EY

Objectives: To investigate the prevalence of nocturia in young patients with obstructive sleep apnea syndrome (OSAS) and to find out the risk factors of nocturia in the patients. Methods: We enrolled...
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Effect of Sleep Quality on Headache-Related Impact in Primary Headache Disorders

Cho S, Lee MJ, Park HR, Kim S, Joo EY, Chung CS

Background and Purpose Sleep disturbance is common in patients with primary headache disorders. We were interest in whether poor sleep quality affects patients directly or via increases in the frequency and...
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Identification of Sleep Apnea Severity Based on Deep Learning from a Short-term Normal ECG

Urtnasan E, Park JU, Joo EY, Lee KJ

Background: This paper proposes a novel method for automatically identifying sleep apnea (SA) severity based on deep learning from a short-term normal electrocardiography (ECG) signal. Methods: A convolutional neural network (CNN)...
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Insomnia Symptoms and Mood Disturbances in Shift Workers with Different Chronotypes and Working Schedules

Choi SJ, Song P, Suh S, Joo EY, Lee SI

BACKGROUND AND PURPOSE: Shift workers frequently suffer from insomnia and mood disturbances, but little is known about the relationships of these conditions with the chronotypes and different working schedules of...
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A Case Study of Imagery Rehearsal Therapy in a Nightmare Disorder Patient with Posttraumatic Stress Disorder

Park S, Choi SJ, Joo EY, Suh S

Nightmares are vivid, unpleasant dreams that result in awakening during sleep. According to previous studies, the prevalence of nightmare disorder is 2–5% of the general population and is associated with...
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Effects of Light on Daytime Sleep in 12 Hours Night Shift Workers: A Field Study

Choi SJ, Park HR, Joo EY

OBJECTIVES: Night shift workers suffer from sleep and daytime disturbances due to circadian misalignment. To investigate the role of environmental light in daytime sleep following 12 h-night shift work. METHODS: We...
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Chronic insomnia disorder: perspectives from structural neuroimaging

Joo EY

Chronic insomnia disorder is the most widely reported clinical condition in medicine. It has a significant impact on populations and is characterized by chronically disturbed sleep and sleep loss, non-refreshing...
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Updates on structural neuroimaging of narcolepsy with cataplexy

Joo EY

Narcolepsy is a chronic neurological disorder associated with abnormal regulation of the sleep-wake cycle, resulting in excessive daytime sleepiness, disturbed nocturnal sleep, and rapid eye movement (REM) sleep phenomena including...
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Altered Regional Cerebral Blood Flow Associated with Mood and Sleep in Shift Workers: Cerebral Perfusion Magnetic Resonance Imaging Study

Park YK, Kim JH, Choi SJ, Kim ST, Joo EY

BACKGROUND AND PURPOSE: Shift work disrupts the body's circadian rhythms and increases the risk of health problems. Despite evidence of neuropsychological disturbances in shift workers (SW), the brain functional status...
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Validation of the Munich ChronoType Questionnaire in Korean Older Adults

Ryu H, Joo EY, Choi SJ, Suh S

OBJECTIVE: This study aimed to evaluate psychometric properties of the Munich ChronoType Questionnaire (MCTQ) in a sample of Korean older adults. METHODS: One-hundred ninety two participants aged 65 and over completed...
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Hematoma-Related Nonhabitual Seizures during Subdural Electrode Monitoring

Hwang KJ, Joo EY, Hong SB, Seo DW

No abstract available.
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Erratum: Assessing Sleep-Wake Pattern and Chronotype with the Korean Munich ChronoType for Shift-Workers in Shift Working Nurses

Choi SJ, Suh S, Joo EY

We would like to correct the acknowledgments.
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A Nationwide Survey of Shift Schedules for Sleep Technicians in Korea

Lee SY, Choi SJ, Suh S, Song P, Joo EY, Shift Work Disorder Study Group

OBJECTIVES: It is a paradox that sleep technicians are at risk of shift work sleep disorder to help diagnose other people's sleep disorder. Until now, there have been no guidelines...
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Clinical Factors Related to the Response of IV Ferric Carboxymaltose Treatment in Patients with Restless Legs Syndrome

Park HR, Park HS, Choi SJ, Joo EY

OBJECTIVES: Significant benefit of intravenous ferric carboxymaltose (FCM) for restless legs syndrome (RLS) has been demonstrated. However, clinical indicators to expect treatment response of RLS are not clarified. The aim...
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Sleep Disorders Documented by Night Polysomnography in Patients with Chronic Insomnia Disorder

Kang MR, Choi SJ, Joo EY

BACKGROUND: To investigate the sleep disorders related to chronic insomnia and compare the characteristics of each group. METHODS: We registered 191 patients (female 56.0%, age 61.7 years) who have complained about...
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Frequency of Self-Monitoring of Blood Glucose during the School Day Is Associated with the Optimal Glycemic Control among Korean Adolescents with Type 1 Diabetes

Joo EY, Lee JE, Kang HS, Park SG, Hong YH, Shin YL, Sohn M

BACKGROUND: This study aimed to evaluate the relationship between the frequency of self-monitoring of blood glucose (SMBG) and glycosylated hemoglobin (HbA1c) levels among Korean adolescents with type 1 diabetes mellitus...
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