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J Sleep Med > Volume 17(2); 2020 > Article
ORIGINAL ARTICLE
J Sleep Med. 2020;17(2):181-187.         doi: https://doi.org/10.13078/jsm.200035
Effect of Social Jetlag on Sleep and Respiratory Disturbance in Young Patients with Obstructive Sleep Apnea Syndrome
Hyunjin Jo1 , Eunhee Jang2 , Su Jung Choi1,3 , Sooyeon Suh2 , Eun Yeon Joo1
1Department of Neurology, Neuroscience Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
2Department of Psychology, Sungshin Women’s University, Seoul, Korea
3Department of Nursing, Department of Clinical Nursing Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
Corresponding Author: Eun Yeon Joo ,Tel: +82-2-3410-3597, Fax: +82-2-3410-0052, Email: eunyeon.joo@gmail.com
Received: November 13, 2020   Revised: December 10, 2020   Accepted: December 15, 2020   Published online: December 31, 2020
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ABSTRACT
Objectives: Circadian misalignment may increase the risk of obesity and related obstructive sleep apnea (OSA). Considerable young adults have social jetlag (SJL), which is defined as the time discrepancy between workdays and free days. We aim to evaluate the relationship between SJL and sleep and respiratory disturbance in patients with untreated OSA patients.
Methods: A total of 180 OSA patients under the age of 50 [mean 38.3±8.0 y, 93.3% male, mean apnea-hypopnea index (AHI) 38.2±27.4 /h] were recruited from the university affiliated sleep clinic and fulfilled sleep-related questionnaires including Munich Chronotype Questionnaire (MCTQ). SJL was defined as the difference in sleep midpoints between work and free days. Patients were divided into three groups with SJL less than 1 hour, 1–2 hours, and 2 hours or more and the clinical and sleep data of each group were compared.
Results: 51.6% (n=93) suffered from significant SJL (≥1 h). Patients with ≥2h of SJL (16.6%, n=30) had the largest neck circumference (NC). AHI and sleep parameters were not significantly different among groups except lowest oxygen saturation (LoS) was the lowest in the group of ≥2 h. SJL was positively correlated with body mass index and NC and negatively correlated with LoS after adjusting for age and sex.
Conclusions: About a half of young adults with OSA have significant SJL more than 1 h. This study suggests that SJL is associated with being overweight, while it seems not increase the severity of OSA nor deteriorate sleep quality in young adults.
Keywords: Obstructive sleep apnea | Circadian rhythm | Chronotype | Sleep | Obesity
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