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J Sleep Med > Volume 17(1); 2020 > Article
J Sleep Med. 2020;17(1):37-43.         doi: https://doi.org/10.13078/jsm.190051
Sleep Status among Older Adults in Korea according to Urban or Rural Area Residence
Yun Ho Choi1 , Min Kyung Chu2 , Won-Joo Kim2
1Department of Neurology, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
2Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
Corresponding Author: Won-Joo Kim ,Tel: +82-2-2019-3320, Fax: +82-2-3462-5904, Email: kzoo@yuhs.ac
Received: December 16, 2019   Revised: April 28, 2020   Accepted: June 2, 2020   Published online: June 30, 2020
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Objectives: Older adults have more sleep disorders than younger individuals and are more vulnerable to environmental factors affecting sleep. We sought to study sleep status among older adults in Korea according to the residential area.
Methods: The present study used data from a nationwide, cross-sectional study on sleep status among older Koreans aged 65 to 86 years. Epworth Sleepiness Scale (ESS) and Pittsburgh Sleep Quality Index (PSQI) values were used to classify sleepiness. The Insomnia Severity Index (ISI) was applied to evaluate insomnia symptoms, and the Berlin Questionnaire was utilized to identify those at high risk of sleep apnea. The Cambridge-Hopkins diagnostic questionnaire was used to assess the prevalence of restless legs syndrome.
Results: Study participants were divided according to the residential area: metropolitan city, city, or rural area. Total sleep time on weekdays and weekend days showed no difference. ESS and PSQI scores did not differ among residential area groups. Meanwhile, the average ISI score was higher among residents in rural areas. The risk of obstructive sleep apnea and the prevalence of restless legs syndrome were similar in all groups.
Conclusions: Our results indicate that poor sleepers and high ISI are more common in rural areas of Korea. Future studies of the causes and proper treatments thereof are warranted.
Keywords: Sleep | Aged | Insomnia | Sleep apnea syndromes | Restless legs syndrome
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