Korea University · Medicine
Professor Chol Shin's research lab specializes in population-based epidemiology with a focus on sleep disorders, metabolic health, and their interrelationships in the Korean adult population. Key research directions include the prevalence and determinants of restless legs syndrome, insomnia, excessive daytime sleepiness, and obstructive sleep apnea, particularly in relation to menopausal status, chronotype, and metabolic profiles. The lab also investigates the impact of lifestyle behaviors—such as snoring, sleep-wake patterns, and dietary habits—on cardiometabolic and quality-of-life outcomes in non-obese and middle-aged populations. Using large-scale community surveys and clinical data, the lab aims to identify modifiable risk factors and inform public health interventions.
Figures are computed from collected data and may differ slightly.
The present study was purposed to identify the prevalence of restless legs syndrome (RLS) and its associated factors in the Korean adult population. Among a total of 9939 participants derived from the Korean Health and Genome Study, 12.1% of subjects (men, 8.5%; women, 15.4%) suffered from RLS. Factors independently related with RLS were older age and frequent fatigue in both men and women.
A questionnaire survey was carried out to examine the sleep habits and excessive daytime sleepiness (EDS) of 3871 high school students with a mean age of 16.8 years in Korea. The results showed that mean total sleep time was 6.3 h/day for male students and 6.5 h/day for female students, which may be insufficient for adolescence during puberty. The overall prevalence of EDS (defined as an Epworth sleepiness scale score of >10) was 15.9% (14.9% for boys and 18.2% for girls). The prevalence of EDS
Although the prevalence of insomnia and the association of insomnia with menopause have been well reported, not much work has been conducted in population-based research on insomnia and menopause in Korea. The purpose of the present report was to determine overall and different prevalence of insomnia by menopausal status, and the relationship between insomnia and menopause in a population-based sample of middle-aged Korean women. A total of 96.1% of 2497 randomly selected middle-aged Korean wome
Habitual snoring is associated with cardiovascular morbidity and mortality, and metabolic abnormalities such as impaired glucose homeostasis. Many studies were performed in obese Western populations. The purpose of this study was to examine the association of habitual snoring with glucose and insulin metabolism in nonobese Korean men who were free of diabetes and hypertension. A total of 2,719 men ages 40-69 years from the Korean Health and Genome Study participated in this study. Information of
This study investigates health behaviors, health-related quality of life (HRQOL) and sleep among chronotypes in a community-based sample (n = 2,976). Analysis of covariance indicated evening types (E-types) had a significantly higher percentage of current smokers and more sleep-interfering behaviors compared to intermediate and morning types (M-type), and also lower physical activity and more sleep disturbance compared to M-types. E-types also had worse mental HRQOL compared to both chronotypes,
There is a significant association between OSA and periodontal disease. Further research is needed to clarify the causal relationship between the two conditions.
Suh S; Kim H; Yang HC; Cho ER; Lee SK; Shin C. Longitudinal course of depression scores with and without insomnia in non-depressed individuals: a 6-year follow-up longitudinal study in a Korean cohort. SLEEP 2013;36(3):369-376.
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