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Inkyung Baik 2 Articles
[English]
Association of Daily Sleep Duration with Obesity, Macronutrient Intake, and Physical Activity
Inkyung Baik, Chol Shin
Korean J Community Nutr 2011;16(3):315-323.   Published online June 30, 2011
DOI: https://doi.org/10.5720/kjcn.2011.16.3.315
AbstractAbstract PDFPubReader
There are a few studies that reported the association of sleep duration with calorie intake and energy expenditure. Using cross-sectional data from a population-based prospective study, we evaluated the association of sleep duration with indicators of obesity including body mass index and waist circumference, calorie intake and its proportion of macronutrients, and physical activity. The study subjects were 4,226 male and female adults, who were aged 40 to 69 years and were free of diagnosed cardiovascular disease, diabetes mellitus, and dyslipidemia at baseline. Robust regression analysis was used to analyze associations. The study found that sleep duration is inversely associated with waist circumference, calorie intake, and percent of calories from fat intake and is positively associated with percent of calories from carbohydrate intake and physical activity. The inverse association between sleep duration and waist circumference was stronger among men than among women. The inverse association between sleep duration and calorie intake was stronger among women than among men and such association was also stronger among obese persons than those with a normal body mass index. The positive association between sleep duration and physical activity was strongly demonstrated regardless of sex or obesity. Physical activity is positively associated with sleep duration independent of potential confounding factors including age, sex, income, occupation, marital status, education, smoking status, waist circumference, calorie and macronutrient intake, and alcohol intake.

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  • A comparative study on eating habits and mental health of Korean middle school students according to their bedtime across regions: using data from the 2020–2022 Korea Youth Risk Behavior Survey
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    Nutrition Research and Practice.2024; 18(2): 269.     CrossRef
  • Grit in Community‐Dwelling Older Adults with Low Back Pain Is Related to Self‐Physical Training Habits
    Tsubasa Kawasaki, Ryosuke Tozawa
    PM&R.2020; 12(10): 984.     CrossRef
  • Health Behaviors and Dietary Habits according to Sleep Duration in Korean Adults Based on the 2013–2015 Korea National Health and Nutrition Examination Survey
    Jin-A Kim, Sim-Yeol Lee
    Korean Journal of Health Promotion.2019; 19(4): 237.     CrossRef
  • The longitudinal influence of child maltreatment on child obesity in South Korea: The mediating effects of low self-esteem and depressive symptoms
    Aely Park, Youngmi Kim
    Children and Youth Services Review.2018; 87: 34.     CrossRef
  • Dietary behavior status and its association with study-related factors in middle school students in Gyeonggi area
    Myoung Sook Lee, Wha Jin Hyun, Kyung Hee Song
    Journal of Nutrition and Health.2018; 51(5): 455.     CrossRef
  • Relationship between Bone Mineral Density and Bone Metabolic Biochemical Markers and Diet Quality Index-International(DQI-I) in Postmenopausal Obese Women
    Yeonah Jeong, Misung Kim, Saeron Shin, Ahreum Han, Geomsuk Seo, Cheongmin Sohn
    Korean Journal of Community Nutrition.2016; 21(3): 284.     CrossRef
  • Difference in Sleep Circadian Rhythm and Sleep Quality between Normal-weight and Obese Group
    Hyun Jin Suk, Yeon Kyung Na, Hae Sook Hong
    Journal of Korean Biological Nursing Science.2014; 16(4): 309.     CrossRef
  • Experiences of Health Related Lifestyles in High Body Fat but Non-obese Female College Students in Korea
    Jeongsoo Kim
    Osong Public Health and Research Perspectives.2014; 5(1): 68.     CrossRef
  • Predictors of Poor Sleep Quality among Nursing Students
    Young Ran Chae, Dong Hee Choi, Su Jeong Yu
    Journal of Korean Biological Nursing Science.2014; 16(2): 98.     CrossRef
  • Correlation between Sleep Quality and Snack Intake in Third Year Middle and High School Students in the Gwangju Area
    Hyo Bok Kim, Yang Won Park
    Journal of the Korean Society of Food Science and Nutrition.2013; 42(2): 212.     CrossRef
  • A Study on the Correlation of the accompanying symptoms, Heart Rate Variability and Body Component Analysis in 350 Insomnia Patients
    Ji-Won Ha, Bo-Kyung Kim, Jin-Hyeong Jung
    Journal of Oriental Neuropsychiatry.2012; 23(3): 47.     CrossRef
  • Physical activity level, total daily energy expenditure, and estimated energy expenditure in normal weight and overweight or obese children and adolescents
    Myung Hee Kim, Eun Kyung Kim
    Korean Journal of Nutrition.2012; 45(6): 511.     CrossRef
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[English]
Optimal Waist Circumference for the Prevention of Cardiovascular Disease
Inkyung Baik, Chol Shin
Korean J Community Nutr 2010;15(2):275-283.   Published online April 30, 2010
AbstractAbstract PDF
There are few studies reporting optimal waist circumference that can be utilized to prevent the incidence of cardiovascular disease (CVD). We evaluated the association of waist circumference and waist and hip circumference ratio (WHR) with incident cases of CVD developed over 6 years in a population-based prospective study including Korean adults. Analyses for receiver-operating characteristic (ROC) curve were performed with data for 1,733 men and 1,579 women who were aged 40 to 69 years and were free of a physician-diagnosis of CVD at baseline. Information on the diagnosis of CVD was periodically reported using interviewer-administered questionnaires and anthropometric measures were obtained by biennial health examinations. We newly identified 77 cases of CVD during a follow-up period between 2003 and 2008. On the basis of measures of diagnostic accuracy including minimum distance to ROC curve and Youden index, waist circumference of 85 cm for men, in particular for male nonsmokers, and of 80 cm for women and WHR of 0.88 to 0.90 for men and of 0.83 for women were found to be optimal cutoff points to identify individuals at CVD risks. The study also found that the use of the suggested optimal values for waist circumference show higher sensitivity and lower specificity compared with 90 cm for men and 85 cm for women, which are waist cutoff points given by the Korean Society for the Study of Obesity to define abdominal obesity for Korean adults. Although lower cutoff points of waist circumference (83 cm) and WHR (0.87) were observed to be optimal for male smokers compared with male nonsmokers, whether suggesting waist cutoff points specific to smokers is needed warrants further studies. After taking into account other cardiovascular risk factors including smoking, men with waist circumference of 85 cm or greater and women with 80 cm or greater were at an increased risk of CVD. Thus, these cutoff points of waist circumference may be able to capture more individuals at CVD risks contributing to the prevention of future development of CVD.
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