J Korean Med Sci.  2012 Apr;27(4):388-394. 10.3346/jkms.2012.27.4.388.

Associations Between Screen-Based Sedentary Behavior and Cardiovascular Disease Risk Factors in Korean Youth

• Byun W
• Dowda M
• Pate RR

• KMID: 2157899
• DOI: http://doi.org/10.3346/jkms.2012.27.4.388

Abstract

The purposes of this study were to: 1) describe the patterns of screen-based sedentary behaviors, and 2) examine the association between screen-based sedentary behavior and cardiovascular disease (CVD) risk factors in representative Korean children and adolescents, aged 12 to 18 yr, in the Korean National Health and Nutrition Examination Survey. Screen-based sedentary behavior was measured using self-report questionnaires that included items for time spent watching TV and playing PC/video games. Physical activity was measured using items for frequency and duration of moderate-to-vigorous physical activity (MVPA). CVD risk factors such as body mass index (BMI), waist circumference, LDL cholesterol, HDL cholesterol, total cholesterol, triglycerides, glucose, systolic blood pressure, and diastolic blood pressure were measured. Boys spent more time playing PC/video games, and girls spent more time watching TV. After adjusting for age, gender, annual household income, and MVPA, an additional hour of watching TV was significantly associated with the risk of overweight (OR 1.17 [95% CI 1.03-1.33]), high abdominal adiposity (OR 1.27 [1.06-1.51]), and low HDL cholesterol (OR 1.27 [1.10-1.47]). An additional hour spent playing PC/video games also increased the risk of high abdominal adiposity (OR 1.20 [1.03-1.40]). Prospective observations and interventions are needed to determine causal relationships between screen-based sedentary behavior and CVD risk profiles in Korean youth.

Keyword

Adolescent; CVD Risk Factors; KNHANES; Physical Activity; Sedentary Behavior

MeSH Terms

Abdominal Fat
Adolescent
Cardiovascular Diseases/*etiology
Child
Cholesterol, HDL/blood
Cross-Sectional Studies
Exercise
Female
Health Behavior
Humans
Male
Nutrition Surveys
Odds Ratio
Overweight
Questionnaires
Republic of Korea
Risk Factors
*Sedentary Lifestyle
Socioeconomic Factors
Video Games/psychology

Figure

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  Fig. 1 Average time spent in screen-based sedentary behavior and physical activity (PA) between boys (closed ▪) and girls (open □). *P < 0.01, †P < 0.001 between boys and girls.

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  Fig. 2 Average time spent watching TV in boys and girls across the ages. F = 3.63, df = 6, P for trend = 0.002 for boys and girls.

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