| Sixteen-Year Secular Trends in Sleep Duration Among Korean Children and Adolescents |
Hyun Sunwoo1 
, Yaeji Lee2
, Yu-Jin Kwon3
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1Yonsei University College of Medicine, Seoul, Korea
2Department of Biostatistics and Computing, Yonsei University, Seoul, Korea
3Department of Family Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea |
Correspondence:
Yu-Jin Kwon, Tel: 82-31-5189-8777,
Email: digda3@yuhs.ac
|
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Received: 24 May 2024 • Revised: 4 August 2024 • Accepted: 8 August 2024 |
| Abstract |
Objective
This study aimed to analyze trends in adolescent sleep duration over a 16-year period according to sex, educational level, residential area, and obesity.
Methods
In this cross-sectional study, data from the 2007–2022 Korean National Health and Nutrition Examination Survey were analyzed. Total sleep duration was measured using a self-administered questionnaire, and a survey-weighted linear regression analysis, considering the survey year as a continuous variable, was performed to examine the trend. Total sleep duration trends were also analyzed across subgroups categorized according to sex, educational level, residential area, and obesity level.
Results
Total sleep duration showed an overall increasing trend in boys (coefficient=0.027, ptrend<0.001), but no substantial trend was observed in girls (coefficient=0.002, ptrend=0.816). In the residential area-specific analyses, total sleep duration increased only in boys whose residential areas were urban (coefficient=0.017, ptrend<0.001). When classified by educational level, statistically significant increases in total sleep duration were observed among elementary school graduates or less (coefficient=0.018, ptrend=0.001) and middle school graduates (coefficient=0.015, ptrend=0.015). Depending on the obesity level, total sleep duration increased in normal-weight and overweight boys (normal weight: coefficient=0.014, ptrend=0.003; overweight: coefficient=0.038, ptrend=0.025).
Conclusion
This study found increasing or stable trends in sleep duration among adolescents aged 13 to 18 in Korea, with variations observed across subgroups based on sex, residential area, educational level, and obesity status. |
| Key Words:
Sleep duration; Adolescent; Residential area; Educational level; Obesity |
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