Abstract
This study aimed to examine the relationship between study time and Korean adolescents' eating behavior or oral health and subjective health. The sample included 53,667 adolescents (aged 12–18) who participated in the Korea Youth Risk Behavior Web-based Survey. The variables included were eating behavior, oral health, and subjective health. Study time was divided into two groups (above 8 hrs and under 8 hrs). The data were analyzed using the Rao-Scott χ2 test and logistic regression analysis. The adolescents who study above 8 hrs/day had higher possibility of intake breakfast everyday (middle school students: OR = 1.19, 95% CI = 1.11–1.28, high school students: OR = 1.45 95% CI = 1.32–1.59) than adolescents with short study time. Adolescents with long study time had a higher risk of poor oral health assessment. In particular, gingival diseases had a higher risk with long study time (middle school students: OR = 1.14, 95% CI = 1.07–1.23, high school students: OR = 1.19 95% CI = 1.10–1.28). Study time is closely associated with eating behavior or oral health in Korean adolescents.