Background and purpose: Obesity among children and adolescents continues to increase globally, and it is important to determine the factors associated with obesity among adolescents for the prevention and reduction of obesity. The purpose of this study is to understand the factors associated with the increase in the obesity rate among adolescents, providing a reference basis for the development of projects aimed at promoting adolescent health.
Methods: Using the raw data of 2021 adolescent health behavior online survey, this study analyzed demographic sociological factors, mental health, exercise habits, health behaviors and other categorical variables, and conducted the frequency, χ2 test for the difference in the proportion of obese and non-obese. According to the hierarchy model of obesity-related variables, binary logistics regression is used for multivariate analysis. This study used the original data of the 2021 Youth Health Behavior Online Survey, and performed frequency, χ2 tests on the differences in the proportion of obese and non-obese for categorical variables such as demographic sociological factors, mental health, exercise habits, and health behaviors. Multivariate analysis was performed using binary logistic regression based on hierarchical models of obesity-related variables.
Results: The obesity rate among Korean adolescents was 18.25 %. The obesity risk for females was reduced by 0.344 times compared to males (95 % CI = 0.327-0.361, p < 0.001); high school students had a 1.4 times higher obesity risk than middle school students (95 % CI = 1.379-1.511, p < 0.001); students with "Subjective household economic status" rated as "Medium" and 'Low' had their obesity risk increased by 1.07 times (95 % CI = 1.020-1.124, p < 0.01) and 1.254 times (95 % CI = 1.165-1.350, p < 0.001), respectively, compared to students with 'Subjective household economic status' rated as 'High'; students with 'Moderate' and 'Low' levels of 'Perceived stress' had their obesity risk reduced by 0.78 times (95 % CI = 0.74-0.823, P < 0.001) and 0.75 times (95 % CI = 0.70-0.803, P < 0.001), respectively, compared to students with 'High' levels of 'Perceived stress'; students engaging in 'Muscle strengthening exercise' '1-2 times/week' and "≥ 3 times/week" had their obesity risk reduced by 0.844 times (95% CI = 0.797-0.895, P < 0.001) and 0.575 times (95% CI = 0.537-0.616, P < 0.001), respectively, compared to students not participating in "Muscle strengthening exercise".
Conclusion: The obesity rate of boys is higher than that of girls and high school students is higher than that of middle school students, and obesity is inversely proportional to family economic status. Mental health factors, exercise habits and eating habits are all important factors affecting adolescent obesity. It is suggested that gender differences, psychological factors, health habits, obesity education and healthy eating habits suitable for different age groups should be considered in the formulation of adolescent obesity policy.
Keywords: Adolescents; Healthy habits; Mental health; Obesity rates; Weight.
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