Early sexual debut and condom nonuse among adolescents in South Korea

Background: The purpose of this study was to investigate the factors related to sexual debut among adolescents, and to examine the association between subject characteristics and condom nonuse among those who experienced sexual intercourse in South Korea. Methods: Data were obtained from the 2009 Korean Youth Risk Behaviour Survey, a nationally representative sample. Logistic regression analysis was conducted to investigate the factors related to sexual debut, associations of condom nonuse and subject characteristics. Results: Among male adolescents, age, early age at first emission, low academic achievement, living with a step-parent, perceived low level of household income, frequent drinking and smoking, and depressive feelings were associated with early sexual debut. Attending a coeducational school, living with a single biological parent and step-parent, risky health behaviour such as drinking and smoking, and depressive feelings were related risks factors for early sexual debut among female students. Factors associated with condom nonuse included early sexual debut (less than 16 years of age) (odds ratio (OR) = 1.79, 95% confidence interval (CI) = 1.32-2.43) and frequent smoking behaviour (OR = 1.49, 95% CI = 1.08-2.05) for males and early sexual debut (OR = 4.37, 95% CI = 1.02-18.68) and frequent drinking (OR = 2.05, 95% CI = 1.12-3.75) for females. Conclusions: Appropriate interventions should be implemented for adolescents in Korea to delay sexual debut and educate them on the proper use of condoms.