Korean J Fam Pract. 2018; 8(3): 448-454  https://doi.org/10.21215/kjfp.2018.8.3.448
The Risk Factors Influencing Age of Sexual Debut among South Korean Adolescents Who Have Sex Experiences
Jun Ho Bang, Kwang Wook Jung, Ah Ra Koh, Chun Hwan Kim, Hyo Ji Kim*
Department of Family Medicine, Dongsuwon General Hospital , Suwon, Korea
Hyo Ji Kim
Tel: +82-31-210-0114, Fax: +82-31-211-5145
E-mail: dabu4344@naver.com
ORCID: http://orcid.org/0000-0003-1600-6012
Received: June 13, 2017; Revised: September 1, 2017; Accepted: September 7, 2017; Published online: June 20, 2018.
© The Korean Academy of Family Medicine. All rights reserved.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background: Many studies have shown that adolescents should have a late sexual debut for development of appropriate sexual identity and health behavior. We identified factors influencing adolescent sexual debut age.
Methods: In the 2015 Korean Youth Risk Behavior Web-based Survey, 3,800 students who had had sexual experiences were included. The one-way ANOVA was used to determine whether existence of drinking, smoking, history of sexually transmitted infection, and residential type were associated with sexual debut age. Regression analysis of a complex sample design was used to determine whether ages of drinking and smoking for the first time, first nocturnal emission, and menstruation correlated with sexual debut age.
Results: In both sexes, the sexual debut age was higher in case of presence of a habit of drinking (P<0.001). In boys, the sexual debut age was higher if the habit of smoking was present (P<0.001). Also in girls, the sexual debut age was higher in case of smokers (P=0.495), but the difference was not statistically significant. In both sexes, first drinking, first smoking, first nocturnal emission, and first menstruation ages correlated with sexual debut age (P<0.001).
Conclusion: We verified that the age of drinking and smoking for the first time, first nocturnal emission, and first menstruation correlate with the sexual debut age. The sexual debut age was higher in individuals who had a habit of drinking and smoking than in those who did not. Child sexual violence and sexual abuse is also thought to have an impact.
Keywords: Sexual debut; Adolescent; Sexually Transmitted Disease; Smoking; Alcohols
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