Hong CE. Pediatrics. 9th ed. Seoul: Daehane textbook; 2007. p. 44-53.
Chang SB, Kim S, Han IY, Park YJ, Kang HC, Lee SK. Sexual behavior and related factors of coitus of teenage girls in Korea. J Korean Acad Nurs 2001;31: 921-31.
Groft JN, Hagen B, Miller NK, Cooper N, Brown S. Adolescent health: a rural community’s approach. Rural Remote Health 2005; 5: 366.
Song BS, Sung MS, Kim CG. Sexual knowledge of the male high school students in a rural area of Gangwon province. J Korean Acad Fundam Nurs 2005; 12: 374-81.
Lee IS, Choi GY, Cha SH, Park HY, Lee JJ. A survey on the sexual behavior of adolescents in South Korea: the third survey in 2007. Korean J Obstet Gynecol 2010; 53: 512-9.
Korean statistical information service [Internet]. Daejeon: Statistics Korea [cited 2017 May 25].
Lee SY, Lee HJ, Kim TK, Lee SG, Park EC. Sexually transmitted infections and first sexual intercourse age in adolescents: the nationwide retrospective cross-sectional study. J Sex Med 2015; 12: 2313-23.
Lowry R, Dunville R, Robin L, Kann L. Early sexual debut and associated risk behaviors among sexual minority youth. Am J Prev Med 2017; 52: 379-84.
Kann L, Olsen EO, McManus T, Harris WA, Shanklin SL, Flint KH, et al. Sexual identity, sex of sexual contacts, and health-related behaviors among students in grades 9-12- United States and selected sites, 2015. MMWR Surveill Summ 2016; 65: 1-202.
Tornello SL, Riskind RG, Patterson CJ. Sexual orientation and sexual and reproductive health among adolescent young women in the United States. J Adolesc Health 2014; 54: 160-8.
van Griensven F, Kilmarx PH, Jeeyapant S, Manopaiboon C, Korattana S, Jenkins RA, et al. The prevalence of bisexual and homosexual orientation and related health risks among adolescents in northern Thailand. Arch Sex Behav 2004; 33: 137-47.
International Collaboration of Epidemiological Studies of Cervical Cancer. Comparison of risk factors for invasive squamous cell carcinoma and adenocarcinoma of the cervix: collaborative reanalysis of individual data on 8,097 women with squamous cell carcinoma and 1,374 women with adenocarcinoma from 12 epidemiological studies. Int J Cancer 2007; 120: 885-91.
Baumgartner JN, Waszak Geary C, Tucker H, Wedderburn M. The influence of early sexual debut and sexual violence on adolescent pregnancy: a matched case-control study in Jamaica. Int Perspect Sex Reprod Health 2009; 35: 21-8.
Centers for Disease Control and Prevention. Korea youth risk behavior web-based survey 2016. Cheongju: Ministry of Health and Welfare; 2016 Dec. p. 3-11.
Atwater E. Adolescence. 3rd ed. Englewood Cliff, NJ: Prentice Hall; 1992.
Rodriquez C Jr, Moore NB. Perceptions of pregnant/parenting teens: reframing issues for an integrated approach to pregnancy problems. Adolescence 1995; 30: 685-706.
Rew L, Carver T, Li CC. Early and risky sexual behavior in a sample of rural adolescents. Issues Compr Pediatr Nurs 2011; 34: 189-204.
Jo JY, Kim YH. A path model of self, family, & extrafamilial system factors associated with adolescents’ sexual risk behaviors. J Korean Home Econom Assoc 2006; 44: 181-95.
Pyo EY, An JY, Jeong JO, Yi YJ. Effects of drinking, smoking and drug use experience on adolescents’ sexual intercourse: using the data of the Korea youth risk behavior web-based survey from 2010 to 2014. J Korean Soc Sch Health 2016; 29: 299-309.
Lee GC, Kim YJ, Shin YK, Park SH, Tockgo YC. The state of smoking and alcohol use in Korean adolescents. J Korean Pediatr Soc 1997; 40: 307-17.
Korean National Police Agency. Police white paper 2008. Seoul: Sanghyun;2008. p. 93-104
Han IY, Yoo SK, Park MS, Kim JS, Lee YW. A national survey on the prevalence and risk factors of child sexual abuse. Korean J Soc Welf 2008; 60: 131-53.
Lee J. Effect of early menarche on sexual experience among Korean high school girls. Child Health Nurs Res 2017; 23: 137-46.