3. Louie KS, de Sanjose S, Diaz M, Castellsague X, Herrero R, Meijer CJ, et al. Early age at first sexual intercourse and early pregnancy are risk factors for cervical cancer in developing countries. Br J Cancer. 2009; 100(7):1191–1197. DOI:
10.1038/sj.bjc.6604974.
Article
4. Fatusi A, Wang W. Multiple sexual partnership mediates the association between early sexual debut and sexually transmitted infection among adolescent and young adult males in Nigeria. Eur J Contracept Reprod Health Care. 2009; 14(2):134–143. DOI:
10.1080/13625180802601110.
Article
5. Mmari K, Sabherwal S. A review of risk and protective factors for adolescent sexual and reproductive health in developing countries: An update. J Adolesc Health. 2013; 53(5):562–572. DOI:
10.1016/j.jadohealth.2013.07.018.
Article
6. Jessor R. Risk behavior in adolescence. A psychosocial framework for understanding and action. J Adolesc Health. 1991; 12(8):597–605. DOI:
10.1016/1054-139x(91)90007-k.
Article
7. Petersen JL, Hyde JS. A meta-analytic review of research on gender differences in sexuality, 1993-2007. Psychol Bull. 2010; 136(1):21–38. DOI:
10.1037/a0017504.
Article
8. Korea Centers for Disease Control and Prevention. 2011 Korea youth risk behavior web-based survey [Internet]. Sejong: Korea Centers for Disease Control and Prevention;2011. cited 2014 October 1. Available from:
http://yhs.cdc.go.kr/.
10. Hussey JM, Hallfors DD, Waller MW, Iritani BJ, Halpern CT, Bauer DJ. Sexual behavior and drug use among Asian and Latino adolescents: Association with immigrant status. J Immigr Minor Health. 2007; 9(2):85–94. DOI:
10.1007/s10903-006-9020-z.
11. Madkour AS, Farhat T, Halpern CT, Godeau E, Gabhainn SN. Early adolescent sexual initiation as a problem behavior: A comparative study of five nations. J Adolesc Health. 2010; 47(4):389–398. DOI:
10.1016/j.jadohealth.2010.02.008.
Article
12. Aras S, Semin S, Gunay T, Orcin E, Ozan S. Sexual attitudes and risk-taking behaviors of high school students in Turkey. J Sch Health. 2007; 77(7):379–381. DOI:
10.1111/j.1746-1561.2007.00223.x.
Article
13. Makenzius M, Larsson M. Early onset of sexual intercourse is an indicator for hazardous lifestyle and problematic life situation. Scand J Caring Sci. 2013; 27(1):20–26. DOI:
10.1111/j.1471-6712.2012.00989.x.
Article
14. Ko S. Drinking behaviors linked to sexual intercourse. J Korean Alcohol Sci. 2012; 13(1):123–132.
15. Miller JW, Naimi TS, Brewer RD, Jones SE. Binge drinking and associated health risk behaviors among high school students. Pediatrics. 2007; 119(1):76–85.
Article
16. Tu X, Lou C, Gao E, Li N, Zabin LS. The relationship between sexual behavior and nonsexual risk behaviors among unmarried youth in three Asian cities. J Adolesc Health. 2012; 50(3):S75–S82. DOI:
10.1016/j.jadohealth.2011.12.010.
Article
17. Nelson MC, Gordon-Larsen P. Physical activity and sedentary behavior patterns are associated with selected adolescent health risk behaviors. Pediatrics. 2006; 117(4):1281–1290. DOI:
10.1542/peds.2005-1692.
Article
18. Spriggs AL, Halpern CT. Sexual debut timing and depressive symptoms in emerging adulthood. J Youth Adolesc. 2008; 37(9):1085–1096. DOI:
10.1007/s10964-008-9303-x.
Article
19. Rink E, Tricker R, Harvey SM. Onset of sexual intercourse among female adolescents: The influence of perceptions, depression, and ecological factors. J Adolesc Health. 2007; 41(4):398–406. DOI:
10.1016/j.jadohealth.2007.04.017.
Article
20. Cooper ML, Shapiro CM, Powers AM. Motivations for sex and risky sexual behavior among adolescents and young adults: A functional perspective. J Pers Soc Psychol. 1998; 75(6):1528–1558. DOI:
10.1037/0022-3514.75.6.1528.
Article
22. National Guidelines Task Force. Guidelines for comprehensive sexuality education: Kindergarten-12th grade. 3rd ed. New York: SIECUS;2004. p. 112.