Application of Theory of Planned Behavior on Factors Affecting Premarital Sexual Behavior among High School Students in Boyolali, Central Java

Bela Novita Amaris Susanto1), Ismi Dwi Astuti Nurhaeni2)Eti Poncorini Pamungkasari3)


1)Masters Program in Public Health, Universitas Sebelas Maret

2)Faculty of Social and Political Sciences, Universitas Sebelas Maret

3)Department of Public Health, Faculty of Medicine, Universitas Sebelas Maret



Background: Sexual self-efficacy plays an important role in adolescents’ sexual health. Unsafe sexual behavior in adolescents increases the risk of sexually transmitted in­­fec­tions (STI) and unintended pregnancy. This study aimed to determine factors af­fec­­­ting premarital sexual beha­vior among high school students in Boyolali, Central Java, using Theory of Planned Behavior.

Subjects and Method: This was a cross-sectional study carried out at senior high schools in Boyolali, Central Java, from October to December 2018. A sample of 200 stu­­dents was selected by cluster random sampling. The dependent variable was pre­ma­r­ital sexual behavior. The in­de­pendent variables were knowledge on sexual be­ha­vior, attitude, self-efficacy, religion, pa­rental su­per­vision, access to information, and sub­jec­tive norm. The data were collected by ques­tionnaire and analyzed by a mul­tiple lo­gis­tic reg­ression.

Results: Premarital sexual behavior decreased with high knowledge (b= -3.33; 95% CI= -5.88 to – 0.79; p= 0.010), positive attitude (b= -5.16; 95% CI= -8.63 to -1.70; p= 0.004), strong self-effi­cacy (b= -4.65; 95% CI= -7.37 to -1.94; p= 0.001), good religion and belief (b= -3.95; 95% CI= -6.82 to -1.10; p= 0.007), high parental supervision (b= -3.70; 95% CI= -6.60 to -0.80; p= 0.012), high exposure to information (b= -3.61; 95% CI= -6.10 to -1.12; p= 0.004), and un­sup­por­tive subjective norm (b= -2.43; 95% CI= -4.60 to -0.25; p= 0.029).

Conclusion: Premarital sexual behavior decreases with high knowledge, positive atti­tude, strong self-efficacy, good religion and belief, high parental supervision, high exp­o­s­ure to infor­ma­tion, and unsupportive subjective norm.

Keywords: Premarital sexual behavior, Theory of Planned Behavior

Correspondence: Bela Novita Amaris Susanto. Masters Program in Public Health, Universitas Sebelas Maret, Jl. Ir. Sutami 36 A, Surakarta 57126, Central Java, Indonesia. Email: Mobile: +6285788844440



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