Early initiation of sexual activity: a risk factor for sexually transmitted diseases, HIV infection, and unwanted pregnancy among university students in China.
BACKGROUND
To explore any association between the timing of the initiation of sexual activity and sexual behaviors and risks among university students in China.


METHODS
Data were derived from a cross-sectional study on sexual behavior among university students conducted in Ningbo municipality, China, at the end of 2003. Students completed a self-administered, structured questionnaire. Of 1981 sexually active male students, 1908 (96.3%) completed the item for timing of the initiation of sexual activity and were included in bivariate trend analyses and multiple logistic regression analyses to compare the association between this timing and sexual behavior and risks.


RESULTS
Male early sexual initiators had a significantly higher risk profile, including a significantly higher proportion reporting non-regular partners (i.e., casual or commercial partners), multiple partners, diagnosis with a sexually transmitted disease (STD), partner history of pregnancy, partner history of induced abortion, and less condom and oral contraceptive use, compared with late initiators. Multivariate analyses confirmed the increased likelihood of these risks in early initiators versus late initiators, other than partner type during the last year.


CONCLUSIONS
Our results showed that, compared to late initiators, people who initiated sexual activity early engaged in more risky behaviors that could lead to elevated risks of unwanted pregnancies and STDs or human immunodeficiency virus infection. Sex-education strategies should be focused on an earlier age, should include advice on delaying the age of first sexual activity, and should target young people who continue to take sexual risks.
Ma
Qiaoqin
Q
Center for Disease Control and Prevention of Zhejiang Province, Hangzhou, PR China. qiaoqinma@yahoo.com.cn
Ono-Kihara
Masako
M
Cong
Liming
L
Xu
Guozhang
G
Pan
Xiaohong
X
Zamani
Saman
S
Ravari
Shahrzad Mortazavi
SM
Zhang
Dandan
D
Homma
Takayuki
T
Kihara
Masahiro
M
D000367:Age Factors; D002681:China / Q000453:epidemiology; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D012044:Regression Analysis; D012307:Risk Factors; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000453:epidemiology*; D013334:Students; D014495:Universities; D055815:Young Adult