Ma, Q., Ono-Kihara, M., Cong, L., Xu, G., Pan, X. and Zamani, S. (2009) Early Initiation of Sexual Activity: A Risk Factor for Sexually Transmitted Diseases, HIV Infection, and Unwanted Pregnancy among University Students in China. BMC Public Health, 9, Article No. 111.
https://doi.org/10.1186/1471-2458-9-111

has been cited by the following article:

• TITLE: A Cox Proportional Hazard Model Approach to Age at First Sexual Intercourse in Nigeria

  AUTHORS: Chukwudi Paul Obite, Desmond Chekwube Bartholomew, Iheoma Blessing Duru, Joan Ismaila-Cosmos, Chidiebere Chukwuemeka

  KEYWORDS: Sexual Intercourse, Socio-Demographic and Cultural Factors, Hazard Rate, Cox Proportional Hazard Model

  JOURNAL NAME: Open Journal of Statistics, Vol.10 No.2, April 10, 2020

  ABSTRACT: Early age at first sexual intercourse comes with many negative sexual outcomes namely: having unprotected sex on first sexual intercourse, condom misuse, high rate of sexually transmitted infections (STIs), teenage pregnancy, increased number of sexual partners, etc. In this paper, we considered some socio-demographic and cultural factors and their relationship with age at first sexual intercourse so as to reduce the numerous negative sexual outcomes of early age at first sexual intercourse using the 2018 Nigerian Demographic and Health Survey data. The analysis was made using the Cox proportional hazard model and the Kaplan-Meier plot. The result shows that some respondents started having their first sexual intercourse at the age of 8 years and about 54.4% of the respondents had their first sexual intercourse before age 17 years. The median age of first sexual intercourse is 16 years which implies that about 50% of the respondents had their first sexual intercourse on or before their 16th birthday. Education, religion, region and residence significantly affects the age of first sexual intercourse while circumcision has no significant effect.