Ray Sastri * , Khairil Anwar Notodiputro
Factors affecting adolescent sexual experience have been udied many researchers, but the concern on the age at the first exposure to sex experiences has not been studied. This study aims to investigate the age distribution of the first time of sexual experiences among adolescent in Indonesia as well as its determinant factors. The Indonesian Demographic and Health Survey (IDHS) 2017 data is utilized in this study. Cox regression model is utilized to model both the event and censored data. Since the model failed to satisfy the proportional hazard assumption then stratification by education and having a boyfriend/girlfriend was required. The results showed that the average age first time sexual experience among adolescent in Indonesia is 18.48 years. Consumption of cigarette, alcohol, drug, having friend who had sex before marriage, perception about sex, and the living area are significantly influencing the age first time they experienced sex. The results also showed that having a friend who had sex before marriage provides the highest hazard ratio. It also showed that the hazards in Maluku and Papua were the highest when compared to others areas.