Rate of condom use among sexually active adolescents: a nationwide cross-sectional study in Taiwan from 2012 to 2016

ObjectiveAdolescents’ sexual behaviours are associated with sexually transmitted infections and unwanted pregnancies. This study aimed to estimate the sexual intercourse and condom use rates at first and last sex among Taiwanese adolescents in grades 7–12.DesignA secondary data analysis of the Taiwan Global School-Based Student Health Survey’s 2012–2016 data. The survey was anonymous, cross-sectional and nationwide.SettingTaiwan high school students (grades 7–12).ParticipantsThe sample comprised 27 525 students from junior high schools (grades 7–9), and senior high schools, comprehensive schools, vocational high schools and night schools (grades 10–12).Main outcome measuresThe rate of ever having had sexual intercourse; the rates and factors of condom use at first and last sex.ResultsThe sexual intercourse rate in each school type (in ascending order) was junior high school (1.62%), senior high school (4.14%), comprehensive school (9.08%), vocational high school (14.03%) and night school (41.09%). Condom use rate decreased from 57.07% (95% CI=54.31% to 59.83%) at first sex to 25.72% (95% CI=23.34% to 28.10%) at last sex (pConclusionsThis study highlights an urgent need to instil a proper understanding of protected sex while adolescents are still in their formative years. Despite the low sexual intercourse rate (4.95%), there is lower condom use at last sex than at first sex, which indicates that many sexually active adolescents are not practising protected sex, especially among junior high school students.