Agyei W K A (Institute of Statistics and Applied Economics, Makerere University, Kampala, Uganda), Eperna E J and Lubega M. Contraception and prevalence of sexually transmitted diseases among adolescents and young adults in Uganda. International Journal of Epidemiology 1992; 21: 981–988. The study is aimed at (i) exploring the knowledge and attitudes of adolescents (15–19 years old) and young adults (20–24 years old) towards sex and contraception (condoms) and (ii) determining their level of knowledge and attitudes towards sexually transmitted diseases (STD) as well as the prevalence of the latter among the sexually active adolescents and young adults. A sample of 4510 respondents (1545 males and 2965 females) aged 15–24 years from urban and rural areas were interviewed. The majority of adolescents and young adults surveyed have a negative attitude towards the use of condoms although most of them agreed that they prevent STD. Over 95% of the respondents have heard about STD and their level of knowledge is retatively high; slightly higher for urban residents and for young males. ApproxImately 21% of the male and 8% of the female respondents admitted having ever contracted STD. The gap between contraceptive knowledge and practice is rather wide. Only a small proportion of the respondents were using condoms at the time of the survey.