%0 Journal Article %T Variables sociodemogr¨¢ficas y conductas de riesgo en la infecci¨®n por el VIH y las enfermedades de transmisi¨®n sexual en adolescentes: Espa£¿a, 2007 %A Teva %A Inmaculada %A Berm¨²dez %A Ma Paz %A Buela-Casal %A Gualberto %J Revista Espa£¿ola de Salud P¨²blica %D 2009 %I Ministerio de Sanidad y Consumo %R 10.1590/S1135-57272009000200013 %X background: the development of hiv and std prevention programs needs information about sexual behaviour. the aim of this study is to analyze whether there were differences in hiv/std risk behaviours according to type of high school (public/private), gender and age in adolescents. methods: a representative sample of 4.456 adolescents participated. to select the participants, a stratified random sampling considering spanish regions and type of high school was used. it is a cross-sectional survey study. results: the percentage of adolescents that did not use condoms at first sexual intercourse was higher in private than in public high schools (¦Ö2 (1)=5,06; p=0,02). adolescents who were between 17 and 18 years old had the highest percentage of non condom use at last sexual intercourse (¦Ö2 (2)= 6,90; p=0,03). a higher percentage of males than females had a casual partner at last sexual intercourse (¦Ö2 (1)=127,79; p=0,00). a higher number of adolescents of private high schools than adolescents of public high schools had used drugs at last sexual intercourse (¦Ö2 (1)=5,72; p=0,02), as well as males compared to females (¦Ö2 (1)=36,37; p=0,00). conclusions: differences in hiv risk behaviours according to sociodemographic variables are shown. therefore, taking into account sociodemographic factors in sexual education programs focused on adolescents seems to be necessary. %K adolescent %K hiv %K acquired immunodeficiency syndrome %K sexuality %K sexual behavior %K sexually transmitted diseases %K spain. %U http://www.scielosp.org/scielo.php?script=sci_abstract&pid=S1135-57272009000200013&lng=en&nrm=iso&tlng=en