title: Project YOURLIFE (What Young People Think and Feel about Relationships, Love, Sexuality, and Related Risk Behavior): Cross-sectional and Longitudinal Protocol.
abstract: BACKGROUND
  Sexually transmitted infections and unplanned pregnancies affect adolescent sexual health and are serious public health concerns. They result from sexual intercourse in adolescence, which is usually associated with multiple partners, unprotected sex, and condom misuse. This behavior is related to socio-ecological factors that influence lifestyles. The YOURLIFE project aims to find out what young people think and feel about relationships, love, and sexuality, and to assess the associations between these thoughts and attitudes, adolescents' social factors, and sexual health.
  An international school-based study with a cross-sectional and optional subsequent longitudinal design. Three online questionnaires designed for adolescents aged 13/14, 15/16, and 17/18, respectively, will be used. A matching coding system will allow longitudinal follow-up when adolescents reply to follow-up surveys. Questionnaires will include questions related to sociodemographic data; information/communication technologies; leisure time; parental supervision; influences of parents/friends; information sources; messages perceived; and sexuality-related knowledge, attitudes, and opinions. The second and third questionnaires for participants aged 15/16 and 17/18 will also contain variables concerning sexual behavior. Schools will be able to use their results to tailor educational approaches targeting the needs of their students. Multivariate analyses will be performed using the larger international dataset.
  The YOURLIFE project will collect comprehensive information about the socio-ecological determinants of the sexual risk-taking of schooled adolescents worldwide. Effective preventive programs could be subsequently designed and tailored to the specific determinants of adolescents from different schools and settings, and also, when analyzed globally, to public health professionals.
authors.affiliation: Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Navarra Institute for Health Research, Pamplona, Spain; Education of Affectivity and Human Sexuality, Institute for Culture and Society (ICS), University of Navarra, Pamplona, Spain.
authors.forename: Silvia
authors.initials: S
authors.lastname: Carlos
authors.affiliation: Instituto de Investigación Sanitaria de Navarra (IdiSNA), Navarra Institute for Health Research, Pamplona, Spain; Education of Affectivity and Human Sexuality, Institute for Culture and Society (ICS), University of Navarra, Pamplona, Spain; School of Education and Psychology, University of Navarra, Pamplona, Spain.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Osorio
authors.affiliation: Education of Affectivity and Human Sexuality, Institute for Culture and Society (ICS), University of Navarra , Pamplona , Spain.
authors.forename: María
authors.initials: M
authors.lastname: Calatrava
authors.affiliation: Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Navarra Institute for Health Research, Pamplona, Spain; Education of Affectivity and Human Sexuality, Institute for Culture and Society (ICS), University of Navarra, Pamplona, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Lopez-Del Burgo
authors.affiliation: Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Navarra Institute for Health Research, Pamplona, Spain.
authors.forename: Miguel
authors.initials: M
authors.lastname: Ruiz-Canela
authors.affiliation: Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA), Navarra Institute for Health Research, Pamplona, Spain; Education of Affectivity and Human Sexuality, Institute for Culture and Society (ICS), University of Navarra, Pamplona, Spain.
authors.forename: Jokin
authors.initials: J
authors.lastname: de Irala
keywords: adolescence; sex education; sexual behavior; sexual health; sexually transmitted infections