This cross-sectional study was carried out in 2011 among 1418 year olds in 20 high schools
in Cochabamba (Bolivia) and six in Cuenca (Ecuador) as a part of a larger project. Schools were purposively
selected. A Spanish version of the 12-item AWSA was employed for this study. The assessed aspects of
adolescent sexual behaviour were: reported sexual intercourse, reported positive experience during last
sexual intercourse and reported current use of contraception. The psychometric properties of AWSA were
investigated, and both explanatory and confirmatory factorial analyses were performed.