[Knowledge, attitudes and behaviours about AIDS in Portuguese adolescents in urban and non-urban environment].

The main objective of this investigation was to identify and compare preventive knowledge, attitudes and behaviors regarding AIDS between adolescents at the secondary school in urban and non-urban areas in Portugal. This is a descriptive study with a sample of 826 individuals (455 adolescents from urban environment and 371 from a non-urban environment). The instrument for data collection adopted was based on the Health Belief Model conceptual model.