Perhaps unsurprisingly, there is evidence that these risk behaviours sometimes cluster together. Lastly, the between-group variance component is small but significant, suggesting that teenagers in the same school community are somewhat more like one another in age at first sexual intercourse than teenagers from different school communities, even when important individual and familial characteristics are controlled for. 2000, 27(4):215-223; and zenilman jm et al. More than one third (34. Berman s and hein k, adolescents and stds, in: holmes kk et al.
Sexual risk behaviour
More than one third (39. However, the evidence for the impact of increased pricing on alcohol consumption and on binge drinking among adolescents and young adults is less robust. Of course this simple analysis cannot control for socioeconomic or psychological factors.