Objective: The aim of the study is to develop separate typologies of adolescent boys and girls based on the frequency and specificity of their antisocial behaviour and to validate these typologies on the basis of the relationships among antisocial behaviour, substance abuse, the occurrence of risk sexual behaviour. Material and methods: Data from the SAHA project (The Social and Health Assessment) were used to analyze the antisocial behaviour of adolescent boys (N = 733) and girls (N = 1110).
Results: Non-hierarchical cluster analysis identified four types of antisocial behaviour in boys; 1. adolescents with non-problem behaviour, 2. less severe conduct problems, 3. less severe conduct problems with drug and alcohol abuse, and with consequences from formal authorities, and 4. severe antisocial behaviour. In the group of girls, three types of antisocial behaviour have been identified, types 2 and 3 created one: less severe conduct problems.
The typology has been validated on the basis of positive relations among the extent of antisocial behaviour in boys and in girls with the rate of substance use (cigarettes, alcohol, marijuana and hard drugs) and risky sexual behaviour. Conclusion: The results have demonstrated the importance of creating separate typologies for girls and boys, each cluster differs not only in number (four types of boys, three types of girls), but also in the presence and frequency of individual antisocial manifestations.