Factors associated with crack-cocaine early initiation: a Brazilian multicenter study.

Background: Crack-cocaine dependence is a serious public health issue, related to several psychiatric and psychosocial problems. Crack-cocaine users are usually embedded in a context of great social vulnerability, often associated with violence, poverty, family conflict and easy and early access to alcohol, tobacco and other drugs.

Methods: This cross-sectional study enrolled a consecutive sample of 577 patients admitted to 20 therapeutic communities located in Southern Brazil, between September 2012 and September 2013.

[Translation and adaptation of the Motorcycle Rider Behavior Questionnaire: a Brazilian version].

Traffic accidents are a leading cause of death in young adults. In Brazil, traffic accidents are proportionally more prevalent among motorcyclists as compared to automobile drivers. Although numerous data indicate that individual characteristics are involved in traffic accident risk, there is no instrument in Brazil to assess motorcyclists' traffic behavior.