Psychoactive substance abuse and dependence and its association with anxiety disorders: a population-based study of young adults in Brazil.

Objective: To evaluate the association between abuse of and dependence on different psychoactive substances and the presence of anxiety disorders in a sample of young adults from a city in southern Brazil.

Methods: Between 2007 and 2009, we carried out a cross-sectional, population-based study of individuals aged 18-24 years who lived in Pelotas, a city in southern Brazil. We evaluated anxiety disorders using the Mini International Neuropsychiatric Interview 5.

Quality of life and mood disorder episodes: community sample.

Objective: To assess quality of life among Brazilian young adults who are 18-24 years old and who experience depressive, manic/hypomanic, and mixed episodes.

Method: This is a cross-sectional population-based study. The sample was selected in clusters.

[Factors associated with age at first intercourse: a population-based study].

First sexual intercourse is considered an important event in young people's lives and has occurred at an increasingly early age. The aim of this study was to identify factors associated with early age at first intercourse in individuals 18 to 24 years of age in Pelotas, Rio Grande do Sul State, Brazil. This was a population-based cross-sectional study in a representative sample of 1,621 young people from August 2007 to December 2008.

[Mental common disorders and quality of life in young adulthoods: a population-based sample in Pelotas, Rio Grande do Sul State, Brazil].

This study aimed to assess the prevalence of common mental disorders (CMD) and their association with quality of life among young adults in Pelotas, Rio Grande do Sul State, Brazil. This was a cross-sectional population-based study of young people 18 to 24 years of age. Sampling used simple cluster selection.

Prevalence of episodes of mania and hypomania and associated comorbidities among young adults.

Objective: To evaluate the prevalence of episodes of mania and hypomania, as well as associated factors and comorbidities among adults 18 to 24 years old in the city of Pelotas, Brazil.

Method: This is a cross-sectional population-based study. The sample was selected through conglomerates, and episodes of mania and hypomania were assessed using the Mini International Neuropsychiatric.

[Common mental disorders and self-esteem in pregnancy: prevalence and associated factors].

The aim of this study was to assess the prevalence of common mental disorders and the association with self-esteem and other factors in pregnant women. A nested cross-sectional study was performed in a cohort of pregnant women treated in the public health system in Pelotas, Rio Grande do Sul State, Brazil. The Self-Reporting Questionnaire (SRQ-20) was used to screen for common mental disorders and the Rosenberg's Self-Esteem Scale for self-esteem.