[Quality of life among adolescents: a cross-sectional study using the SF-12 questionnaire].

Adolescence is a stage of life when potentially harmful behaviors to health can be initiated. For this reason, the assessment of quality of life at this age is useful to identify higher risk groups that may prejudice general well-being. This study aimed to evaluate the quality of life and associated factors in a sample of 754 adolescents between the ages of 15 and 19.

[Psychometric properties of the quality of life assessment instrument: 12-item health survey (SF-12)].

This article aims to assess the psychometric properties of the 12-Item Health Survey (SF-12). Data from an epidemiological oral health survey conducted in 2008/2009 in the municipality of Montes Claros, MG were used, consisting of 2157 individuals of both sexes. The relational structure of the SF-12 was assessed by Factor Exploratory Analysis (FEA), the reliability was assessed using Cronbach's alpha coefficient and Pearson's correlation coefficient was adopted in order to assess the correlations between each questionnaire item and the final scores.