Objective: To evaluate the reliability and validity of the Brazilian version of the Pittsburgh Sleep Quality Index. Methods: 309 adolescents, subdivided into a sample of 209 subjects, of whom 25 were ...

In 1987 (4) and 8 years later, in 1995, two cross-sectional household surveys, based on the "UNIFESP Sleep Questionnaire", were carried out in order to estimate the prevalence of sleep complaints ...