Levels of Vitamin D and the Association with Body Composition in Adolescents (original) (raw)

This is an observational, cross-sectional study evaluating adolescents from a public school in Curitiba, Brazil (25°25′S 49°15′W). In 2008, 834 students were enrolled at that school, of which 202 were recruited to the study aleatore (CI 95%, type I error 15%, 20% addition to account for possible losses to follow-up) . Were excluded from the study participants with pre-existing diseases such as diabetes mellitus, rheumatologycal diseases, hyperthyroidism, malignancies, asthma, chronic diarrhea and osteo-metabolic diseases. Four students decided not participate in the study, and a total of 198 adolescents (53% females, 47% males) were included in the final analysis.