ANALISE DA COMPOSIÇÃO CORPORAL VIA MODELO DE REGRESSÃO BETA
Main Article Content
Abstract
Population aging is a social reality. With advancing age come changes in body composition, such as increased weight, fat mass and reduced bone mass and lean. Body composition is dened as the ratio between the dierent components of the body, being expressed by percentages of fat, lean and bone mass. Its analysis is important to determine the components of the body aiding in weight loss programs and fitness. In addition, its review is an important mechanism for detection and prevention of some chronic diseases. The main objective of this paper is to analyze and investigate the relationship of body composition with age, gender, level of physical activity (IPAQ) and body mass index (BMI) of healthy individuals evaluated in the Endocrinology and Metabolism Department, at the Clinical Hospital of the Federal University of Paraná. As the percentage of fat, lean and bone masses belong to the unit interval (0,1) assumed Beta distribution for each of them, making use of the Beta regression model available in betareg software package R. The results showed that body composition of men and women was different. With advancing age there was an increase in body fat percentage and reduction in the percentage of lean and bone mass, both men and women. The level of physical activity, estimated by the IPAQ, proved to be a determining factor in body composition, such that active individuals had higher percentage of lean mass and a lower percentage of body fat, however, for the bone mass percentage, the IPAQ was not relevant.
Article Details
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).