Estimativas dos parâmetros da composição corporal

Abstract

Background: Body composition has been considering an important predictor parameter in different clinical and healthy promotion scenarios. Nevertheless, reference values from healthy community from young to the most advanced age’s samples with generalizable eligibility criteria from bioelectrical impedance equipment are lacking. The objective of this study was to estimates the percentile values of the body composition parameters for healthy individuals from both sexes through different ages. Methods: Cross-sectional study with healthy individuals from the community, older than five years, of both sexes. Body composition was assessed thought electrical bioimpedance. Body composition parameters assessed were: total body fat, percentage of total body fat, fat free mass, percentage of lean mass, fat mass index, and fat free mass index. The relationships of outcome variables (body composition variables) and predictor variable (age) were analyzed using a quantile regression model (5th to 95th). Results: A total of 1241 participants, with median and range age of 27.0 (5 to 99) years, 651 (52.5%) were female, and 777 (73%) Caucasian. Only fat free mass 25th percentile was not significantly associated with age. That is a tendency of increasing with the increase age of the percentage of corporal fat and the corporal index. The fat free mass index shows an increasing tendency from the child to the adult and decreasing from the elderly. Conclusion: The present study estimated the percentile values of the body composition parameters, evaluated through the electrical bioimpedance analysis, for a healthy population of different ethnicities. Age had an association with all parameters at most percentiles in both sexes.