1. Prediction equations for fat and fat-free body mass in adolescents, based on body circumferences
- Author
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Lucia Fatima Campos Pedrosa, Severina Carla Vieira Cunha Lima, Clélia de Oliveira Lyra, Kenio Costa de Lima, and Ricardo Fernando Arrais
- Subjects
Male ,Aging ,medicine.medical_specialty ,Adolescent ,Physiology ,Epidemiology ,Fat body mass ,Fat-free body mass ,Body adiposity index ,Body composition ,Models, Biological ,Animal science ,Classification of obesity ,Internal medicine ,Linear regression ,Electric Impedance ,Genetics ,medicine ,Body Size ,Humans ,Child ,Adiposity ,Mathematics ,Anthropometry ,Body volume index ,Body Weight ,Public Health, Environmental and Occupational Health ,Body Shape Index ,Prediction equations ,Endocrinology ,Adipose Tissue ,Lean body mass ,Regression Analysis ,Female ,Body mass index ,Bioelectrical impedance analysis - Abstract
Fat mass (FM) and fat-free body mass (FFB) are important parameters for assessing nutritional status, since they are associated with higher prevalence of excess body fat and malnutrition worldwide. To develop prediction equations for fat and fat-free body mass in adolescents using body circumferences. This cross-sectional study included 218 adolescents (10-16 years) with normal weight as defined by body mass index. FM(Pred) and FFB(Pred) were estimated using stepwise multiple linear regression, considering age and body circumferences. Response variables, FM(BIA) and FFB(BIA) were estimated using bioelectric impedance analysis (BIA). The accuracy of the prediction equations was evaluated using the coefficient of determination (R(2)) and Akaike's Information Criterion (AIC). The best prediction equations for males were FM(Pred) = -7.114 - 0.592(age) - 0.958(wrist)+0.191(hip)+0.295(abdomen); R(2) = 0.552; AIC = 416.04 and FFB(Pred) = - 52.180+1.913(age)+1.954(wrist)+1.635(forearm); R(2) = 0.869; AIC = 578.24. For females, the best equations were FM(Pred) = -17.580 - 0.678(wrist)+0.221(abdomen)+0.241(hip)+0.202(proximal thigh) - 0.228(calf); R(2) = 0.838; AIC = 415.36 and FFB(Pred) = -31.066+0.90(age)+1.090(wrist) - 0.139(abdomen)+0.326(hip)+0.632(calf); R(2) = 0.878; AIC = 512.48. The equations developed to estimate fat body mass in females and fat-free body mass in both genders had high adjusted coefficients of determination and are therefore preferable to those derived using BIA.
- Published
- 2012