Comparação de métodos para estimativa de peso, altura e composição corporal de homens adultos / Comparison of methods for estimates of the weight, height and body composition of the men adults

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The study had as objective to compare the results, of the nutritional evaluation, from anthropometric and body composition measurements in adult men. The study was cross-sectional and conducted at the Division of Health of the Federal University of Viçosa during the months of February and October 2005. The sample it was constituted of 98 healthy men with age between 20 and 58 years. Anthropometric and body composition measurements were performed in the morning after the subjects fasted for at least 10h. All subjects abstained from vigorous exercise for at least 12h and from alcoholic beverage for least 48h. The anthropometric evaluation included measured of weight, height, circumferences and skinfolds. The body composition was evaluated by anthropometry-based equations, near infrared interactance (Futrex-5000), legto-leg bioelectrical impedance (Tanita Tbf-531) and tetrapolar bioelectrical impedance (Biodynamics model 310). Tetrapolar bioelectrical impedance was used as a frame of reference for comparison with the other methods used in the evaluation of the body composition. Indirect estimates of weight and height were calculated using prediction equations based on knee height, arm span, half arm span. Statistical analysis included paired t-test for means, correlation coefficient analysis, test of Bland &Altman (1986) and Odds Ratio (OR). For all analysis, significance level was set at p 0.05. The equation of the Jackson &Pollock that included 7 skinfolds, age, waist and arm circumference and leg-to-leg bioelectrical impedance displayed the highest agreement with tetrapolar bioelectrical impedance. The waist circumference was the index that was correlated more strongly with IMC (r=0,884; p<0,01) and with the percentage fat (r=0,779; p<0,01). The sensitivity of the IMC to identify subjects with waist circumference, waist: hip ratio and percentage fat elevated was 94.4%, 100% and 86.6%, respectively. Positive predictive value was low: 47,2% for waist circumference, 11.1% for waist:hip ratio and 36.1% for percentage fat. Subjects with age higher than 30 years was risk factor for overweight [ OR=4,13; IC(95%): 1,71 - 9,95] and abdominal obesity [OR=3,51; IC(95%): 1,14 - 10,89]. Difference between actual and predicted weight were significant (r=0,849; p<0,01). Of the five used methods to estimate height, only the equation of Chumlea et al. (1994) validated for adult white men was adequate. Arm span (r=0,789; d=2,67; p<0,001) and half arm span (r=0,790; d=2,51; p<0,001) measurement overestimated the actual height. When the IMC was calculated with predicted weight and height by recumbent measurement to overestimate undernutrition and underestimated overweight, except for equations validated men adults. In conclusion, the equation validated by Chumlea et al. (1984) for adult white men was the most adequate to estimate height. Therefore, the results of the present study indicate that more validation studies are needed for our population, whereas the majority of the estimates obtained were significantly different on several methods frequently used in the practical clinic and population studies.

ASSUNTO(S)

antropometria composição corporal adultos adults men body composition ciencias da saude anthropometry homens

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