ESTIMATING BODY-COMPOSITION OF YOUNG-CHILDREN BY USING BIOELECTRICAL RESISTANCE

被引:88
作者
GORAN, MI
KASKOUN, MC
CARPENTER, WH
POEHLMAN, ET
RAVUSSIN, E
FONTVIEILLE, AM
机构
[1] UNIV VERMONT,SIMS OBESITY NUTR RES CTR,BURLINGTON,VT 05405
[2] NIH,CLIN DIABETES & NUTR SECT,PHOENIX,AZ 85016
关键词
FAT-FREE MASS; FAT MASS; TOTAL BODY WATER;
D O I
10.1152/jappl.1993.75.4.1776
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
It is currently unclear whether age-specific equations should be used for assessing body composition from bioelectrical resistance. Kushner et al. (Am. J. Clin. Nutr. 56: 835-839, 1992) showed that the relationship between height2/resistance and total body water (TBW) is robust across a wide age range, although uncertainty remained over the relationship in preschool children. We therefore cross-validated the Kushner equation for predicting total body water in 4- to 6-yr-old children in two independent laboratories. TBW was measured from (H2O)-O-18 dilution, and bioelectrical resistance and reactance were measured using an RJL 101A analyzer in 31 children (15 females, 16 males; 5 +/- 0.8 yr) studied in Burlington, Vermont, and 30 children (14 females, 16 males; 5 +/- 0.2 yr) studied in Phoenix, Arizona. There was no significant difference between TBW predicted from the Kushner equation and that measured in children in Burlington (11.76 +/- 2.00 vs. 11.91 +/- 2.46 kg, r = 0.94) or in Phoenix (11.53 +/- 1.64 vs. 11.66 +/- 1.90 kg; r = 0.94). The Kushner equation for TBW can be transformed into an equation for fat-free mass (FFM) by using published age- and gender-specific constants for the hydration of FFM: hydration of FFM = 76.9 - 0.25 age (yr) - 1.9 gender where female equals 0 and male equals 1. The intraclass reliability for estimates of fat mass and FFM with the use of bioelectrical resistance in an independent group of 26 children (5.0 +/- 0.8 yr, 20.2 +/- 3.0 kg) was >0.99 for duplicate observations performed 2 wk apart. We conclude that the relationship between TBW and height2/resistance in young children is robust across independent laboratories and that the Kushner equation relating these two variables is viable in young children.
引用
收藏
页码:1776 / 1780
页数:5
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