de Bruin N C, van Velthoven K A, de Ridder M, Stijnen T, Juttmann R E, Degenhart H J, Visser H K
Department of Paediatrics/Sophia Children's Hospital, Rotterdam, Netherlands.
Arch Dis Child. 1996 May;74(5):386-99. doi: 10.1136/adc.74.5.386.
Data on body composition in conjunction with reference centiles are helpful in identifying the severity of growth and nutritional disorders in infancy and for evaluating the adequacy of treatment given during this important period of rapid growth. Total body fat (TBF) and fat-free mass (FFM) were estimated from total body electrical conductivity (TBEC) measurements in 423 healthy term Caucasian infants, aged 14-379 days. Cross sectional age, weight, and length related centile standards are presented for TBF and FFM. Centiles were calculated using Altman's method, based on polynomial regression and modelling of the residual variation. The TBF percentage steeply increased during the first half year of life, and slowly declined beyond this age. Various simple TBEC derived anthropometric prediction equations for TBF and FFM are available to be used in conjunction with these standards. Regression equations for the P50 and the residual SD, depending on age, weight, or length, are provided for constructing centile charts and calculating standard deviation scores.
结合参考百分位数的身体成分数据有助于识别婴儿期生长和营养障碍的严重程度，并评估在这个快速生长的重要时期所给予治疗的充分性。通过测量423名年龄在14至379天的健康足月白种婴儿的全身电阻抗（TBEC）来估算全身脂肪（TBF）和去脂体重（FFM）。给出了TBF和FFM与年龄、体重和身长相关的横断面百分位数标准。百分位数采用阿尔特曼方法，基于多项式回归和残余变异建模计算得出。TBF百分比在生命的前半年急剧上升，此后缓慢下降。可使用各种基于TBEC得出的简单人体测量学预测方程来结合这些标准计算TBF和FFM。提供了根据年龄、体重或身长得出的P50和残余标准差的回归方程，用于构建百分位数图表和计算标准差分数。
