Koo Belinda, Walters Jocelyn, Hockman Elaine, Koo Winston
Department of Pediatrics, Obstetrics and Gynecology, University of Tennessee, Memphis, USA.
J Am Coll Nutr. 2002 Jun;21(3):245-9. doi: 10.1080/07315724.2002.10719217.
To measure body composition in newborn twins and to test the hypothesis that differences in body weights between twins are reflected proportionally by their differences in various components of body composition.
48 pairs of newborn twins delivered at a tertiary teaching hospital had dual energy x-ray absorptiometry (DXA) body composition measurement for bone mineral content (BMC), lean and fat mass (LM, FM). Data analyzed with regression and analysis of variance.
Body weight, BMC, LM and FM increased with increased gestational age (p < 0.001). The percent difference in BW between each twin pair was significantly correlated with percent difference in BMC, LM, and FM (p < 0.001). However, mean (+/- SD) percent difference in body weight (14.3+/-10.0%) was significantly lower (p < 0.001) than FM (26.0+/-15.0%) but was not significantly different from LM (13.4+/-9.0%) or BMC (15.9+/-11.6%).
In newborn twins, body weight and body composition varies with gestational age. For any twin pair, a difference in body weight was correlated with but not proportional to differences in individual components of body composition.
测量新生儿双胞胎的身体成分，并检验双胞胎体重差异是否按身体成分各组成部分的差异成比例反映这一假设。
在一家三级教学医院分娩的48对新生儿双胞胎接受了双能X线吸收法（DXA）测量身体成分，包括骨矿物质含量（BMC）、瘦体重和脂肪量（LM、FM）。数据采用回归分析和方差分析。
体重、BMC、LM和FM随胎龄增加而增加（p<0.001）。每对双胞胎之间体重的百分比差异与BMC、LM和FM的百分比差异显著相关（p<0.001）。然而，体重的平均（±标准差）百分比差异（14.3±10.0%）显著低于FM（26.0±15.0%）（p<0.001），但与LM（1,3.4±9.0%）或BMC（15.9±11.6%）无显著差异。
在新生儿双胞胎中，体重和身体成分随胎龄而变化。对于任何一对双胞胎，体重差异与身体成分各组成部分的差异相关，但不成比例。
