Hata T, Deter R L, Hill R M
Department of Obstetrics/Gynecology and Pediatrics, Baylor College of Medicine, Houston, Texas.
Obstet Gynecol. 1991 Sep;78(3 Pt 1):379-84.
We investigated the ability of Rossavik growth models, determined from measurements obtained before 24 weeks (head circumference [HC], abdominal circumference [AC], femur diaphysis length, and estimated fetal weight [EFW]) or 25 weeks (thigh circumference), to predict third-trimester growth and birth characteristics in normally growing triplets. Comparisons of coefficient c values for six anatomical measurements indicated no statistically significant differences in the second-trimester growth of triplets, twins, and singletons. Third-trimester triplet values for HC, AC, and femur diaphysis length were predicted with an accuracy of +/- 6-8%. For thigh circumference and EFW, the comparable values were +/- 17 and +/- 15%, respectively. The HC at birth was predicted without bias; the random error was approximately -27 to 9.0%. Weight, AC, and thigh circumference were systematically overestimated (16.5, 20.9, and 16.3%, respectively). After correction for systematic errors, these characteristics could be predicted with random errors of -13.0 to 9.5% (weight), -12.0 to 2.8% (AC), and -16.7 to 11.3% (thigh circumference). Growth Potential Realization Index values had means of approximately 100% and ranges from 90-121%. The mean triplet value of the Neonatal Growth Assessment Score was 13.6, ranging from 2.8-26.5. These results are similar to those for singletons and twins and indicate that individual assessment of growth in triplets can be performed with the same methods used for both singletons and twins.
我们研究了根据24周前（头围[HC]、腹围[AC]、股骨干长度和估计胎儿体重[EFW]）或25周（大腿围）获得的测量值确定的罗萨维克生长模型预测正常生长三胞胎孕晚期生长和出生特征的能力。对六种解剖学测量的系数c值进行比较表明，三胞胎、双胞胎和单胎在孕中期的生长没有统计学上的显著差异。HC、AC和股骨干长度的孕晚期三胞胎值预测准确率为±6-8%。对于大腿围和EFW，可比值分别为±17%和±15%。出生时的HC预测无偏差；随机误差约为-27%至9.0%。体重、AC和大腿围被系统地高估（分别为16.5%、20.9%和16.3%）。校正系统误差后，这些特征的预测随机误差为-13.0%至9.5%（体重）、-12.0%至2.8%（AC）和-16.7%至11.3%（大腿围）。生长潜能实现指数值的平均值约为100%，范围为90-121%。新生儿生长评估评分的三胞胎平均值为13.6，范围为2.8-26.5。这些结果与单胎和双胞胎的结果相似，表明可以使用与单胎和双胞胎相同的方法对三胞胎的生长进行个体评估。
