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Prediction of neonatal crown–heel length in normal singletons, twins, and triplets using individualized growth assessment
Author(s) -
Milner Lizabeth L.,
Deter Russell L.,
Hill Reba M.,
Hegemier Suzanne,
Hata Toshiyuki,
Stefos Theodor
Publication year - 1994
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870220407
Subject(s) - medicine , standard error , heel , standard deviation , systematic error , random error , fetal growth , statistics , mathematics , fetus , pregnancy , biology , anatomy , genetics
Abstract In groups of normally growing singletons (20), twins (20), and triplets (13), predicted femur diaphysis length (FDL) values at birth were obtained using Rossavik growth models specified from second‐trimester ultrasound studies of fetal growth. Six previously published functions were utilized to obtain predicted crown–heel length (CHL) values from predicted FDL values. These values were compared to the actual CHL values and the percent differences calculated. Based on their systematic (mean percent difference) and random (standard deviation of percent difference) prediction errors, the functions of Vintzileos (singletons), Hadlock (twins), and Brown (triplets) were found to give optimal results (no systematic error; random error: ±6%). Using predicted CHL values obtained with these optimal functions, growth potential realization index values for CHL (GPRI CHL ) were determined for singletons, twins, and triplets. In all three groups, the mean GPRI CHL value was 100% with a range of ∼95% to 105%. These results indicate that the CHL can be predicted from second‐trimester growth patterns and evaluated using individualized growth assessment methods. © 1994 John Wiley & Sons, Inc.