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Lookup NU author(s): Richard Cooke
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Aim-To examine the reproducibility of crown-heel length measurement; the precision and reproducibility of knee-heel length measurement; and the association between the two in healthy preterm infants. Methods-Paired crown-heel and knee-heel lengths were measured on 172 occasions by three observers in 43 preterm infants between 205 and 458 days of postconceptional age. Results-Crown-heel length (CHL) measurement was highly reproducible, with a coefficient of variation (CV) of 0.41%. Knee-heel length (KHL) measurement was relatively precise (CV 0.78%), but less reproducible (intra-observer CV 1.77%, intra-observer CV 2.11%), especially in larger infants. The association between KHL and CHL was not consistent and varied with age. KHL was a poor predictor of CHL, with a 95% predictive interval of +/- 27.5 mm. Conclusions-KHL was less reproducible than CHL, especially in larger infants, and a poor predictor of CHL.
Author(s): Griffin IJ, Pang NM, Perring J, Cooke RJ
Publication type: Article
Publication status: Published
Journal: Archives of Disease in Childhood Fetal & Neonatal Edition
Year: 1999
Volume: 81
Issue: 1
Pages: F50-F55
Print publication date: 01/07/1999
ISSN (print): 1359-2998
ISSN (electronic):
Publisher: BMJ Group
