Variability in Cobb angle measurements in children with congenital scoliosis

R. T. Loder, A. Urquhart, H. Steen, G. Graziano, R. N. Hensinger, A. Schlesinger, M. A. Schork, Y. Shyr

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

The variability in measurement of angles in congenital scoliosis is not known, but it is postulated that it is larger than that in adolescent idiopathic scoliosis due to skeletal immaturity, incomplete ossification, and anomalous development of the end-vertebrae. To determine this variability, we selected 54 radiographs of adequate quality showing 67 scoliotic curves from children with congenital scoliosis. The end-vertebrae were preselected. Each curve was measured by the Cobb method on two separate occasions by six different observers, using the same goniometer and marker, The intraobserver variability was ± 9.6° and the interobserver variability ± 11.8°. If 'significant progression' is to be used as a criterion for surgical fusion in congenital scoliosis, there should be at least a 23° increase, the entire range of the interobserver variability, in the curvature to ensure that the perceived increase is not due to variability in measurement.

Original languageEnglish (US)
Pages (from-to)768-770
Number of pages3
JournalJournal of Bone and Joint Surgery - Series B
Volume77
Issue number5
DOIs
StatePublished - 1995

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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    Loder, R. T., Urquhart, A., Steen, H., Graziano, G., Hensinger, R. N., Schlesinger, A., Schork, M. A., & Shyr, Y. (1995). Variability in Cobb angle measurements in children with congenital scoliosis. Journal of Bone and Joint Surgery - Series B, 77(5), 768-770. https://doi.org/10.1302/0301-620x.77b5.7559707