Measurement of the scaphoid humpback deformity using longitudinal computed tomography: Intra- and interobserver variability using various measurement techniques

Gregory I. Bain, John D. Bennett, Joy C MacDermid, Gavin P. Slethaug, Robert S. Richards, James H. Roth

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)

Abstract

The intra- and interobserver variability of 3 techniques for measuring the humpback deformity of
37 scaphoids using longitudinal computed tomography was assessed. The 3 measuring techniques
were the lateral intrascaphoid angle, the dorsal cortical angle, and the height-to-length ratio. The
intraobserver reliability of the intrascaphoid angle was poor; the dorsal cortical angle was mod-
rate to excellent, and the height-to-length ratio was excellent. The interobserver reliability of the
intrascaphoid angle was poor to moderate, the dorsal cortical angle was moderate to excellent,
and the height-to-length ratio was moderate to excellent. For all 3 observers, the intra- and
interobserver reliability was the best for the height-to-length ratio and worst for the intrascaphoid
angle. The height-to-length ratio is the most reproducible method of assessing the humpback
deformity. Clinical correlation is required to establish whether the height-to-length ratio will be of
value in predicting the outcome of fractures of the scaphoid. (I Hand Surg 1998;23A:76-81.
Copyright © 1998 by the American Society for Surgery of the Hand.)
Original languageEnglish
Pages (from-to)76-81
Number of pages6
JournalJournal of Hand Surgery-American Volume
Volume23
Issue number1
DOIs
Publication statusPublished - Jan 1998
Externally publishedYes

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