Measurement of the scaphoid humpback deformity using longitudinal computed tomography: intra- and interobserver variability using various measurement techniques
Date
1998
Authors
Bain, G.
Bennett, J.
MacDermid, J.
Slethaug, G.
Richards, R.
Roth, J.
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Journal article
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Journal of Hand Surgery-American Volume, 1998; 23(1):76-81
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Bain, Gregory I. ; Bennett, John D. ; MacDermid, Joy C. ; Slethaug, Gavin P. ; Richards, Robert S. ; Roth, James H.
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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 moderate 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.
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Copyright © 1995 Published by Elsevier Inc.