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.)
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 language | English |
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Pages (from-to) | 76-81 |
Number of pages | 6 |
Journal | Journal of Hand Surgery-American Volume |
Volume | 23 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 1998 |
Externally published | Yes |