The Significance of Roentgenographic Measurement in Scoliosis

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Abstract
The variability in measurement of the angle of curvature in scoliotic spines was estimated by having 50 anteroposterior roentgenograms read in random order twice by 5 orthopedic surgeons. The average error was .+-. 9.degree. (.+-. 2 SD) on duplicate readings, with a range of .+-. 5.degree. to .+-. 15.1.degree. for individual orthopedists. Difficulty in reproducibly choosing the end vertebrae prior to making the angle measurement appeared to be the major source of measurement error.

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