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. Author manuscript; available in PMC: 2011 Jul 5.
Published in final edited form as: Acad Radiol. 2010 Oct 30;18(1):54–62. doi: 10.1016/j.acra.2010.08.021

TABLE 2.

Intraobserver Agreement for Volume, Uni- and Bidimensional, and CT Attenuation Coefficient Measurements

Types of Measurement Average
Concordance
Correlation
Coefficient* 		Average
Mean Relative
Difference (%)* 		Average
Standard
Deviation* 		Average
Trimmed
Standard
Deviation* 		Average
Percentage of
Observations Inside
the Limits (%)*
Volume 0.992 (0.985–0.996) −5.4 (−9.3, −0.2) 0.148 (0.104–0.220) 0.008 (0.064–0.113) 95.0 (90.5, 98.1)
Longest diameter 0.977 (0.971–0.984) −3.2 (−6.0, −0.7) 0.110 (0.098–0.117) 0.086 (0.071–0.095) 94.7 (90.5, 98.1)
Longest perpendicular diameter 0.959 (0.946–0.971) −1.7 (−5.2, 21.3) 0.160 (0.138–0.197) 0.117 (0.100–0.130) 94.3 (90.5, 96.2)
Bidimensional 0.975 (0.959–0.989) −5.1 (−8.4, 0.3) 0.210 (0.186–0.234) 0.165 (0.141–0.187) 94.7 (92.4, 98.1)
CT attenuation coefficient 0.984 (0.974–0.996) 6.6† (−3.1, 13.7) 26.2† (12.6–33.4) 16.4† (10.1–21.6) 94.5 (90.5, 96.2)
*

Numbers in parentheses represent range of each statistical parameter.

†

The numbers in these cells are in Hounsfield units (HU).