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. Author manuscript; available in PMC: 2016 Oct 20.
Published in final edited form as: Ann Rheum Dis. 2013 Jan 23;73(3):544–550. doi: 10.1136/annrheumdis-2012-202661

Table 1.

Reliability of computed syndesmophyte volume and height measures*

Mean±SD 95% limits
of agreement
1st scan 2nd scan Interscan difference ICC CV (%)
Volume per IDS (n=36) 349±480 mm3 351±483 mm3 5.51±8.63 mm3 0.99 2.05 (−4.0 to 4.0) %
Volume per patient (n=9) 1396±1564 mm3 1404±1564 mm3 18.3±19.6 mm3 0.99 1.31 (−3.0 to 3.0) %
Height per IDS (n=36) 3.48±2.60 mm 3.49±2.62 mm 0.074±0.093 mm 0.99 2.40 (−0.18 to 0.20) mm
Height per patient (n=9) 13.9±7.01 mm 13.9±6.99 mm 0.13±0.13 mm 0.99 0.927 (−0.38 to 0.39) mm
*

Interscan differences are in absolute value.

CV, coefficient of variation; ICC, intraclass correlation coefficient; IDS, intervertebral disk spaces. The 95% limits of agreement are obtained from Bland–Altman analysis.