Quantitative Evaluation of Articular Involvement of Posterior Malleolus Associated with Operative Indication: A Comparative Study of Six Methods Based on Radiography and CT

Table 3

Agreement between values of any two of the six measurement methods.

	Axial CT linear	Sagittal CT linear	Axial CT plane	3D CT linear	3D CT surface
Plain radiograph linear	5.82, −10.75 to 22.38	−1.22, −17.89 to 15.46	−1.42, −19.69 to 16.84	−2.13, −20.52 to 16.25	8.58, −7.81 to 24.98
Axial CT linear		0.21, −8.82 to 9.24	7.24, 1.21 to 13.28	−0.71, −6.26 to 4.84	10.00, 3.88 to 16.13
Sagittal CT linear			7.03, −1.17 to 15.24	−0.92, −10.72 to 8.89	9.80, 2.87 to 16.73
Axial CT plane				−7.95, −15.83 to −0.07	2.77, 3.02 to 8.55
3D CT linear					10.71, 2.72 to 18.71

Data are presented as mean difference (%), Bland–Altman 95% limits of agreement (mean difference ± 1.96 SD) (%).