Table 3.

Intraclass correlations between hard-copy radiographs and PACS measurements for Raters 1 and 2

Radiographic measurement	Number*	Rater 1			Rater 2
		Correlation	Lower 95% confidence limit	Upper 95% confidence limit	Correlation	Lower 95% confidence limit	Upper 95% confidence limit
Right LDFA	80	0.858	0.779	0.909	0.980	0.969	0.987
Left LDFA	80	0.953	0.927	0.970	0.968	0.951	0.980
Right MPTA	80	0.906	0.853	0.939	0.969	0.952	0.980
Left MPTA	80	0.950	0.922	0.968	0.970	0.953	0.980
LLD	78	0.987	0.979	0.992	0.993	0.990	0.996
Right femur	80	0.941	0.909	0.962	0.951	0.924	0.968
Left femur	80	0.948	0.919	0.967	0.999	0.998	0.999
Right tibia	78	0.946	0.915	0.965	0.998	0.997	0.999
Left tibia	80	0.932	0.894	0.956	0.981	0.971	0.988
Delta tibia	78	0.969	0.952	0.980	0.986	0.977	0.991
Delta femur	80	0.980	0.969	0.987	0.546	0.381	0.668

LDFA = lateral distal femoral angle; MPTA = medial proximal tibial angle; LLD = limb length discrepancy; * the number of pairs analyzed for that particular analysis (radiographic measurement).