A Technique of Predicting Radiographic Joint Line and Posterior Femoral Condylar Offset of the Knee

Table 3

Intraclass correlation coefficient for intra- and interobserver reliability for the different radiographic measurements and ratios.

Measure	Intraobserver reliability			Interobserver reliability
	𝑟	95% CI	𝑃 value	𝑟	95% CI	𝑃 value
Joint line	0.95	0.87 to 0.98	<0.001	0.83	0.09 to 0.95	<0.001
PCO	0.94	0.74 to 0.98	<0.001	0.84	0.1 to 0.95	<0.001
Femoral diaphysis	0.89	0.79 to 0.95	<0.001	0.81	0.02 to 0.95	<0.001
Joint line ratio	0.84	0.68 to 0.92	<0.001	0.93	0.85 to 0.96	<0.001
PCO ratio	0.90	0.63 to 0.96	<0.001	0.93	0.86 to 0.97	<0.001