Table 2.

Single measure intraclass correlation coefficients for inter- and intra- observer reliability for each of the radiographic measures used

Component	Plane	Intraclass correlation coefficient
		Inter	95% CI	Intra	95% CI
Tibiofemoral angle		0.90	0.85–0.95	0.95	0.92–0.97
Femoral	Varus/valgus (alpha)	0.84	0.79–0.89	0.90	0.86–0.94
	Flexion/extension (gamma)	0.80	0.71–0.90	0.86	0.80–0.92
Tibial	Varus/Valgus (beta)	0.85	0.80–0.91	0.88	0.86–0.90
	Tibial slope (sigma)	0.81	0.77–0.85	0.85	0.80–0.90

CI confidence interval