Table 2.

Intraclass correlation coefficients for determining interobserver variability

Factor	Intraclass correlation coefficient	95% confidence interval
Flexion anterior line R1 & R2*	0.941	0.891–0.968
Flexion posterior line R1 & R2*	0.954	0.915–0.975
Extension anterior line R1 & R2*	0.947	0.903–0.972
Extension posterior line R1 & R2*	0.955	0.916–0.976

* R1 & R2 indicates Reviewers 1 and 2.