Table 2.

An analysis of radiograph to navigation correlation and interobserver correlation of limb and implant alignment measurements

Alignment measurement	Radiograph:navigation Pearson correlation coefficient (two-tailed significance)	Observer 1:observer 2 Pearson correlation coefficient (two-tailed significance)
Mechanical axis (AP) preoperative	0.885*	0.762*
Mechanical axis (AP) postoperative	0.081 (0.587)	0.873*
Femoral cut (sagittal) postoperative	0.027 (0.854)	0.693*
Tibial cut (sagittal) postoperative	0.200 (0.168)	0.664*

* Correlation is significant at the 0.01 level (two-tailed); AP = anteroposterior.