Fig. 5From: Accuracy of intraoperative estimation of femoral stem anteversion in cementless total hip arthroplasty by using a digital protractor and a spirit levelIntraoperative estimation of stem anteversion compared with CT scan shows a low positive correlation in method a (r = 0.456), but high positive correlations in method b (r = 0.808) and method c (r = 0.896). A solid line represents the linear regression between the estimated and true anteversion (r2)Back to article page