Erratum to: The minimal clinically important difference in the Oxford knee score and Short Form 12 score after total knee arthroplasty

Fig. 2 Change in OKS (circles) and SF-12 PCS (squares) with 95 % CI at 1 year according to the level of patient satisfaction with function.The correlation between the change in OKS (dashed line) and SF-12 PCS (solid line) and level of satisfaction is illustrated