Early ( three-month ) follow-up showed no significant difference between patellar eversion and subluxation in flexion ( mean and 95 % confidence interval [ CI ] , 101 5.37 versus 102 4.14 , respectively ) , Oxford knee scores ( 25 3 versus 27 2.69 , respectively ) , SF-12 , or visual analog scale pain scores ( 1.9 0.54 versus 1.1 0.44 , respectively ) .