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. 2011 Oct 14;470(2):578–583. doi: 10.1007/s11999-011-2116-3

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Fig. 3 — A graph shows the differences between ipsilateral knee pain (IKP) preoperatively and at 3 months and 1 year postoperatively. Before hip reconstruction, the ipsilateral knee WOMAC pain score was worse than that of the contralateral knee (CKP) in 121 patients (48%); it was the same in 118 patients (46%), but better than that of the contralateral knee for only 16 patients (6%). At 3 months, 31 of 197 patients (16%) had an ipsilateral knee WOMAC pain score worse than that of the contralateral side, 139 (70%) had the same score, and 27 (14%) had a score less than that of the contralateral side. At 1 year, 32 of 227 patients (14%) had ipsilateral knee WOMAC pain scores worse than those of the contralateral side, 171 patients (75%) had the same scores, and 24 patients (11%) had scores less than those of the contralateral knee. Hatched bar = preoperative; gray bar = 3 months; black bar = 1 year.