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Table 3 Preoperative and postoperative OKS in patients with and without a change greater than the MCID from 6 to 12 months

From: One-year Oxford knee scores should be used in preference to 6-month scores when assessing the outcome of total knee arthroplasty

OKS (mean, SD) Change greater than MCID Difference
(95% CI)
P value*
Yes
(n = 381)
No
(n = 1193)
Preoperative 21.1 (7.6) 21.3 (7.8) 0.2 (−0.7 to 1.1) 0.694
6 Months postoperative 30.4 (7.9) 36.7 (8.9) 6.2 (5.2 to 7.2) < 0.001
12 Months postoperative 38.8 (7.4) 35.4 (10.1) 3.4 (2.3 to 4.5) < 0.001
  1. OKS Oxford knee score, MCID minimal clinically important difference
  2. *unpaired t test