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Table 3 Two by two table of predicted versus actual outcomes of the final PR

From: Prediction of poor outcomes six months following total knee arthroplasty in patients awaiting surgery

  Actual outcome
Predicted outcome AT RISK NOT AT RISK
(Post-operative WOMAC > 40.4) (Postoperative WOMAC ≤ 40.4)
AT RISK 23 32
NOT AT RISK 5 81
TOTAL 28 113