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Table 6 Ceiling and floor effects of the KOOS and WOMAC. Percentage of patients reporting best possible score (ceiling effect)/ worst possible score (floor effect).

From: Knee injury and Osteoarthritis Outcome Score (KOOS) – validation and comparison to the WOMAC in total knee replacement

 

KOOS

WOMAC

 

Pain

Symptoms

ADL

Sport/Rec

QOL

Pain

Stiffness

Function

Pre-op

1/0

0/1

0/0

0/48

0/14

1/2

2/7

0/0

6 mo

15/0

3/0

8/0

16/16

11/1

27/0

15/0

8/0

12 mo

22/0

12/0

11/0

9/12

17/0

30/0

27/0

11/0