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